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<!--Date of creation: 05/15/2026-->
<!--Software architectural design and coding: A'c Dharmapremananda Avt.-->
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl_be6d3a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl_be6d3a" xml:lang="en-US">UNAUDITED INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl_cc3aff" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementTable_lbl_cc3aff" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl_2536fa" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl_2536fa" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember" xlink:label="us-gaap_CommonClassBMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassBMember" xlink:to="us-gaap_CommonClassBMember_lbl_444b87" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonClassBMember_lbl_444b87" xml:lang="en-US">Class B Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl_cbf0aa" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonClassAMember_lbl_cbf0aa" xml:lang="en-US">Class A Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="us-gaap_SeriesAPreferredStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesAPreferredStockMember" xlink:to="us-gaap_SeriesAPreferredStockMember_lbl_282fcf" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl_282fcf" xml:lang="en-US">Series A Preferred Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesCPreferredStockMember" xlink:label="us-gaap_SeriesCPreferredStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesCPreferredStockMember" xlink:to="us-gaap_SeriesCPreferredStockMember_lbl_750625" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl_750625" xml:lang="en-US">Series C Preferred Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesBPreferredStockMember" xlink:label="us-gaap_SeriesBPreferredStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesBPreferredStockMember" xlink:to="us-gaap_SeriesBPreferredStockMember_lbl_307556" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl_307556" xml:lang="en-US">Series B Preferred Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl_aac9dc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl_aac9dc" xml:lang="en-US">ASSETS</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl_40bb5f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl_40bb5f" xml:lang="en-US">Current assets:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_972727" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_972727" xml:lang="en-US">Cash</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl_ef83b4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl_ef83b4" xml:lang="en-US">Prepayments and other current assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RelatedPartyTransactionsDueFromRelatedPartiesCurrent" xlink:label="class_RelatedPartyTransactionsDueFromRelatedPartiesCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactionsDueFromRelatedPartiesCurrent" xlink:to="class_RelatedPartyTransactionsDueFromRelatedPartiesCurrent_lbl_3b0ce3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RelatedPartyTransactionsDueFromRelatedPartiesCurrent_lbl_3b0ce3" xml:lang="en-US">Due from related parties</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl_1ff378" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl_1ff378" xml:lang="en-US">Total current assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl_7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl_7" xml:lang="en-US">[Assets, Current]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_AssetsNoncurrentAbstract_lbl_26e905" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl_26e905" xml:lang="en-US">Noncurrent assets:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl_02ffd4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl_02ffd4" xml:lang="en-US">Property and equipment, net</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_lbl_df4d02" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl_df4d02" xml:lang="en-US">Intangible assets, net</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl_ce39c8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl_ce39c8" xml:lang="en-US">Operating lease right-of-use assets, net</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedInvestmentsNoncurrent" xlink:label="us-gaap_RestrictedInvestmentsNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedInvestmentsNoncurrent" xlink:to="us-gaap_RestrictedInvestmentsNoncurrent_lbl_3497b3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedInvestmentsNoncurrent_lbl_3497b3" xml:lang="en-US">Investment accounts-restricted</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments" xlink:label="us-gaap_Investments" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Investments" xlink:to="us-gaap_Investments_lbl_0e7baa" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Investments_lbl_0e7baa" xml:lang="en-US">Investment accounts-unrestricted</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:label="us-gaap_DepositsAssetsNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsAssetsNoncurrent" xlink:to="us-gaap_DepositsAssetsNoncurrent_lbl_9104ec" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepositsAssetsNoncurrent_lbl_9104ec" xml:lang="en-US">Deposit</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl_ba6135" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsNoncurrent_lbl_ba6135" xml:lang="en-US">Total noncurrent assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl_15" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrent_lbl_15" xml:lang="en-US">[Assets, Noncurrent]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl_1fadb1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl_1fadb1" xml:lang="en-US">TOTAL ASSETS</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl_16" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl_16" xml:lang="en-US">[Assets]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl_70cd0d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl_70cd0d" xml:lang="en-US">LIABILITIES AND STOCKHOLDERS' EQUITY</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl_798382" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl_798382" xml:lang="en-US">Current liabilities:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl_bbc52c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableCurrent_lbl_bbc52c" xml:lang="en-US">Accounts payable</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="us-gaap_DeferredRevenueCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueCurrent" xlink:to="us-gaap_DeferredRevenueCurrent_lbl_88c5d4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRevenueCurrent_lbl_88c5d4" xml:lang="en-US">Deferred revenues</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DueToRelatedPartyCurrent" xlink:label="class_DueToRelatedPartyCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DueToRelatedPartyCurrent" xlink:to="class_DueToRelatedPartyCurrent_lbl_0babb4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DueToRelatedPartyCurrent_lbl_0babb4" xml:lang="en-US">Due to related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl_d1f95f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl_d1f95f" xml:lang="en-US">Operating lease liabilities - current</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl_8163f2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl_8163f2" xml:lang="en-US">Accrued liabilities and other payables</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl_692095" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl_692095" xml:lang="en-US">Total current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl_24" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl_24" xml:lang="en-US">[Liabilities, Current]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesNoncurrentAbstract_lbl_971d3c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract_lbl_971d3c" xml:lang="en-US">Noncurrent liabilities:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleLongTermNotesPayable" xlink:label="us-gaap_ConvertibleLongTermNotesPayable" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleLongTermNotesPayable" xlink:to="us-gaap_ConvertibleLongTermNotesPayable_lbl_58f220" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleLongTermNotesPayable_lbl_58f220" xml:lang="en-US">Convertible notes payable</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl_5546df" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl_5546df" xml:lang="en-US">Operating lease liabilities - noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:to="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl_933fc3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxLiabilitiesNet_lbl_933fc3" xml:lang="en-US">Deferred tax liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantLiabilitiesNoncurrent" xlink:label="class_WarrantLiabilitiesNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantLiabilitiesNoncurrent" xlink:to="class_WarrantLiabilitiesNoncurrent_lbl_9251e5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantLiabilitiesNoncurrent_lbl_9251e5" xml:lang="en-US">Warrant liabilities</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrent" xlink:to="us-gaap_LiabilitiesNoncurrent_lbl_98e6b9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl_98e6b9" xml:lang="en-US">Total noncurrent liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="us-gaap_LiabilitiesNoncurrent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesNoncurrent" xlink:to="us-gaap_LiabilitiesNoncurrent_lbl_30" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesNoncurrent_lbl_30" xml:lang="en-US">[Liabilities, Noncurrent]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl_f34847" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl_f34847" xml:lang="en-US">TOTAL LIABILITIES</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl_31" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl_31" xml:lang="en-US">[Liabilities]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl_ecf0b3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl_ecf0b3" xml:lang="en-US">Commitments and contingencies</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl_6f726a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl_6f726a" xml:lang="en-US">Stockholders' equity:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl_c36cfb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl_c36cfb" xml:lang="en-US">Common stock, value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl_e682fb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl_e682fb" xml:lang="en-US">Preferred stock, value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl_d9963b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl_d9963b" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl_620ffd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl_620ffd" xml:lang="en-US">Accumulated deficit</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl_53bdbd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl_53bdbd" xml:lang="en-US">Total stockholders' equity</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl_38" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_lbl_38" xml:lang="en-US">[Equity, Attributable to Parent]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl_96ecd5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl_96ecd5" xml:lang="en-US">TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl_39" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl_39" xml:lang="en-US">[Liabilities and Equity]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl_98d356" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl_98d356" xml:lang="en-US">Preferred Stock, shares par value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl_850aff" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl_850aff" xml:lang="en-US">Preferred stock, shares authorized</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl_7ece0c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl_7ece0c" xml:lang="en-US">Common stock, shares par value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl_eed196" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl_eed196" xml:lang="en-US">Common stock, shares authorized</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl_3028b7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl_3028b7" xml:lang="en-US">Common stock, shares issued</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl_4cfea1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl_4cfea1" xml:lang="en-US">Common stock, shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl_c88bd4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesIssued_lbl_c88bd4" xml:lang="en-US">Preferred stock, shares issued</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl_d4f519" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl_d4f519" xml:lang="en-US">Preferred stock, shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl_f5f2f8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl_f5f2f8" xml:lang="en-US">UNAUDITED INTERIM CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassAPreferredMember" xlink:label="class_ClassAPreferredMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassAPreferredMember" xlink:to="class_ClassAPreferredMember_lbl_ec1cae" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassAPreferredMember_lbl_ec1cae" xml:lang="en-US">Class A Preferred [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassACommonMember" xlink:label="class_ClassACommonMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassACommonMember" xlink:to="class_ClassACommonMember_lbl_f19335" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassACommonMember_lbl_f19335" xml:lang="en-US">Class A Common [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassBCommonMember" xlink:label="class_ClassBCommonMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassBCommonMember" xlink:to="class_ClassBCommonMember_lbl_862b7d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassBCommonMember_lbl_862b7d" xml:lang="en-US">Class B Common [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassBPreferredMember" xlink:label="class_ClassBPreferredMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassBPreferredMember" xlink:to="class_ClassBPreferredMember_lbl_145b8a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassBPreferredMember_lbl_145b8a" xml:lang="en-US">Class B Preferred [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassCPreferredMember" xlink:label="class_ClassCPreferredMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassCPreferredMember" xlink:to="class_ClassCPreferredMember_lbl_9517d3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassCPreferredMember_lbl_9517d3" xml:lang="en-US">Class C Preferred [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl_f68aec" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenuesAbstract_lbl_f68aec" xml:lang="en-US">Revenues:</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RevenueFromServices" xlink:label="class_RevenueFromServices" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RevenueFromServices" xlink:to="class_RevenueFromServices_lbl_c272b1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RevenueFromServices_lbl_c272b1" xml:lang="en-US">Service revenues</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl_199463" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Revenues_lbl_199463" xml:lang="en-US">Total revenues</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues" xlink:label="us-gaap_Revenues" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Revenues_lbl_4" xml:lang="en-US">[Revenues]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenueAbstract" xlink:label="us-gaap_CostOfRevenueAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenueAbstract" xlink:to="us-gaap_CostOfRevenueAbstract_lbl_d10fc7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenueAbstract_lbl_d10fc7" xml:lang="en-US">Cost of revenues:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsAndServicesSold" xlink:to="us-gaap_CostOfGoodsAndServicesSold_lbl_42cd5a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl_42cd5a" xml:lang="en-US">Cost of revenues</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl_57a9ec" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CostOfRevenue_lbl_57a9ec" xml:lang="en-US">Total cost of revenues</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl_7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenue_lbl_7" xml:lang="en-US">[Cost of Revenue]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_lbl_930b59" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GrossProfit_lbl_930b59" xml:lang="en-US">Gross profit</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_lbl_8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GrossProfit_lbl_8" xml:lang="en-US">[Gross Profit]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="us-gaap_OperatingExpensesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl_4906f2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpensesAbstract_lbl_4906f2" xml:lang="en-US">Operating expenses:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="us-gaap_SellingAndMarketingExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingAndMarketingExpense" xlink:to="us-gaap_SellingAndMarketingExpense_lbl_cb7e46" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingAndMarketingExpense_lbl_cb7e46" xml:lang="en-US">Selling and marketing</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl_ca4308" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl_ca4308" xml:lang="en-US">General and administrative</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl_c56feb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl_c56feb" xml:lang="en-US">Research and development</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_OperatingExpenses_lbl_6131e0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingExpenses_lbl_6131e0" xml:lang="en-US">Total operating expenses</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses" xlink:label="us-gaap_OperatingExpenses" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpenses" xlink:to="us-gaap_OperatingExpenses_lbl_13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingExpenses_lbl_13" xml:lang="en-US">[Operating Expenses]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl_60eb91" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl_60eb91" xml:lang="en-US">(Loss) from operations</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl_14" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl_14" xml:lang="en-US">[Operating Income (Loss)]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl_a33667" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl_a33667" xml:lang="en-US">Other income (expense)</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet_lbl_4a9351" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl_4a9351" xml:lang="en-US">Change in fair value of warrants</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CryptoAssetRealizedGainLossNonoperating" xlink:label="us-gaap_CryptoAssetRealizedGainLossNonoperating" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CryptoAssetRealizedGainLossNonoperating" xlink:to="us-gaap_CryptoAssetRealizedGainLossNonoperating_lbl_c09841" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CryptoAssetRealizedGainLossNonoperating_lbl_c09841" xml:lang="en-US">Change in fair value of crypto assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_GainLossOnChangeInFairValueOfConvertibleDebt" xlink:label="class_GainLossOnChangeInFairValueOfConvertibleDebt" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_GainLossOnChangeInFairValueOfConvertibleDebt" xlink:to="class_GainLossOnChangeInFairValueOfConvertibleDebt_lbl_10bb59" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_GainLossOnChangeInFairValueOfConvertibleDebt_lbl_10bb59" xml:lang="en-US">Change in fair value of convertible debt</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StakingRewardsIncome" xlink:label="class_StakingRewardsIncome" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StakingRewardsIncome" xlink:to="class_StakingRewardsIncome_lbl_e53cdb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StakingRewardsIncome_lbl_e53cdb" xml:lang="en-US">Staking rewards</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeExpenseNonoperatingNet" xlink:to="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl_938104" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeExpenseNonoperatingNet_lbl_938104" xml:lang="en-US">Interest and other expense</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl_d80060" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl_d80060" xml:lang="en-US">Total other (expense)</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl_21" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl_21" xml:lang="en-US">[Other Nonoperating Income (Expense)]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl_efd706" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl_efd706" xml:lang="en-US">(Loss) before provision for income taxes</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl_22" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl_22" xml:lang="en-US">[Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl_efa099" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl_efa099" xml:lang="en-US">Provision for income taxes</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl_c800d2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl_c800d2" xml:lang="en-US">Net (loss)</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl_24" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl_24" xml:lang="en-US">[Net Income (Loss) Attributable to Parent]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDiluted_lbl_6831ad" xml:lang="en-US">Basic and diluted net income per share</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl_3d4ca2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl_3d4ca2" xml:lang="en-US">UNAUDITED INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl_f58285" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl_f58285" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SeriesAPreferredStocksMember" xlink:label="class_SeriesAPreferredStocksMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SeriesAPreferredStocksMember" xlink:to="class_SeriesAPreferredStocksMember_lbl_fc218a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SeriesAPreferredStocksMember_lbl_fc218a" xml:lang="en-US">Preferred Stocks Series A</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SeriesBPreferredStocksMember" xlink:label="class_SeriesBPreferredStocksMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SeriesBPreferredStocksMember" xlink:to="class_SeriesBPreferredStocksMember_lbl_6da8e5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SeriesBPreferredStocksMember_lbl_6da8e5" xml:lang="en-US">Preferred Stocks Series B</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassACommonStockMember" xlink:label="class_ClassACommonStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassACommonStockMember" xlink:to="class_ClassACommonStockMember_lbl_8e00fb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassACommonStockMember_lbl_8e00fb" xml:lang="en-US">Class A Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl_d15858" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl_d15858" xml:lang="en-US">Additional Paid-In Capital</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SeriesCPreferredStocksMember" xlink:label="class_SeriesCPreferredStocksMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SeriesCPreferredStocksMember" xlink:to="class_SeriesCPreferredStocksMember_lbl_dab938" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SeriesCPreferredStocksMember_lbl_dab938" xml:lang="en-US">Preferred Stocks Series C</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl_7fc1bd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl_7fc1bd" xml:lang="en-US">Accumulated Deficit</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassBCommonStockMember" xlink:label="class_ClassBCommonStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassBCommonStockMember" xlink:to="class_ClassBCommonStockMember_lbl_b78152" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassBCommonStockMember_lbl_b78152" xml:lang="en-US">Class B Common Stock</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl_bcd816" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharesIssued_lbl_bcd816" xml:lang="en-US">Balance, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued" xlink:label="us-gaap_SharesIssued" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl_2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesIssued_lbl_2" xml:lang="en-US">[Shares, Issued]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl_17312b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquity_lbl_17312b" xml:lang="en-US">Balance, amount</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl_555687" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl_555687" xml:lang="en-US">Net loss</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl_2461c3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl_2461c3" xml:lang="en-US">Conversion of convertible debt, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl_380506" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl_380506" xml:lang="en-US">Conversion of convertible debt, amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan" xlink:to="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl_85308b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeBenefitPlan_lbl_85308b" xml:lang="en-US">Employee stock compensation, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan" xlink:to="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl_b6646e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeBenefitPlan_lbl_b6646e" xml:lang="en-US">Employee stock compensation, amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockSharesConverted1" xlink:label="us-gaap_ConversionOfStockSharesConverted1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockSharesConverted1" xlink:to="us-gaap_ConversionOfStockSharesConverted1_lbl_07e3b5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl_07e3b5" xml:lang="en-US">Conversion of preferred stock to common stock, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockAmountConverted1" xlink:label="us-gaap_ConversionOfStockAmountConverted1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockAmountConverted1" xlink:to="us-gaap_ConversionOfStockAmountConverted1_lbl_521a26" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockAmountConverted1_lbl_521a26" xml:lang="en-US">Conversion of preferred stock to common stock, amount</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:label="class_StockIssuedDuringPeriodSharesWarrantsExercised" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:to="class_StockIssuedDuringPeriodSharesWarrantsExercised_lbl_1feb04" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StockIssuedDuringPeriodSharesWarrantsExercised_lbl_1feb04" xml:lang="en-US">Issurance of common stock for warrants excise, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StockIssuedDuringPeriodValueWarrantsExercised" xlink:label="class_StockIssuedDuringPeriodValueWarrantsExercised" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockIssuedDuringPeriodValueWarrantsExercised" xlink:to="class_StockIssuedDuringPeriodValueWarrantsExercised_lbl_a04245" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StockIssuedDuringPeriodValueWarrantsExercised_lbl_a04245" xml:lang="en-US">Issurance of common stock for warrants excise, amount</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl_6b6319" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquity_lbl_6b6319" xml:lang="en-US">Balance, amount</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl_0708f0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharesIssued_lbl_0708f0" xml:lang="en-US">Balance, shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl_95300b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl_95300b" xml:lang="en-US">UNAUDITED INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl_ab50f6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl_ab50f6" xml:lang="en-US">Cash flows from operating activities:</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl_3f0871" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProfitLoss_lbl_3f0871" xml:lang="en-US">Net (loss)</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfitLoss_lbl_3" xml:lang="en-US">[Net Income (Loss), Including Portion Attributable to Noncontrolling Interest]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl_1c8ba2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl_1c8ba2" xml:lang="en-US">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl_c27dd6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationAndAmortization_lbl_c27dd6" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense" xlink:to="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl_2bc135" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl_2bc135" xml:lang="en-US">Amortization of operating lease right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl_7d4856" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl_7d4856" xml:lang="en-US">Employee stock compensation</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet_lbl_b2ae92" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl_b2ae92" xml:lang="en-US">Change in fair value of warrants</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CryptoAssetRealizedGainLossNonoperating" xlink:to="us-gaap_CryptoAssetRealizedGainLossNonoperating_lbl_71d643" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_CryptoAssetRealizedGainLossNonoperating_lbl_71d643" xml:lang="en-US">Change in fair value of crypto assets</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_GainLossOnChangeInFairValueOfConvertibleDebt" xlink:to="class_GainLossOnChangeInFairValueOfConvertibleDebt_lbl_30110f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="class_GainLossOnChangeInFairValueOfConvertibleDebt_lbl_30110f" xml:lang="en-US">Change in fair value of convertible debt</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StakingRewardsIncome" xlink:to="class_StakingRewardsIncome_lbl_411dbc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="class_StakingRewardsIncome_lbl_411dbc" xml:lang="en-US">Staking rewards</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl_ed51a5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl_ed51a5" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseDecreaseInDueFromRelatedParty" xlink:to="class_IncreaseDecreaseInDueFromRelatedParty_lbl_542fcf" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="class_IncreaseDecreaseInDueFromRelatedParty_lbl_542fcf" xml:lang="en-US">Due from related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_IncreaseDecreaseInDueFromRelatedParty" xlink:label="class_IncreaseDecreaseInDueFromRelatedParty" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseDecreaseInDueFromRelatedParty" xlink:to="class_IncreaseDecreaseInDueFromRelatedParty_lbl_13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_IncreaseDecreaseInDueFromRelatedParty_lbl_13" xml:lang="en-US">[Due from related parties]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl_1e54ca" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl_1e54ca" xml:lang="en-US">Prepayments and other current assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl_14" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl_14" xml:lang="en-US">[Increase (Decrease) in Prepaid Expense and Other Assets]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDepositOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInDepositOtherAssets_lbl_55f57e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInDepositOtherAssets_lbl_55f57e" xml:lang="en-US">Deposit</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDepositOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInDepositOtherAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDepositOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInDepositOtherAssets_lbl_15" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDepositOtherAssets_lbl_15" xml:lang="en-US">[Increase (Decrease) in Deposit Assets]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl_62d7a2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl_62d7a2" xml:lang="en-US">Accounts payable</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl_16" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl_16" xml:lang="en-US">[Increase (Decrease) in Accounts Payable]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl_39c4f1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl_39c4f1" xml:lang="en-US">Deferred revenues</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl_17" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl_17" xml:lang="en-US">[Increase (Decrease) in Deferred Revenue]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingLeaseLiability" xlink:to="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl_a66da2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl_a66da2" xml:lang="en-US">Operating lease liabilities</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseDecreaseInDueToRelatedParty" xlink:to="class_IncreaseDecreaseInDueToRelatedParty_lbl_4b99e1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_IncreaseDecreaseInDueToRelatedParty_lbl_4b99e1" xml:lang="en-US">Due to related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_IncreaseDecreaseInDueToRelatedParty" xlink:label="class_IncreaseDecreaseInDueToRelatedParty" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseDecreaseInDueToRelatedParty" xlink:to="class_IncreaseDecreaseInDueToRelatedParty_lbl_19" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_IncreaseDecreaseInDueToRelatedParty_lbl_19" xml:lang="en-US">[Due to related parties]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_lbl_2ccc13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_lbl_2ccc13" xml:lang="en-US">Accrued liabilities and other payables</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_lbl_20" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_lbl_20" xml:lang="en-US">[Increase (Decrease) in Other Accounts Payable and Accrued Liabilities]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl_5b6f7f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl_5b6f7f" xml:lang="en-US">Net cash (used in) operating activities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl_21" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl_21" xml:lang="en-US">[Cash Provided by (Used in) Operating Activity, Including Discontinued Operation]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl_558374" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl_558374" xml:lang="en-US">Cash flows from investing activities:</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl_41449c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl_41449c" xml:lang="en-US">Purchases of property and equipment</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl_23" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl_23" xml:lang="en-US">[Payments to Acquire Property, Plant, and Equipment]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl_1a878a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl_1a878a" xml:lang="en-US">Net cash (used in) investing activities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl_24" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl_24" xml:lang="en-US">[Cash Provided by (Used in) Investing Activity, Including Discontinued Operation]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl_33999a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl_33999a" xml:lang="en-US">Cash flows from financing activities:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRelatedPartyDebt" xlink:to="us-gaap_ProceedsFromRelatedPartyDebt_lbl_6a67bd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl_6a67bd" xml:lang="en-US">Proceeds from promissory notes related party</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl_ff36bc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl_ff36bc" xml:lang="en-US">Net cash provided by financing activities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl_27" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl_27" xml:lang="en-US">[Cash Provided by (Used in) Financing Activity, Including Discontinued Operation]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl_6567a1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl_6567a1" xml:lang="en-US">Net (decrease) increase in cash</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl_28" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl_28" xml:lang="en-US">[Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_6005b1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_6005b1" xml:lang="en-US">Cash, beginning of period</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_c4530e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_c4530e" xml:lang="en-US">Cash, end of period</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl_ed4da1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl_ed4da1" xml:lang="en-US">Supplemental disclosure of cash flow information:</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CashPaidDuringThePeriodAbstract" xlink:label="class_CashPaidDuringThePeriodAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CashPaidDuringThePeriodAbstract" xlink:to="class_CashPaidDuringThePeriodAbstract_lbl_b53a1b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CashPaidDuringThePeriodAbstract_lbl_b53a1b" xml:lang="en-US">Cash paid during the period for:</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl_04d1f2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidNet_lbl_04d1f2" xml:lang="en-US">Interest</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl_26db95" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl_26db95" xml:lang="en-US">Income taxes</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl_3658d0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl_3658d0" xml:lang="en-US">Noncash activities:</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_IssuanceOfCommonStockForWarrantsExercise" xlink:label="class_IssuanceOfCommonStockForWarrantsExercise" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IssuanceOfCommonStockForWarrantsExercise" xlink:to="class_IssuanceOfCommonStockForWarrantsExercise_lbl_1bb9e1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_IssuanceOfCommonStockForWarrantsExercise_lbl_1bb9e1" xml:lang="en-US">Issuance of common stock for warrants excise</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConversionOfConvertibleDebtToCommonStock" xlink:label="class_ConversionOfConvertibleDebtToCommonStock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConversionOfConvertibleDebtToCommonStock" xlink:to="class_ConversionOfConvertibleDebtToCommonStock_lbl_fd4014" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConversionOfConvertibleDebtToCommonStock_lbl_fd4014" xml:lang="en-US">Conversion of convertible debt to common stock</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConversionOfPreferredStockToCommonStock" xlink:label="class_ConversionOfPreferredStockToCommonStock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConversionOfPreferredStockToCommonStock" xlink:to="class_ConversionOfPreferredStockToCommonStock_lbl_d5e990" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConversionOfPreferredStockToCommonStock_lbl_d5e990" xml:lang="en-US">Conversion of preferred stock to common stock</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_InsiderTradingArragementsAbstract" xlink:label="class_InsiderTradingArragementsAbstract" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl_2" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PropertyAndEquipmentAbstract" xlink:label="class_PropertyAndEquipmentAbstract" />
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl_f65350" xlink:type="arc" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_InvestmentsAccountsAbstract" xlink:label="class_InvestmentsAccountsAbstract" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:to="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl_f9fde2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl_f9fde2" xml:lang="en-US">Research and Development Costs</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl_4be797" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl_4be797" xml:lang="en-US">Segment Information and Geographic Data</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingCostsPolicyTextBlock" xlink:label="us-gaap_AdvertisingCostsPolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdvertisingCostsPolicyTextBlock" xlink:to="us-gaap_AdvertisingCostsPolicyTextBlock_lbl_b30252" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdvertisingCostsPolicyTextBlock_lbl_b30252" xml:lang="en-US">Advertising Costs</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesPolicyTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesPolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesPolicyTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesPolicyTextBlock_lbl_c95ab0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesPolicyTextBlock_lbl_c95ab0" xml:lang="en-US">Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeasesPolicyTextBlock" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeLeasesPolicyTextBlock" xlink:to="us-gaap_LesseeLeasesPolicyTextBlock_lbl_ef6bad" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeLeasesPolicyTextBlock_lbl_ef6bad" xml:lang="en-US">Operating Leases</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl_d5a56f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl_d5a56f" xml:lang="en-US">Earnings (loss) per Share</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl_68e6a7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl_68e6a7" xml:lang="en-US">Recently Adopted Accounting Pronouncements</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:label="us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock" xlink:to="us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_lbl_1753eb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfCashAndCashEquivalentsTableTextBlock_lbl_1753eb" xml:lang="en-US">Schedule of cash on hand and bank deposits</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl_56c5a1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl_56c5a1" xml:lang="en-US">Schedule of property and equipment, net</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CryptoAssetHoldingTableTextBlock" xlink:label="us-gaap_CryptoAssetHoldingTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CryptoAssetHoldingTableTextBlock" xlink:to="us-gaap_CryptoAssetHoldingTableTextBlock_lbl_39bf14" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CryptoAssetHoldingTableTextBlock_lbl_39bf14" xml:lang="en-US">Schedule of digital asset holdings</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:to="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl_c59c7e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl_c59c7e" xml:lang="en-US">Schedule of future amortization of intangible assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl_77ef58" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl_77ef58" xml:lang="en-US">Schedule of sublease obligations</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfFutureAmortizationOfTheRightOfUseAssetsTableTextBlock" xlink:label="class_ScheduleOfFutureAmortizationOfTheRightOfUseAssetsTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ScheduleOfFutureAmortizationOfTheRightOfUseAssetsTableTextBlock" xlink:to="class_ScheduleOfFutureAmortizationOfTheRightOfUseAssetsTableTextBlock_lbl_acfede" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfFutureAmortizationOfTheRightOfUseAssetsTableTextBlock_lbl_acfede" xml:lang="en-US">Schedule of future amortization of the right of use assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl_f162d5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl_f162d5" xml:lang="en-US">Schedule of accrued liabilities and other payables</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:to="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl_fc7403" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl_fc7403" xml:lang="en-US">Schedule of income tax provision</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl_ecd00f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl_ecd00f" xml:lang="en-US">Schedule of deferred tax assets (liabilities)</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfAffiliatesAndAffiliatedEntitiesTableTextBlock" xlink:label="class_ScheduleOfAffiliatesAndAffiliatedEntitiesTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfAffiliatesAndAffiliatedEntitiesTableTextBlock_lbl_438c96" xml:lang="en-US">Schedule of affiliates and affiliated entities</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfDueFromRelatedPartiesTableTextBlock" xlink:label="class_ScheduleOfDueFromRelatedPartiesTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfDueFromRelatedPartiesTableTextBlock_lbl_d89b7e" xml:lang="en-US">Schedule of due from related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfDueToRelatedPartiesTableTextBlock" xlink:label="class_ScheduleOfDueToRelatedPartiesTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ScheduleOfDueToRelatedPartiesTableTextBlock" xlink:to="class_ScheduleOfDueToRelatedPartiesTableTextBlock_lbl_7b1f9b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfDueToRelatedPartiesTableTextBlock_lbl_7b1f9b" xml:lang="en-US">Schedule of due to related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl_8ce12b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl_8ce12b" xml:lang="en-US">Schedule of related party transactions</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfRightOfUseAssetsAndOperatingLeaseLiabilitiesRecognizedFromRelatedPartyTableTextBlock" xlink:label="class_ScheduleOfRightOfUseAssetsAndOperatingLeaseLiabilitiesRecognizedFromRelatedPartyTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ScheduleOfRightOfUseAssetsAndOperatingLeaseLiabilitiesRecognizedFromRelatedPartyTableTextBlock" xlink:to="class_ScheduleOfRightOfUseAssetsAndOperatingLeaseLiabilitiesRecognizedFromRelatedPartyTableTextBlock_lbl_aad998" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfRightOfUseAssetsAndOperatingLeaseLiabilitiesRecognizedFromRelatedPartyTableTextBlock_lbl_aad998" xml:lang="en-US">Schedule of ROU assets and operating lease liabilities recognized from related party</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfDescriptionOfConvertibleNotesTableTextBlock" xlink:label="class_ScheduleOfDescriptionOfConvertibleNotesTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfDescriptionOfConvertibleNotesTableTextBlock_lbl_05d88f" xml:lang="en-US">Schedule of description of convertible notes</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" xlink:label="us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_lbl_35ff19" xml:lang="en-US">Schedule of assumptions</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfChangesInTheFairValueOfConvertibleNotesTableTextBlock" xlink:label="class_ScheduleOfChangesInTheFairValueOfConvertibleNotesTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ScheduleOfChangesInTheFairValueOfConvertibleNotesTableTextBlock" xlink:to="class_ScheduleOfChangesInTheFairValueOfConvertibleNotesTableTextBlock_lbl_fee7d2" xlink:type="arc" />
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    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfWarrantLiabilitiesTableTextBlock" xlink:label="class_ScheduleOfWarrantLiabilitiesTableTextBlock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ScheduleOfWarrantLiabilitiesTableTextBlock" xlink:to="class_ScheduleOfWarrantLiabilitiesTableTextBlock_lbl_1a1d83" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfWarrantLiabilitiesTableTextBlock_lbl_1a1d83" xml:lang="en-US">Schedule of warrant liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl_fb6d86" xml:lang="en-US">Schedule of fair value measurements of assets and liabilities on recurring basis</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock" />
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    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ScheduleOfSharesIssuedTableTextBlock" xlink:label="class_ScheduleOfSharesIssuedTableTextBlock" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ScheduleOfSharesIssuedTableTextBlock_lbl_442720" xml:lang="en-US">Schedule of shares issued in connection with merger</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis" />
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassoverNJMember" xlink:to="class_ClassoverNJMember_lbl_7a7c18" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassoverNJMember_lbl_7a7c18" xml:lang="en-US">Classover NJ [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_EquityMethodInvestmentsOwnershipPercentage" xlink:label="class_EquityMethodInvestmentsOwnershipPercentage" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_EquityMethodInvestmentsOwnershipPercentage" xlink:to="class_EquityMethodInvestmentsOwnershipPercentage_lbl_ef1787" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_EquityMethodInvestmentsOwnershipPercentage_lbl_ef1787" xml:lang="en-US">Equity ownership percentage</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash" xlink:label="us-gaap_Cash" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Cash" xlink:to="us-gaap_Cash_lbl_87d6b2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Cash_lbl_87d6b2" xml:lang="en-US">Cash on hand</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Deposits" xlink:label="us-gaap_Deposits" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Deposits" xlink:to="us-gaap_Deposits_lbl_8f7cb9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Deposits_lbl_8f7cb9" xml:lang="en-US">Bank deposits</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_ea4777" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_ea4777" xml:lang="en-US">Total cash shown in the Statement of Cash Flows</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_920624" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl_920624" xml:lang="en-US">Cash</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CurrentLiabilities" xlink:label="class_CurrentLiabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CurrentLiabilities" xlink:to="class_CurrentLiabilities_lbl_db8c93" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CurrentLiabilities_lbl_db8c93" xml:lang="en-US">Current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WorkingCapitalDeficit" xlink:label="class_WorkingCapitalDeficit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WorkingCapitalDeficit" xlink:to="class_WorkingCapitalDeficit_lbl_a3f4ab" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WorkingCapitalDeficit_lbl_a3f4ab" xml:lang="en-US">Working capital deficit</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StockholdersEquities" xlink:label="class_StockholdersEquities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockholdersEquities" xlink:to="class_StockholdersEquities_lbl_ab898b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StockholdersEquities_lbl_ab898b" xml:lang="en-US">Stockholders' deficit</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl_24df3d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl_24df3d" xml:lang="en-US">Net loss</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingExpense" xlink:label="us-gaap_AdvertisingExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdvertisingExpense" xlink:to="us-gaap_AdvertisingExpense_lbl_2b2273" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdvertisingExpense_lbl_2b2273" xml:lang="en-US">Advertising expense</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetAndOperatingLeaseLiabilities" xlink:label="class_RightOfUseAssetAndOperatingLeaseLiabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetAndOperatingLeaseLiabilities" xlink:to="class_RightOfUseAssetAndOperatingLeaseLiabilities_lbl_e10c60" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetAndOperatingLeaseLiabilities_lbl_e10c60" xml:lang="en-US">Right-of-use asset and operating lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedBorrowingInterestRate" xlink:label="us-gaap_SubordinatedBorrowingInterestRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubordinatedBorrowingInterestRate" xlink:to="us-gaap_SubordinatedBorrowingInterestRate_lbl_651648" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubordinatedBorrowingInterestRate_lbl_651648" xml:lang="en-US">Incremental borrowing interest rate</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ProceedsFromBusinessCombinationTrustAccount" xlink:label="class_ProceedsFromBusinessCombinationTrustAccount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ProceedsFromBusinessCombinationTrustAccount" xlink:to="class_ProceedsFromBusinessCombinationTrustAccount_lbl_d8a4ad" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ProceedsFromBusinessCombinationTrustAccount_lbl_d8a4ad" xml:lang="en-US">Proceeds from business combination trust account</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StockIssuedDuringThisPeriodValueNewIssues" xlink:label="class_StockIssuedDuringThisPeriodValueNewIssues" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockIssuedDuringThisPeriodValueNewIssues" xlink:to="class_StockIssuedDuringThisPeriodValueNewIssues_lbl_70aaab" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StockIssuedDuringThisPeriodValueNewIssues_lbl_70aaab" xml:lang="en-US">New issues share value of Stock</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_InitialClosingBalance" xlink:label="class_InitialClosingBalance" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_InitialClosingBalance" xlink:to="class_InitialClosingBalance_lbl_76f976" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_InitialClosingBalance_lbl_76f976" xml:lang="en-US">Initial closing balance</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl_ae0a9f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl_ae0a9f" xml:lang="en-US">Long-Lived Tangible Asset [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RobotsMember" xlink:label="class_RobotsMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RobotsMember" xlink:to="class_RobotsMember_lbl_552b25" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RobotsMember_lbl_552b25" xml:lang="en-US">Robots [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerEquipmentMember" xlink:label="us-gaap_ComputerEquipmentMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComputerEquipmentMember" xlink:to="us-gaap_ComputerEquipmentMember_lbl_85bffc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComputerEquipmentMember_lbl_85bffc" xml:lang="en-US">Computers and electronic equipment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="us-gaap_FurnitureAndFixturesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesMember" xlink:to="us-gaap_FurnitureAndFixturesMember_lbl_7fd32d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl_7fd32d" xml:lang="en-US">Furniture and fixtures [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="us-gaap_LeaseholdImprovementsMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl_231a15" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl_231a15" xml:lang="en-US">Leasehold improvements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl_5c6c13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl_5c6c13" xml:lang="en-US">Total property and equipment</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LessAccumulatedDepreciation" xlink:label="class_LessAccumulatedDepreciation" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LessAccumulatedDepreciation" xlink:to="class_LessAccumulatedDepreciation_lbl_c3bd7d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LessAccumulatedDepreciation_lbl_c3bd7d" xml:lang="en-US">Less: accumulated depreciation</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl_045996" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl_045996" xml:lang="en-US">Total property and equipment, net</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl_1a6375" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Depreciation_lbl_1a6375" xml:lang="en-US">Depreciation expense</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_NumberOfSolanaPurchasedRestricted" xlink:label="class_NumberOfSolanaPurchasedRestricted" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_NumberOfSolanaPurchasedRestricted" xlink:to="class_NumberOfSolanaPurchasedRestricted_lbl_a406b4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_NumberOfSolanaPurchasedRestricted_lbl_a406b4" xml:lang="en-US">Number of Solana-purchased (restricted)</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_NumberOfSolanaStakingRewards" xlink:label="class_NumberOfSolanaStakingRewards" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_NumberOfSolanaStakingRewards" xlink:to="class_NumberOfSolanaStakingRewards_lbl_9829b7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_NumberOfSolanaStakingRewards_lbl_9829b7" xml:lang="en-US">Number of Solana- Staking rewards</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_NumberOfWorldcoinPurchased" xlink:label="class_NumberOfWorldcoinPurchased" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_NumberOfWorldcoinPurchased" xlink:to="class_NumberOfWorldcoinPurchased_lbl_61f8b8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_NumberOfWorldcoinPurchased_lbl_61f8b8" xml:lang="en-US">Number of Worldcoin-purchased</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_NumberOfWorldcoinStakingRewards" xlink:label="class_NumberOfWorldcoinStakingRewards" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_NumberOfWorldcoinStakingRewards" xlink:to="class_NumberOfWorldcoinStakingRewards_lbl_0f59f7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_NumberOfWorldcoinStakingRewards_lbl_0f59f7" xml:lang="en-US">Number of Worldcoin- Staking rewards</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CryptoAssetFairValueUnrestricted" xlink:label="us-gaap_CryptoAssetFairValueUnrestricted" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CryptoAssetFairValueUnrestricted" xlink:to="us-gaap_CryptoAssetFairValueUnrestricted_lbl_06828d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CryptoAssetFairValueUnrestricted_lbl_06828d" xml:lang="en-US">Crypto asset purchased carrying value</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInterestEarningAssets" xlink:to="us-gaap_OtherInterestEarningAssets_lbl_e08f19" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherInterestEarningAssets_lbl_e08f19" xml:lang="en-US">Staking rewards</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherInterestEarningAssets" xlink:label="us-gaap_OtherInterestEarningAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInterestEarningAssets" xlink:to="us-gaap_OtherInterestEarningAssets_lbl_7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherInterestEarningAssets_lbl_7" xml:lang="en-US">[Other Interest Earning Assets]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses" xlink:to="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses_lbl_8836c5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses_lbl_8836c5" xml:lang="en-US">Unrealized gain (loss) on crypto assets</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses" xlink:label="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses" xlink:to="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses_lbl_8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses_lbl_8" xml:lang="en-US">[Deferred Tax Assets, Unrealized Currency Losses]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherInvestments" xlink:label="us-gaap_OtherInvestments" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInvestments" xlink:to="us-gaap_OtherInvestments_lbl_9b6335" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherInvestments_lbl_9b6335" xml:lang="en-US">Total investment accounts</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CryptoAssetFairValue" xlink:label="us-gaap_CryptoAssetFairValue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CryptoAssetFairValue" xlink:to="us-gaap_CryptoAssetFairValue_lbl_4a2e07" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CryptoAssetFairValue_lbl_4a2e07" xml:lang="en-US">Digital assets with a fair value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PremiumsPercentageAssumedToNet" xlink:label="us-gaap_PremiumsPercentageAssumedToNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PremiumsPercentageAssumedToNet" xlink:to="us-gaap_PremiumsPercentageAssumedToNet_lbl_0fd169" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PremiumsPercentageAssumedToNet_lbl_0fd169" xml:lang="en-US">Net proceeds, percent</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl_6ba52d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl_6ba52d" xml:lang="en-US">2026</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl_52f02c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl_52f02c" xml:lang="en-US">2027</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl_32fc63" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl_32fc63" xml:lang="en-US">2028</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive_lbl_64dc3e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive_lbl_64dc3e" xml:lang="en-US">Remaining</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FiniteLivedIntangibleAssetsAmortizationExpense" xlink:to="class_FiniteLivedIntangibleAssetsAmortizationExpense_lbl_62d0de" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_FiniteLivedIntangibleAssetsAmortizationExpense_lbl_62d0de" xml:lang="en-US">Total</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FiniteLivedIntangibleAssetsAmortizationExpense" xlink:label="class_FiniteLivedIntangibleAssetsAmortizationExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FiniteLivedIntangibleAssetsAmortizationExpense" xlink:to="class_FiniteLivedIntangibleAssetsAmortizationExpense_lbl_6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FiniteLivedIntangibleAssetsAmortizationExpense_lbl_6" xml:lang="en-US">[Total]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl_789014" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl_789014" xml:lang="en-US">Related and Nonrelated Parties [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl_13cfb2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PlanNameAxis_lbl_13cfb2" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SilverRunGroupLLCMember" xlink:label="class_SilverRunGroupLLCMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SilverRunGroupLLCMember" xlink:to="class_SilverRunGroupLLCMember_lbl_5c088f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SilverRunGroupLLCMember_lbl_5c088f" xml:lang="en-US">Silver Run Group LLC [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_BottomMember" xlink:label="class_BottomMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_BottomMember" xlink:to="class_BottomMember_lbl_44acb2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_BottomMember_lbl_44acb2" xml:lang="en-US">Bottom [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TopMember" xlink:label="class_TopMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TopMember" xlink:to="class_TopMember_lbl_0b1dc2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TopMember_lbl_0b1dc2" xml:lang="en-US">Top [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsOfWhollyOwnedRealEstateInvestmentSubsidiaries" xlink:label="us-gaap_AssetsOfWhollyOwnedRealEstateInvestmentSubsidiaries" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsOfWhollyOwnedRealEstateInvestmentSubsidiaries" xlink:to="us-gaap_AssetsOfWhollyOwnedRealEstateInvestmentSubsidiaries_lbl_fcee23" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsOfWhollyOwnedRealEstateInvestmentSubsidiaries_lbl_fcee23" xml:lang="en-US">Owned subsidiary</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetAcquisitionConsiderationTransferredOtherAssets" xlink:label="us-gaap_AssetAcquisitionConsiderationTransferredOtherAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetAcquisitionConsiderationTransferredOtherAssets" xlink:to="us-gaap_AssetAcquisitionConsiderationTransferredOtherAssets_lbl_df0419" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetAcquisitionConsiderationTransferredOtherAssets_lbl_df0419" xml:lang="en-US">Total consideration</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesGross" xlink:to="us-gaap_PaymentsToAcquireBusinessesGross_lbl_84cbec" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireBusinessesGross_lbl_84cbec" xml:lang="en-US">Cash consideration</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl_a04c15" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl_a04c15" xml:lang="en-US">Common stock, par value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseImpairmentLoss" xlink:label="us-gaap_FinanceLeaseImpairmentLoss" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseImpairmentLoss" xlink:to="us-gaap_FinanceLeaseImpairmentLoss_lbl_9e47bb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinanceLeaseImpairmentLoss_lbl_9e47bb" xml:lang="en-US">Impairment loss</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantsToPurchaseSharesOfCommonStock" xlink:label="class_WarrantsToPurchaseSharesOfCommonStock" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantsToPurchaseSharesOfCommonStock" xlink:to="class_WarrantsToPurchaseSharesOfCommonStock_lbl_d2bc61" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantsToPurchaseSharesOfCommonStock_lbl_d2bc61" xml:lang="en-US">Warrants to purchase shares of common stock</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantExercisePriceDecrease" xlink:label="us-gaap_WarrantExercisePriceDecrease" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantExercisePriceDecrease" xlink:to="us-gaap_WarrantExercisePriceDecrease_lbl_93a44b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantExercisePriceDecrease_lbl_93a44b" xml:lang="en-US">Warrants exercise price</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableInterestEntityOwnershipPercentage" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableInterestEntityOwnershipPercentage" xlink:to="us-gaap_VariableInterestEntityOwnershipPercentage_lbl_b436db" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage_lbl_b436db" xml:lang="en-US">Ownership percentage</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WorkersCompensationDiscountPercent" xlink:label="us-gaap_WorkersCompensationDiscountPercent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WorkersCompensationDiscountPercent" xlink:to="us-gaap_WorkersCompensationDiscountPercent_lbl_9ab88f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WorkersCompensationDiscountPercent_lbl_9ab88f" xml:lang="en-US">Discount rate</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ShareBasedGoodsAndNonemployeeServicesTransactionValuationsMethodExpectedTerm1" xlink:label="class_ShareBasedGoodsAndNonemployeeServicesTransactionValuationsMethodExpectedTerm1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ShareBasedGoodsAndNonemployeeServicesTransactionValuationsMethodExpectedTerm1" xlink:to="class_ShareBasedGoodsAndNonemployeeServicesTransactionValuationsMethodExpectedTerm1_lbl_0a5a62" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ShareBasedGoodsAndNonemployeeServicesTransactionValuationsMethodExpectedTerm1_lbl_0a5a62" xml:lang="en-US">Expected term</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl_768a8b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl_768a8b" xml:lang="en-US">Common stock, issued</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl_e46d84" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_lbl_e46d84" xml:lang="en-US">Common stock value</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ExpectedVolatilityoflineofcreditfacility" xlink:label="class_ExpectedVolatilityoflineofcreditfacility" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ExpectedVolatilityoflineofcreditfacility" xlink:to="class_ExpectedVolatilityoflineofcreditfacility_lbl_76901d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ExpectedVolatilityoflineofcreditfacility_lbl_76901d" xml:lang="en-US">Expected volatility</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RiskFreeInterestRate" xlink:label="class_RiskFreeInterestRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RiskFreeInterestRate" xlink:to="class_RiskFreeInterestRate_lbl_3b6085" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RiskFreeInterestRate_lbl_3b6085" xml:lang="en-US">Risk-free interest rate</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DividendYield" xlink:label="class_DividendYield" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DividendYield" xlink:to="class_DividendYield_lbl_3f78d0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DividendYield_lbl_3f78d0" xml:lang="en-US">Dividend yield</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebtExcludingAmortization" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDebtExcludingAmortization" xlink:to="us-gaap_InterestExpenseDebtExcludingAmortization_lbl_897793" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl_897793" xml:lang="en-US">Amortization expense</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommunicationsAndInformationTechnology" xlink:label="us-gaap_CommunicationsAndInformationTechnology" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommunicationsAndInformationTechnology" xlink:to="us-gaap_CommunicationsAndInformationTechnology_lbl_ce7d27" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommunicationsAndInformationTechnology_lbl_ce7d27" xml:lang="en-US">Patented technology</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FairValueOfTheWarrants" xlink:label="class_FairValueOfTheWarrants" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FairValueOfTheWarrants" xlink:to="class_FairValueOfTheWarrants_lbl_72dc4a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FairValueOfTheWarrants_lbl_72dc4a" xml:lang="en-US">Fair value of the warrants</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionRate" xlink:label="us-gaap_RelatedPartyTransactionRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionRate" xlink:to="us-gaap_RelatedPartyTransactionRate_lbl_631527" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionRate_lbl_631527" xml:lang="en-US">Royalty rates range</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl_4a08ee" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl_4a08ee" xml:lang="en-US">2026</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl_2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl_2" xml:lang="en-US">[Lessee, Operating Lease, Liability, to be Paid, Year Two]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl_528309" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl_528309" xml:lang="en-US">2027</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl_3" xml:lang="en-US">[Lessee, Operating Lease, Liability, to be Paid, Year Three]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl_0c7ef3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl_0c7ef3" xml:lang="en-US">2028</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl_4" xml:lang="en-US">[Lessee, Operating Lease, Liability, to be Paid, Year Four]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_lbl_561f84" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_lbl_561f84" xml:lang="en-US">Remaining</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_lbl_5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive_lbl_5" xml:lang="en-US">[Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LesseeOperatingFutureLeaseLiabilityPaymentsDue" xlink:label="class_LesseeOperatingFutureLeaseLiabilityPaymentsDue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LesseeOperatingFutureLeaseLiabilityPaymentsDue" xlink:to="class_LesseeOperatingFutureLeaseLiabilityPaymentsDue_lbl_b47186" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LesseeOperatingFutureLeaseLiabilityPaymentsDue_lbl_b47186" xml:lang="en-US">Total future lease payments</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LessInterest" xlink:label="class_LessInterest" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LessInterest" xlink:to="class_LessInterest_lbl_2c426e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LessInterest_lbl_2c426e" xml:lang="en-US">Less: Interest</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl_c674ed" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLiability_lbl_c674ed" xml:lang="en-US">Present value of lease liabilities</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearTwo" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearTwo_lbl_559908" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearTwo_lbl_559908" xml:lang="en-US">2026</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetsFutureAmortizationDueYearTwo" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearTwo" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearTwo" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearTwo_lbl_2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearTwo_lbl_2" xml:lang="en-US">[2026]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearThree" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearThree_lbl_9f6a4f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearThree_lbl_9f6a4f" xml:lang="en-US">2027</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetsFutureAmortizationDueYearThree" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearThree" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearThree" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearThree_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearThree_lbl_3" xml:lang="en-US">[2027]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearFour" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearFour_lbl_e555e0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearFour_lbl_e555e0" xml:lang="en-US">2028</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetsFutureAmortizationDueYearFour" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearFour" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueYearFour" xlink:to="class_RightOfUseAssetsFutureAmortizationDueYearFour_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetsFutureAmortizationDueYearFour_lbl_4" xml:lang="en-US">[2028]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear" xlink:to="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear_lbl_8be752" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear_lbl_8be752" xml:lang="en-US">Remaining</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear" xlink:label="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear" xlink:to="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear_lbl_5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetsFutureAmortizationDueRemainderOfFiscalYear_lbl_5" xml:lang="en-US">[Remaining]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDue" xlink:to="class_RightOfUseAssetsFutureAmortizationDue_lbl_7441b3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetsFutureAmortizationDue_lbl_7441b3" xml:lang="en-US">Total</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RightOfUseAssetsFutureAmortizationDue" xlink:label="class_RightOfUseAssetsFutureAmortizationDue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetsFutureAmortizationDue" xlink:to="class_RightOfUseAssetsFutureAmortizationDue_lbl_6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RightOfUseAssetsFutureAmortizationDue_lbl_6" xml:lang="en-US">[Total 1]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl_8636f1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl_8636f1" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DreamGoMember" xlink:label="class_DreamGoMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DreamGoMember" xlink:to="class_DreamGoMember_lbl_6997eb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DreamGoMember_lbl_6997eb" xml:lang="en-US">Dream Go [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LeaseAndRentalExpenses" xlink:label="class_LeaseAndRentalExpenses" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LeaseAndRentalExpenses" xlink:to="class_LeaseAndRentalExpenses_lbl_d2c3b6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LeaseAndRentalExpenses_lbl_d2c3b6" xml:lang="en-US">Rent expense</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubleaseIncome" xlink:label="us-gaap_SubleaseIncome" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubleaseIncome" xlink:to="us-gaap_SubleaseIncome_lbl_283726" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubleaseIncome_lbl_283726" xml:lang="en-US">Income from subleases</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RightOfUseAssetAndOperatingLeaseLiabilities" xlink:to="class_RightOfUseAssetAndOperatingLeaseLiabilities_lbl_df556c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RightOfUseAssetAndOperatingLeaseLiabilities_lbl_df556c" xml:lang="en-US">Right-of-use asset and operating lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding" xlink:label="us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding" xlink:to="us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding_lbl_1f87e7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtorInPossessionFinancingInterestRateOnBorrowingsOutstanding_lbl_1f87e7" xml:lang="en-US">Borrowing rate</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LesseeOperatingLeaseRemainingLeaseTerms" xlink:label="class_LesseeOperatingLeaseRemainingLeaseTerms" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LesseeOperatingLeaseRemainingLeaseTerms" xlink:to="class_LesseeOperatingLeaseRemainingLeaseTerms_lbl_97f6b3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LesseeOperatingLeaseRemainingLeaseTerms_lbl_97f6b3" xml:lang="en-US">Remaining lease term</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="us-gaap_ShortTermDebtTypeAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl_4b1a16" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl_4b1a16" xml:lang="en-US">Short-Term Debt, Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CreditCardPayableMember" xlink:label="class_CreditCardPayableMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CreditCardPayableMember" xlink:to="class_CreditCardPayableMember_lbl_98691f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CreditCardPayableMember_lbl_98691f" xml:lang="en-US">Credit card payable [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PayrollTaxPayableMember" xlink:label="class_PayrollTaxPayableMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PayrollTaxPayableMember" xlink:to="class_PayrollTaxPayableMember_lbl_7c53af" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PayrollTaxPayableMember_lbl_7c53af" xml:lang="en-US">Payroll tax payable [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_OtherAccountsPayableAndAccruedLiabilities_lbl_d83ae0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherAccountsPayableAndAccruedLiabilities_lbl_d83ae0" xml:lang="en-US">Accrued liabilities and other payables</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_OtherAccountsPayableAndAccruedLiabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_OtherAccountsPayableAndAccruedLiabilities_lbl_2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccountsPayableAndAccruedLiabilities_lbl_2" xml:lang="en-US">[Other Accounts Payable and Accrued Liabilities]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl_0b990d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl_0b990d" xml:lang="en-US">Deferred income tax expense</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl_f84f90" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl_f84f90" xml:lang="en-US">Current income tax expense</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalIncomeTaxExpenseBenefit" xlink:to="class_TotalIncomeTaxExpenseBenefit_lbl_7a20b8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_TotalIncomeTaxExpenseBenefit_lbl_7a20b8" xml:lang="en-US">Total</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalIncomeTaxExpenseBenefit" xlink:label="class_TotalIncomeTaxExpenseBenefit" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalIncomeTaxExpenseBenefit" xlink:to="class_TotalIncomeTaxExpenseBenefit_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalIncomeTaxExpenseBenefit_lbl_4" xml:lang="en-US">[Total 2]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="us-gaap_OperatingLossCarryforwards" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwards" xlink:to="us-gaap_OperatingLossCarryforwards_lbl_c06c37" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLossCarryforwards_lbl_c06c37" xml:lang="en-US">Net operating loss carryforwards</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalChangeInFairValueOfCryptoAssets" xlink:to="class_TotalChangeInFairValueOfCryptoAssets_lbl_695c73" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_TotalChangeInFairValueOfCryptoAssets_lbl_695c73" xml:lang="en-US">Change in fair value of crypto assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalChangeInFairValueOfCryptoAssets" xlink:label="class_TotalChangeInFairValueOfCryptoAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalChangeInFairValueOfCryptoAssets" xlink:to="class_TotalChangeInFairValueOfCryptoAssets_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalChangeInFairValueOfCryptoAssets_lbl_3" xml:lang="en-US">[Change in fair value of crypto assets]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ChangeInFairValueOfConvertibleDebt" xlink:to="class_ChangeInFairValueOfConvertibleDebt_lbl_204eea" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_ChangeInFairValueOfConvertibleDebt_lbl_204eea" xml:lang="en-US">Change in fair value of convertible debt</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ChangeInFairValueOfConvertibleDebt" xlink:label="class_ChangeInFairValueOfConvertibleDebt" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ChangeInFairValueOfConvertibleDebt" xlink:to="class_ChangeInFairValueOfConvertibleDebt_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ChangeInFairValueOfConvertibleDebt_lbl_4" xml:lang="en-US">[Change in fair value of convertible debt]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets" xlink:label="us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets" xlink:to="us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets_lbl_5dbe5f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmountOfImpairmentToCarryingAmountOfRegulatoryAssets_lbl_5dbe5f" xml:lang="en-US">Impairment loss on intangible assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_OtherExpenseTemporaryDifference" xlink:label="class_OtherExpenseTemporaryDifference" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_OtherExpenseTemporaryDifference" xlink:to="class_OtherExpenseTemporaryDifference_lbl_100179" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_OtherExpenseTemporaryDifference_lbl_100179" xml:lang="en-US">Other expense temporary difference</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="us-gaap_DeferredTaxAssetsNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl_6baee7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl_6baee7" xml:lang="en-US">Total deferred tax assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalDeferredTaxLiabilities" xlink:label="class_TotalDeferredTaxLiabilities" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalDeferredTaxLiabilities" xlink:to="class_TotalDeferredTaxLiabilities_lbl_678b67" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalDeferredTaxLiabilities_lbl_678b67" xml:lang="en-US">Deferred tax liability- Depreciation</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl_dc3c17" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl_dc3c17" xml:lang="en-US">Allowance</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl_9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl_9" xml:lang="en-US">[Deferred Tax Assets, Valuation Allowance]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl_f67c0f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl_f67c0f" xml:lang="en-US">Net deferred tax liability</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl_89d8f1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl_89d8f1" xml:lang="en-US">Federal statutory tax rate</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_lbl_e8973c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_lbl_e8973c" xml:lang="en-US">Nondeductible expense</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl_fc53e1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl_fc53e1" xml:lang="en-US">Valuation allowance</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl_7b0e01" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl_7b0e01" xml:lang="en-US">Effective income tax rate</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassoverHoldingsIncMember" xlink:label="class_ClassoverHoldingsIncMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassoverHoldingsIncMember" xlink:to="class_ClassoverHoldingsIncMember_lbl_85a5b7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassoverHoldingsIncMember_lbl_85a5b7" xml:lang="en-US">Classover Holdings, Inc [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FederalOperatingLossCarryforwardsNet" xlink:label="class_FederalOperatingLossCarryforwardsNet" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FederalOperatingLossCarryforwardsNet" xlink:to="class_FederalOperatingLossCarryforwardsNet_lbl_4e4f32" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FederalOperatingLossCarryforwardsNet_lbl_4e4f32" xml:lang="en-US">Federal net operating loss carryforwards</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DreamLegalGroupIncMember" xlink:label="class_DreamLegalGroupIncMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DreamLegalGroupIncMember" xlink:to="class_DreamLegalGroupIncMember_lbl_e4a2dc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DreamLegalGroupIncMember_lbl_e4a2dc" xml:lang="en-US">Dream Legal Group, Inc. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DueFromRelatedPartyTransactionAmountsOfTransaction" xlink:label="class_DueFromRelatedPartyTransactionAmountsOfTransaction" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DueFromRelatedPartyTransactionAmountsOfTransaction" xlink:to="class_DueFromRelatedPartyTransactionAmountsOfTransaction_lbl_973b0c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DueFromRelatedPartyTransactionAmountsOfTransaction_lbl_973b0c" xml:lang="en-US">Total due from related parties</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DreamGoIncMember" xlink:label="class_DreamGoIncMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DreamGoIncMember" xlink:to="class_DreamGoIncMember_lbl_0aa5ef" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DreamGoIncMember_lbl_0aa5ef" xml:lang="en-US">Dream Go Inc. [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DueToRelatedPartyTransactionAmountsOfTransaction" xlink:label="class_DueToRelatedPartyTransactionAmountsOfTransaction" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DueToRelatedPartyTransactionAmountsOfTransaction" xlink:to="class_DueToRelatedPartyTransactionAmountsOfTransaction_lbl_f9b2dd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DueToRelatedPartyTransactionAmountsOfTransaction_lbl_f9b2dd" xml:lang="en-US">Total due to related parties - current</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_YiLiuMember" xlink:label="class_YiLiuMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_YiLiuMember" xlink:to="class_YiLiuMember_lbl_43250c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_YiLiuMember_lbl_43250c" xml:lang="en-US">Yi Liu [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LuoHuiMember" xlink:label="class_LuoHuiMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LuoHuiMember" xlink:to="class_LuoHuiMember_lbl_b552f2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LuoHuiMember_lbl_b552f2" xml:lang="en-US">Luo Hui [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RelatedPartyTransactions" xlink:label="class_RelatedPartyTransactions" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactions" xlink:to="class_RelatedPartyTransactions_lbl_713d34" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RelatedPartyTransactions_lbl_713d34" xml:lang="en-US">Related party transactions</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactionAmountsOfTransactionRentExpense" xlink:to="class_RelatedPartyTransactionAmountsOfTransactionRentExpense_lbl_205859" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionRentExpense_lbl_205859" xml:lang="en-US">Rent expense</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RelatedPartyTransactionAmountsOfTransactionRentExpense" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionRentExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactionAmountsOfTransactionRentExpense" xlink:to="class_RelatedPartyTransactionAmountsOfTransactionRentExpense_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionRentExpense_lbl_3" xml:lang="en-US">[Rent expense]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RelatedPartyTransactionAmountsOfTransactionInterestExpense" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionInterestExpense" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactionAmountsOfTransactionInterestExpense" xlink:to="class_RelatedPartyTransactionAmountsOfTransactionInterestExpense_lbl_4eb9ff" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionInterestExpense_lbl_4eb9ff" xml:lang="en-US">Interest expense</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RelatedPartyTransactionAmountsOfTransactionSubleaseIncome" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionSubleaseIncome" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RelatedPartyTransactionAmountsOfTransactionSubleaseIncome" xlink:to="class_RelatedPartyTransactionAmountsOfTransactionSubleaseIncome_lbl_023d4d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RelatedPartyTransactionAmountsOfTransactionSubleaseIncome_lbl_023d4d" xml:lang="en-US">Sublease income</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl_b7eded" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl_b7eded" xml:lang="en-US">ROU assets</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ShortTermObligationUnderOperatingLeases" xlink:label="class_ShortTermObligationUnderOperatingLeases" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ShortTermObligationUnderOperatingLeases" xlink:to="class_ShortTermObligationUnderOperatingLeases_lbl_0fe732" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ShortTermObligationUnderOperatingLeases_lbl_0fe732" xml:lang="en-US">Short term obligation under operating leases</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl_f77b24" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl_f77b24" xml:lang="en-US">Long term obligation under operating leases</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:to="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl_4" xml:lang="en-US">[Long-Term Debt and Lease Obligation]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DebtInstrumentIssuancesDate" xlink:label="class_DebtInstrumentIssuancesDate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DebtInstrumentIssuancesDate" xlink:to="class_DebtInstrumentIssuancesDate_lbl_1e0aea" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DebtInstrumentIssuancesDate_lbl_1e0aea" xml:lang="en-US">Issue date</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl_5d792f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl_5d792f" xml:lang="en-US">Face Value</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DebtInstrumentsMaturityDate" xlink:label="class_DebtInstrumentsMaturityDate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DebtInstrumentsMaturityDate" xlink:to="class_DebtInstrumentsMaturityDate_lbl_2ba7bc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DebtInstrumentsMaturityDate_lbl_2ba7bc" xml:lang="en-US">Maturity date</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateDuringPeriod" xlink:to="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl_2cd4d3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl_2cd4d3" xml:lang="en-US">Interest rate</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl_39a7f1" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl_39a7f1" xml:lang="en-US">Conversion Price</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConvertibleDebtFloorPricePerShare" xlink:label="class_ConvertibleDebtFloorPricePerShare" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConvertibleDebtFloorPricePerShare" xlink:to="class_ConvertibleDebtFloorPricePerShare_lbl_5238a0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConvertibleDebtFloorPricePerShare_lbl_5238a0" xml:lang="en-US">Floor Price</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DebtInstrumentRedemptionTerms" xlink:label="class_DebtInstrumentRedemptionTerms" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DebtInstrumentRedemptionTerms" xlink:to="class_DebtInstrumentRedemptionTerms_lbl_d84a90" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DebtInstrumentRedemptionTerms_lbl_d84a90" xml:lang="en-US">Redemption terms</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_UseOfProceeds" xlink:label="class_UseOfProceeds" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_UseOfProceeds" xlink:to="class_UseOfProceeds_lbl_580b7d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_UseOfProceeds_lbl_580b7d" xml:lang="en-US">Use of Proceeds</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl_fc926d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl_fc926d" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl_4785fc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl_4785fc" xml:lang="en-US">Level 3 [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl_33c767" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl_33c767" xml:lang="en-US">Face value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTermOfContract" xlink:label="us-gaap_DerivativeTermOfContract" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeTermOfContract" xlink:to="us-gaap_DerivativeTermOfContract_lbl_56412c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeTermOfContract_lbl_56412c" xml:lang="en-US">Remaining contractual term</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFairValue" xlink:to="us-gaap_DebtInstrumentFairValue_lbl_950519" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFairValue_lbl_950519" xml:lang="en-US">Fair value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeVolatilityRate" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeVolatilityRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeVolatilityRate" xlink:to="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeVolatilityRate_lbl_c3b267" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeVolatilityRate_lbl_c3b267" xml:lang="en-US">Volatility</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFloorInterestRate" xlink:label="us-gaap_DerivativeFloorInterestRate" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFloorInterestRate" xlink:to="us-gaap_DerivativeFloorInterestRate_lbl_f51505" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeFloorInterestRate_lbl_f51505" xml:lang="en-US">Risk-free rate</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentInterestRatePaidInKind" xlink:to="us-gaap_InvestmentInterestRatePaidInKind_lbl_98380c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentInterestRatePaidInKind_lbl_98380c" xml:lang="en-US">PIK interest rate</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare" xlink:label="us-gaap_SaleOfStockPricePerShare" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPricePerShare" xlink:to="us-gaap_SaleOfStockPricePerShare_lbl_d1f4d8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl_d1f4d8" xml:lang="en-US">Stock price</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentConvertibleConversionPrice1" xlink:to="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl_f97e1a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl_f97e1a" xml:lang="en-US">Conversion price (floor)</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RedemptionPremiumPercent" xlink:label="class_RedemptionPremiumPercent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RedemptionPremiumPercent" xlink:to="class_RedemptionPremiumPercent_lbl_b4d80a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RedemptionPremiumPercent_lbl_b4d80a" xml:lang="en-US">Redemption premium</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FairValueBeginningBalance" xlink:label="class_FairValueBeginningBalance" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FairValueBeginningBalance" xlink:to="class_FairValueBeginningBalance_lbl_86d8b6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FairValueBeginningBalance_lbl_86d8b6" xml:lang="en-US">Fair value beginning balance</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_InitialRecognitionAtPrincipalAmount" xlink:label="class_InitialRecognitionAtPrincipalAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_InitialRecognitionAtPrincipalAmount" xlink:to="class_InitialRecognitionAtPrincipalAmount_lbl_e314ed" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_InitialRecognitionAtPrincipalAmount_lbl_e314ed" xml:lang="en-US">Initial recognition at principal amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:label="us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:to="us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_lbl_2f10ea" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_lbl_2f10ea" xml:lang="en-US">Changes in fair value recognized in earnings</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertiblePreferredDividendsNetOfTax" xlink:to="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl_d18645" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl_d18645" xml:lang="en-US">Conversion into common and preferred stock</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredDividendsNetOfTax" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertiblePreferredDividendsNetOfTax" xlink:to="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl_5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertiblePreferredDividendsNetOfTax_lbl_5" xml:lang="en-US">[Convertible Preferred Dividends, Net of Tax]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FairValueEndingBalance" xlink:label="class_FairValueEndingBalance" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FairValueEndingBalance" xlink:to="class_FairValueEndingBalance_lbl_9667ab" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FairValueEndingBalance_lbl_9667ab" xml:lang="en-US">Fair value ending balance</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TopMember" xlink:to="class_TopMember_lbl_8ea8cf" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_TopMember_lbl_8ea8cf" xml:lang="en-US">Top [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_AggregatePrincipalAmount" xlink:label="class_AggregatePrincipalAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_AggregatePrincipalAmount" xlink:to="class_AggregatePrincipalAmount_lbl_a5bdb6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_AggregatePrincipalAmount_lbl_a5bdb6" xml:lang="en-US">Aggregate principal amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl_d6d52f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl_d6d52f" xml:lang="en-US">Proceeds from issuance of convertible notes</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl_306342" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl_306342" xml:lang="en-US">Interest rate</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl_4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl_4" xml:lang="en-US">[Debt Instrument, Basis Spread on Variable Rate]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractualObligation" xlink:label="us-gaap_ContractualObligation" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractualObligation" xlink:to="us-gaap_ContractualObligation_lbl_710624" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ContractualObligation_lbl_710624" xml:lang="en-US">Aggregate contractual principal amount</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_IncreaseInExpectedVolatilityMaximum" xlink:label="class_IncreaseInExpectedVolatilityMaximum" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseInExpectedVolatilityMaximum" xlink:to="class_IncreaseInExpectedVolatilityMaximum_lbl_0c8dc3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_IncreaseInExpectedVolatilityMaximum_lbl_0c8dc3" xml:lang="en-US">Increase in expected volatility Maximum</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DecreaseInExpectedVolatilityMinimum" xlink:label="class_DecreaseInExpectedVolatilityMinimum" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DecreaseInExpectedVolatilityMinimum" xlink:to="class_DecreaseInExpectedVolatilityMinimum_lbl_676660" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DecreaseInExpectedVolatilityMinimum_lbl_676660" xml:lang="en-US">Decrease in expected volatility minimum</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FairValueDecrease" xlink:label="class_FairValueDecrease" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FairValueDecrease" xlink:to="class_FairValueDecrease_lbl_4c72cd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FairValueDecrease_lbl_4c72cd" xml:lang="en-US">Fair value decrease</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FairValueIncrease" xlink:label="class_FairValueIncrease" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FairValueIncrease" xlink:to="class_FairValueIncrease_lbl_dfdcde" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FairValueIncrease_lbl_dfdcde" xml:lang="en-US">Fair value increase</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_IncreaseInExpectedVolatilityMinimum" xlink:label="class_IncreaseInExpectedVolatilityMinimum" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_IncreaseInExpectedVolatilityMinimum" xlink:to="class_IncreaseInExpectedVolatilityMinimum_lbl_d7fdf6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_IncreaseInExpectedVolatilityMinimum_lbl_d7fdf6" xml:lang="en-US">Increase in expected volatility minimum</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DecreaseInExpectedVolatilityMaximum" xlink:label="class_DecreaseInExpectedVolatilityMaximum" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DecreaseInExpectedVolatilityMaximum" xlink:to="class_DecreaseInExpectedVolatilityMaximum_lbl_48c49d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DecreaseInExpectedVolatilityMaximum_lbl_48c49d" xml:lang="en-US">Decrease in expected volatility maximum</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConversionPriceFloor" xlink:to="class_ConversionPriceFloor_lbl_1359cd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_ConversionPriceFloor_lbl_1359cd" xml:lang="en-US">Conversion price (floor)</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConversionPriceFloor" xlink:label="class_ConversionPriceFloor" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConversionPriceFloor" xlink:to="class_ConversionPriceFloor_lbl_12" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConversionPriceFloor_lbl_12" xml:lang="en-US">[Conversion price (floor)]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LowerConversionPricePercent" xlink:label="class_LowerConversionPricePercent" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LowerConversionPricePercent" xlink:to="class_LowerConversionPricePercent_lbl_5c273a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LowerConversionPricePercent_lbl_5c273a" xml:lang="en-US">Lower conversion price percent</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl_4efe13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl_4efe13" xml:lang="en-US">Convertible Notes issued</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConversionNotesAmount" xlink:label="class_ConversionNotesAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConversionNotesAmount" xlink:to="class_ConversionNotesAmount_lbl_676ec2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConversionNotesAmount_lbl_676ec2" xml:lang="en-US">Conversion notes amount</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockSharesConverted1" xlink:to="us-gaap_ConversionOfStockSharesConverted1_lbl_8db17a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl_8db17a" xml:lang="en-US">Converted shares</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockSplits" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockSplits" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockSplits" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockSplits_lbl_0427f2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockSplits_lbl_0427f2" xml:lang="en-US">Pre-split basis shares</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockIssuedDuringPeriodValueConversionsOfUnits" xlink:to="class_StockIssuedDuringPeriodValueConversionsOfUnits_lbl_48f6c0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_StockIssuedDuringPeriodValueConversionsOfUnits_lbl_48f6c0" xml:lang="en-US">Fair value conversion</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_StockIssuedDuringPeriodValueConversionsOfUnits" xlink:label="class_StockIssuedDuringPeriodValueConversionsOfUnits" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_StockIssuedDuringPeriodValueConversionsOfUnits" xlink:to="class_StockIssuedDuringPeriodValueConversionsOfUnits_lbl_18" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_StockIssuedDuringPeriodValueConversionsOfUnits_lbl_18" xml:lang="en-US">[Fair value conversion]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl_a81283" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl_a81283" xml:lang="en-US">Fair value conversion</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantLiability" xlink:to="class_WarrantLiability_lbl_48993e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="class_WarrantLiability_lbl_48993e" xml:lang="en-US">Fair value as of December 31, 2025</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantLiability" xlink:label="class_WarrantLiability" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantLiability" xlink:to="class_WarrantLiability_lbl_2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantLiability_lbl_2" xml:lang="en-US">[Fair value as of December 31, 2025]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ChangeInFairValueOfWarrantLiability" xlink:label="class_ChangeInFairValueOfWarrantLiability" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ChangeInFairValueOfWarrantLiability" xlink:to="class_ChangeInFairValueOfWarrantLiability_lbl_4e2f58" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ChangeInFairValueOfWarrantLiability_lbl_4e2f58" xml:lang="en-US">Change in fair value</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantLiability" xlink:to="class_WarrantLiability_lbl_2388bc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="class_WarrantLiability_lbl_2388bc" xml:lang="en-US">Fair value as of March 31, 2026</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateAxis" xlink:label="us-gaap_AwardDateAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateAxis_lbl_b019d3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardDateAxis_lbl_b019d3" xml:lang="en-US">Award Date [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_MarchThirtyOneTwentyTwentySixMember" xlink:label="class_MarchThirtyOneTwentyTwentySixMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_MarchThirtyOneTwentyTwentySixMember" xlink:to="class_MarchThirtyOneTwentyTwentySixMember_lbl_acfb44" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_MarchThirtyOneTwentyTwentySixMember_lbl_acfb44" xml:lang="en-US">March 31, 2026 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl_abaaa5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl_abaaa5" xml:lang="en-US">Warrants outstanding</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl_9a1924" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl_9a1924" xml:lang="en-US">Exercise price</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassOfWarrantOrRightRedemptionPrice" xlink:label="class_ClassOfWarrantOrRightRedemptionPrice" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassOfWarrantOrRightRedemptionPrice" xlink:to="class_ClassOfWarrantOrRightRedemptionPrice_lbl_6c306f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassOfWarrantOrRightRedemptionPrice_lbl_6c306f" xml:lang="en-US">Redemption price</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantIssued" xlink:label="class_WarrantIssued" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantIssued" xlink:to="class_WarrantIssued_lbl_e9ad23" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantIssued_lbl_e9ad23" xml:lang="en-US">Warrant issued</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_LastSalePriceOfOrdinaryShares" xlink:label="class_LastSalePriceOfOrdinaryShares" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LastSalePriceOfOrdinaryShares" xlink:to="class_LastSalePriceOfOrdinaryShares_lbl_063df9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LastSalePriceOfOrdinaryShares_lbl_063df9" xml:lang="en-US">Last sale price of ordinary shares</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_NewlyIssuedPrice" xlink:label="class_NewlyIssuedPrice" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_NewlyIssuedPrice" xlink:to="class_NewlyIssuedPrice_lbl_85e062" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_NewlyIssuedPrice_lbl_85e062" xml:lang="en-US">Newly issued price</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PercentOfAggregateGrossProceedsFromIssuances" xlink:label="class_PercentOfAggregateGrossProceedsFromIssuances" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PercentOfAggregateGrossProceedsFromIssuances" xlink:to="class_PercentOfAggregateGrossProceedsFromIssuances_lbl_a58b1f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PercentOfAggregateGrossProceedsFromIssuances_lbl_a58b1f" xml:lang="en-US">Percent of aggregate gross proceeds from issuances</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantAdjustedPercentage" xlink:label="class_WarrantAdjustedPercentage" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantAdjustedPercentage" xlink:to="class_WarrantAdjustedPercentage_lbl_caca2e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantAdjustedPercentage_lbl_caca2e" xml:lang="en-US">Warrant adjusted percentage</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl_c2d021" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl_c2d021" xml:lang="en-US">Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CryptoAssetMember" xlink:label="class_CryptoAssetMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CryptoAssetMember" xlink:to="class_CryptoAssetMember_lbl_c4033f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CryptoAssetMember_lbl_c4033f" xml:lang="en-US">Crypto Asset [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl_268377" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl_268377" xml:lang="en-US">Level 2 [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl_102e34" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl_102e34" xml:lang="en-US">Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleNotesPayableMember" xlink:label="us-gaap_ConvertibleNotesPayableMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleNotesPayableMember" xlink:to="us-gaap_ConvertibleNotesPayableMember_lbl_6e4fd0" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleNotesPayableMember_lbl_6e4fd0" xml:lang="en-US">Convertible Notes Payable [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantLiabilitiesMember" xlink:label="class_WarrantLiabilitiesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantLiabilitiesMember" xlink:to="class_WarrantLiabilitiesMember_lbl_874fe4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantLiabilitiesMember_lbl_874fe4" xml:lang="en-US">WarrantLiabilities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl_91df4f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl_91df4f" xml:lang="en-US">Assets, Fair Value Disclosure</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl_ee4adf" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl_ee4adf" xml:lang="en-US">Warrant liabilities</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="us-gaap_LiabilitiesFairValueDisclosure" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl_3" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl_3" xml:lang="en-US">[Liabilities, Fair Value Disclosure]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOperatingActivitiesSegmentAxis" xlink:to="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl_23ef24" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl_23ef24" xml:lang="en-US">Operating Activities [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TimeBasedSubscriptionsMember" xlink:label="class_TimeBasedSubscriptionsMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TimeBasedSubscriptionsMember" xlink:to="class_TimeBasedSubscriptionsMember_lbl_ea145a" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TimeBasedSubscriptionsMember_lbl_ea145a" xml:lang="en-US">Time-based subscriptions [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CreditBasedSubscriptionsMember" xlink:label="class_CreditBasedSubscriptionsMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CreditBasedSubscriptionsMember" xlink:to="class_CreditBasedSubscriptionsMember_lbl_0cef34" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CreditBasedSubscriptionsMember_lbl_0cef34" xml:lang="en-US">Credit-based subscriptions [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl_9005f5" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Revenues_lbl_9005f5" xml:lang="en-US">Total revenues</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalClassACommonSharesMember" xlink:label="class_TotalClassACommonSharesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalClassACommonSharesMember" xlink:to="class_TotalClassACommonSharesMember_lbl_01c95b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalClassACommonSharesMember_lbl_01c95b" xml:lang="en-US">Total Class A common shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConvertibleNoteHoldersOfClassoverIncPriorToMergerClassBMember" xlink:label="class_ConvertibleNoteHoldersOfClassoverIncPriorToMergerClassBMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConvertibleNoteHoldersOfClassoverIncPriorToMergerClassBMember" xlink:to="class_ConvertibleNoteHoldersOfClassoverIncPriorToMergerClassBMember_lbl_4e916d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConvertibleNoteHoldersOfClassoverIncPriorToMergerClassBMember_lbl_4e916d" xml:lang="en-US">Convertible note holders of Classover Inc. prior to merger - Class B [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_HoldersOfBFACPublicShareholdersClassBMember" xlink:label="class_HoldersOfBFACPublicShareholdersClassBMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_HoldersOfBFACPublicShareholdersClassBMember" xlink:to="class_HoldersOfBFACPublicShareholdersClassBMember_lbl_0afcd8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_HoldersOfBFACPublicShareholdersClassBMember_lbl_0afcd8" xml:lang="en-US">Holders of BFAC public shareholders - Class B [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_MarchThirtyOneTwentyTwentySixMember" xlink:to="class_MarchThirtyOneTwentyTwentySixMember_lbl_5f2566" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_MarchThirtyOneTwentyTwentySixMember_lbl_5f2566" xml:lang="en-US">March 31, 2026 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalClassBCommonSharesMember" xlink:label="class_TotalClassBCommonSharesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalClassBCommonSharesMember" xlink:to="class_TotalClassBCommonSharesMember_lbl_d7de7e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalClassBCommonSharesMember_lbl_d7de7e" xml:lang="en-US">Total Class B common shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RestOfClassoverDEShareholdersPriorToMergerClassBBMember" xlink:label="class_RestOfClassoverDEShareholdersPriorToMergerClassBBMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RestOfClassoverDEShareholdersPriorToMergerClassBBMember" xlink:to="class_RestOfClassoverDEShareholdersPriorToMergerClassBBMember_lbl_4c395c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RestOfClassoverDEShareholdersPriorToMergerClassBBMember_lbl_4c395c" xml:lang="en-US">Rest of Classover DE shareholders prior to merger - Class B [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_BFACSponsorsClassBMember" xlink:label="class_BFACSponsorsClassBMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_BFACSponsorsClassBMember" xlink:to="class_BFACSponsorsClassBMember_lbl_42fb4b" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_BFACSponsorsClassBMember_lbl_42fb4b" xml:lang="en-US">BFAC sponsors - Class B [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FounderOfClassoverDEClassAMember" xlink:label="class_FounderOfClassoverDEClassAMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FounderOfClassoverDEClassAMember" xlink:to="class_FounderOfClassoverDEClassAMember_lbl_bea064" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FounderOfClassoverDEClassAMember_lbl_bea064" xml:lang="en-US">Founder of Classover DE - Class A [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ClassoverDEEquityHoldersSeriesAPreferredSharesMember" xlink:label="class_ClassoverDEEquityHoldersSeriesAPreferredSharesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ClassoverDEEquityHoldersSeriesAPreferredSharesMember" xlink:to="class_ClassoverDEEquityHoldersSeriesAPreferredSharesMember_lbl_202d43" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ClassoverDEEquityHoldersSeriesAPreferredSharesMember_lbl_202d43" xml:lang="en-US">Classover DE equity holders-Series A Preferred Shares [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SeriesAPreferredSharesMember" xlink:label="class_SeriesAPreferredSharesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SeriesAPreferredSharesMember" xlink:to="class_SeriesAPreferredSharesMember_lbl_7e8629" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SeriesAPreferredSharesMember_lbl_7e8629" xml:lang="en-US">Series A Preferred Shares [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl_4d7064" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharesIssued_lbl_4d7064" xml:lang="en-US">Shares, issued</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl_8cd2f8" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl_8cd2f8" xml:lang="en-US">Sale of Stock [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl_5195fc" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl_5195fc" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PreferredSharesMember" xlink:label="class_PreferredSharesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PreferredSharesMember" xlink:to="class_PreferredSharesMember_lbl_560fed" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PreferredSharesMember_lbl_560fed" xml:lang="en-US">Preferred Shares</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_March2026ReverseStockMember" xlink:label="class_March2026ReverseStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_March2026ReverseStockMember" xlink:to="class_March2026ReverseStockMember_lbl_1eae13" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_March2026ReverseStockMember_lbl_1eae13" xml:lang="en-US">March 2026 Reverse Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_BFACSponsorMember" xlink:label="class_BFACSponsorMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_BFACSponsorMember" xlink:to="class_BFACSponsorMember_lbl_0880ad" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_BFACSponsorMember_lbl_0880ad" xml:lang="en-US">BFAC Sponsor [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_LuoHuiMember" xlink:to="class_LuoHuiMember_lbl_49269d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_LuoHuiMember_lbl_49269d" xml:lang="en-US">Luo Hui [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PIPEInvestorMember" xlink:label="class_PIPEInvestorMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PIPEInvestorMember" xlink:to="class_PIPEInvestorMember_lbl_e499a2" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PIPEInvestorMember_lbl_e499a2" xml:lang="en-US">PIPE investor [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TwoZeroTwoFourIncentivePlanMember" xlink:label="class_TwoZeroTwoFourIncentivePlanMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TwoZeroTwoFourIncentivePlanMember" xlink:to="class_TwoZeroTwoFourIncentivePlanMember_lbl_b6415d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TwoZeroTwoFourIncentivePlanMember_lbl_b6415d" xml:lang="en-US">2024 Incentive Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntellectualPropertyMember" xlink:label="us-gaap_IntellectualPropertyMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntellectualPropertyMember" xlink:to="us-gaap_IntellectualPropertyMember_lbl_26e499" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntellectualPropertyMember_lbl_26e499" xml:lang="en-US">Intellectual Property [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TwoZeroTwoFiveLongTermEquityIncentivePlanMember" xlink:label="class_TwoZeroTwoFiveLongTermEquityIncentivePlanMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TwoZeroTwoFiveLongTermEquityIncentivePlanMember" xlink:to="class_TwoZeroTwoFiveLongTermEquityIncentivePlanMember_lbl_8d0c48" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TwoZeroTwoFiveLongTermEquityIncentivePlanMember_lbl_8d0c48" xml:lang="en-US">2025 Long Term Equity Incentive Plan [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_SeriesBConvertiblePreferredStockMember" xlink:label="class_SeriesBConvertiblePreferredStockMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_SeriesBConvertiblePreferredStockMember" xlink:to="class_SeriesBConvertiblePreferredStockMember_lbl_053e23" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_SeriesBConvertiblePreferredStockMember_lbl_053e23" xml:lang="en-US">Series B Convertible Preferred Stock [Member]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl_43392e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl_43392e" xml:lang="en-US">Preferred stock shares authorized</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockNoParValue" xlink:label="us-gaap_PreferredStockNoParValue" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockNoParValue" xlink:to="us-gaap_PreferredStockNoParValue_lbl_a4e2fb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockNoParValue_lbl_a4e2fb" xml:lang="en-US">Preferred stock, par value</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockSplits" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockSplits_lbl_d70027" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockSplits_lbl_d70027" xml:lang="en-US">Pre-split basis shares</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockSharesConverted1" xlink:to="us-gaap_ConversionOfStockSharesConverted1_lbl_b61af9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConversionOfStockSharesConverted1_lbl_b61af9" xml:lang="en-US">Converted shares</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DebtInstrumentAggregatePrincipalAmount" xlink:to="class_DebtInstrumentAggregatePrincipalAmount_lbl_9685b7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="class_DebtInstrumentAggregatePrincipalAmount_lbl_9685b7" xml:lang="en-US">Aggregate principal amount</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_DebtInstrumentAggregatePrincipalAmount" xlink:label="class_DebtInstrumentAggregatePrincipalAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_DebtInstrumentAggregatePrincipalAmount" xlink:to="class_DebtInstrumentAggregatePrincipalAmount_lbl_6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_DebtInstrumentAggregatePrincipalAmount_lbl_6" xml:lang="en-US">[Aggregate principal amount]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockAmountIssued1" xlink:to="us-gaap_ConversionOfStockAmountIssued1_lbl_67eee9" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConversionOfStockAmountIssued1_lbl_67eee9" xml:lang="en-US">Conversion notes amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConversionOfStockAmountIssued1" xlink:label="us-gaap_ConversionOfStockAmountIssued1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockAmountIssued1" xlink:to="us-gaap_ConversionOfStockAmountIssued1_lbl_7" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockAmountIssued1_lbl_7" xml:lang="en-US">[Conversion of Stock, Amount Issued]</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl_060661" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl_060661" xml:lang="en-US">Fair value conversion</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockDividendRatePercentage" xlink:label="us-gaap_PreferredStockDividendRatePercentage" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendRatePercentage" xlink:to="us-gaap_PreferredStockDividendRatePercentage_lbl_a839be" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl_a839be" xml:lang="en-US">Annual dividends payable</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_CommonStockNoParValues" xlink:label="class_CommonStockNoParValues" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_CommonStockNoParValues" xlink:to="class_CommonStockNoParValues_lbl_b530e4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_CommonStockNoParValues_lbl_b530e4" xml:lang="en-US">Converted par value</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl_752adf" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl_752adf" xml:lang="en-US">Granted shares</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RerverseStockDescription1" xlink:label="class_RerverseStockDescription1" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RerverseStockDescription1" xlink:to="class_RerverseStockDescription1_lbl_5b2b5f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RerverseStockDescription1_lbl_5b2b5f" xml:lang="en-US">Rerverse stockw description</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ShareRedemptionsDescription" xlink:label="class_ShareRedemptionsDescription" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ShareRedemptionsDescription" xlink:to="class_ShareRedemptionsDescription_lbl_9d15da" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ShareRedemptionsDescription_lbl_9d15da" xml:lang="en-US">Share redemptions description</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_TotalNumberOfSharesAuthorized" xlink:label="class_TotalNumberOfSharesAuthorized" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_TotalNumberOfSharesAuthorized" xlink:to="class_TotalNumberOfSharesAuthorized_lbl_78841e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_TotalNumberOfSharesAuthorized_lbl_78841e" xml:lang="en-US">Total shares authorized</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_FormerShares" xlink:label="class_FormerShares" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_FormerShares" xlink:to="class_FormerShares_lbl_02fa12" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_FormerShares_lbl_02fa12" xml:lang="en-US">Former share issued</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RerverseStockDescription" xlink:label="class_RerverseStockDescription" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RerverseStockDescription" xlink:to="class_RerverseStockDescription_lbl_1a198e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RerverseStockDescription_lbl_1a198e" xml:lang="en-US">Rerverse stock description</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ShareReceived" xlink:label="class_ShareReceived" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ShareReceived" xlink:to="class_ShareReceived_lbl_d2b5bb" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ShareReceived_lbl_d2b5bb" xml:lang="en-US">Share received during period</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_WarrantDescriptions" xlink:label="class_WarrantDescriptions" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_WarrantDescriptions" xlink:to="class_WarrantDescriptions_lbl_b76780" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_WarrantDescriptions_lbl_b76780" xml:lang="en-US">Warrants description</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Investments" xlink:to="us-gaap_Investments_lbl_b926cd" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Investments_lbl_b926cd" xml:lang="en-US">Investment amount</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl_b5b818" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl_b5b818" xml:lang="en-US">Share issued for service</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl_6bcdd6" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl_6bcdd6" xml:lang="en-US">Stock compensation cost</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_OutstandingBillPaymentAmount" xlink:label="class_OutstandingBillPaymentAmount" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_OutstandingBillPaymentAmount" xlink:to="class_OutstandingBillPaymentAmount_lbl_09504c" xlink:type="arc" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Cash_lbl_8984c1" xml:lang="en-US">Cash</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_LongTermIncentiveDescription_lbl_b70bce" xml:lang="en-US">Long-term incentive description</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl_80e3ab" xml:lang="en-US">Common stock, authorized</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConversionOfStockSharesIssued1_lbl_494ff1" xml:lang="en-US">Share issued upon conversion</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl_53ff12" xml:lang="en-US">Common stock, issued</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PeferredSharesDescription" xlink:label="class_PeferredSharesDescription" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PeferredSharesDescription" xlink:to="class_PeferredSharesDescription_lbl_236c6d" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PeferredSharesDescription_lbl_236c6d" xml:lang="en-US">Peferred share description</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl_57411c" xml:lang="en-US">Shares issued value</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesIssued_lbl_3dfde2" xml:lang="en-US">Preferred stock, issued</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightUnissued" xlink:to="us-gaap_ClassOfWarrantOrRightUnissued_lbl_c00112" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl_c00112" xml:lang="en-US">Warrant issued</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightUnissued" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightUnissued" xlink:to="us-gaap_ClassOfWarrantOrRightUnissued_lbl_33" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightUnissued_lbl_33" xml:lang="en-US">[Class of Warrant or Right, Unissued]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_lbl_5c214e" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl_5c214e" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_RevenuesMember" xlink:label="class_RevenuesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_RevenuesMember" xlink:to="class_RevenuesMember_lbl_1c580c" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_RevenuesMember_lbl_1c580c" xml:lang="en-US">Revenues [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_PurchasesMember" xlink:label="class_PurchasesMember" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_PurchasesMember" xlink:to="class_PurchasesMember_lbl_4bb28f" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_PurchasesMember_lbl_4bb28f" xml:lang="en-US">Purchases [Member]</link:label>
    <link:loc xlink:type="locator" xlink:href="class-20260331.xsd#class_ConcentrationRiskPercentage" xlink:label="class_ConcentrationRiskPercentage" />
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="class_ConcentrationRiskPercentage" xlink:to="class_ConcentrationRiskPercentage_lbl_788cf4" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="class_ConcentrationRiskPercentage_lbl_788cf4" xml:lang="en-US">Concentration risk percentage</link:label>
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit" xlink:label="us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashReserveDepositRequiredAndMade" xlink:label="us-gaap_CashReserveDepositRequiredAndMade" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashReserveDepositRequiredAndMade_lbl_37b805" xml:lang="en-US">Cash deposit balance</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl_c7112f" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventMember_lbl_13f41f" xml:lang="en-US">Subsequent Event [Member]</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebt" xlink:label="us-gaap_ConvertibleDebt" />
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