<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-03-18</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0002000366</issuerCik>
        <issuerName>Scage Future</issuerName>
        <issuerTradingSymbol>SCAG</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002126568</rptOwnerCik>
            <rptOwnerName>Wang Yixian</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O SCAGE FUTURE, 2F, BUILDING 6</rptOwnerStreet1>
            <rptOwnerStreet2>NO. 6 FENGXIN ROAD, YUHUATAI DISTRICT</rptOwnerStreet2>
            <rptOwnerCity>NANJING CITY</rptOwnerCity>
            <rptOwnerNonUSStateTerritory>JIANGSU PROVINCE</rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>F4</rptOwnerCountry>
            <rptOwnerZipCode>210012</rptOwnerZipCode>
            <rptOwnerStateDescription>CHINA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>/s/ Yixian Wang</signatureName>
        <signatureDate>2026-04-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
