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CSR(첫사랑) is a South Korean girl group formed and managed by Pop Music. The septet – consisting of members Sua, Geumhee, Sihyeon, Seoyeon, Yuna, Duna and Yeham - They made their official debut on July 28, 2022, with the release of their first extended play (EP) Sequence: 7272.[[Geumhee ( 금희 ) Sihyeon ( 시현 ) Seoyeon ( 서연 ) Yuna ( 유나 ) Duna ( 두나 ) Sua ( 수아 ) Yeham ( 예함 )|members]]