CSR (Cheotsarang, meaning First Love in Korean) is a seven-member K-pop girl group whose English name means First Love. The lineup consists of GEUMHEE, SIHYEON, SEOYEON, YUNA, DUNA, SUA and YEHAM. Every member was born in 2005, a shared starting point that was built into the concept from the group’s July 2022 debut.

The debut EP Sequence: 7272 and title track Pop? Pop! presented an energetic first-love story. ♡TiCON followed in November 2022 and brought CSR its first music-show win on Music Bank in December. The group’s second EP, DELIGHT, and its lead single Shining Bright continued that melody-driven sound in March 2023.

CSR broadened its activities across Korea and Japan in 2024. Pretty mob, released on L’heure Bleue: Prologue in June, used a more rhythm-forward arrangement. The group’s first Japanese mini album L’heure Bleue arrived the following month, and further Japan performances kept the team active during the gap between Korean releases.

On March 26, 2026, CSR returned with Can’t Hide Anymore, a special digital single connected to ASTROCHILD IN THE LONELY PLANET. Contemporary reports identify CSR E&M in connection with the release, while RBW Japan continues to maintain the artist’s official Japanese information. The song’s synth-pop approach keeps the group’s first-love motif while reflecting a more mature stage in its career.

The fandom name MAEUM means heart. The story of seven peers growing up together remains one of CSR’s defining traits, even as the music and performance styling change from release to release.