SEOYEON
CSR · Lead Vocalist
Profile
SEOYEON (Ahn Seo-yeon) is a South Korean vocalist in CSR. Born in Bucheon in 2005, she is known as part of the group’s melodic line, which brings together youthful hooks and increasingly mature interpretations of the first-love theme.
After joining the 2022 debut lineup, she promoted the first single album Sequence: 17& and the mini album DELIGHT, with its bright title track Shining Bright. In 2024, she also appeared in Chuang Asia Thailand while CSR continued to develop its Korean and Japanese schedules.
Seoyeon participated in CSR’s March 2026 return with Can’t Hide Anymore. In the months leading into that release, the group continued to maintain its relationship with fans through Japan performances and official channels.
Career Milestones & Individual Activities
Can’t Hide Anymore
Returned with CSR’s special digital single and related Korean broadcast stages after a roughly 21-month gap between new Korean releases.
Chuang Asia Thailand
Appeared in the regional survival competition before returning to group activities.
Pretty mob and Japan debut
Participated in L’heure Bleue: Prologue and the first Japanese mini album L’heure Bleue.
DELIGHT · Shining Bright
Promoted CSR’s second Korean mini album and its bright lead single.
First Music Bank win
Contributed to the group’s first television music-show victory with ♡TiCON.
CSR debut
Debuted in the seven-member group formed from artists all born in 2005.
Personal SNS
News & Further Reading
Japanese news coverage confirms the 2026 single after the extended break.
Sports Kyunghyang English · March 27, 2026CSR on Korean music-show stages ↗English-language coverage of the group’s March comeback and performances.
RBW Japan · Official artist informationCSR Japanese releases and live work ↗The official artist page lists Japanese releases and the March 2026 project.