YEHAM
CSR · Main Vocalist · Youngest Member
Profile
YEHAM (Koo Ye-ham) is the youngest member and a main vocalist of CSR. Born in October 2005, she is the final member in the group’s all-2005-born lineup. Her singing helps underpin CSR’s bright choruses and emotive melodies.
She debuted in July 2022 and performed with CSR through its first music-show trophy, the DELIGHT era and the Japanese release schedule in 2024. She also participated in Chuang Asia Thailand, which introduced her to a different international audience.
Yeham launched a separate project with CSR’s Yuna in October 2025, performing as Haru with Red Soda Circle. She remains connected to CSR and took part in the group’s March 2026 return with Can’t Hide Anymore.
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.
Red Soda Circle
Joined YUNA in a separate video and duo project as Haru; this is distinct from a personal solo album.
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.