| “ |
I fell in love at first sight~ Hello, we are CSR! |
” |
| —CSR | ||
CSR (Korean: 첫사랑; Japanese: チョッサラン) is a seven-member girl group under A2Z Entertainment. They debuted on July 27, 2022 with the mini album Sequence : 7272.
The girl group's concept is a 'class of young girls who were born in 2005.'
Career[]
2019–2022: Pre-debut as 05Class[]
In 2019, J Planet Entertainment opened SNS accounts for their new upcoming girl group '05Class', then consisting of members Sua, Seoyeon, Yeham, Dahyun and Taehee; however, Dahyun and Taehee departed from the group in February 2020. Geumhee was added to the lineup in April 2020, and Duna joined in December 2020. On January 7, 2022, they introduced two new members, Sihyeon and Yuna.[1]
During this time, Yoonjung, Gaeun, Sona, and Naeun were also added to the lineup, but all four withdrew shortly after being added.
2022: Debut with Sequence : 7272, "Sequence : 17&" and first music show win[]
On July 8, 2022, the group's name was revealed to be 첫사랑 (CSR), meaning “first love”, and the group's official SNS accounts were opened.[2] It was also determined that the group will be debuting under A2Z Entertainment instead of J Planet Entertainment.
In the following days, two debut trailers were released, before a schedule poster, posted on July 11, confirmed the release of their first mini album Sequence : 7272, scheduled for July 28. The group debuted a day prior with the release of the music video for the title track, "Pop? Pop!".[3]
On October 26, A2Z Entertainment announced that the group would make their first comeback on November 17.[4] Around a week later, on November 6, 2022, a schedule teaser was released, revealing the comeback to be a single album called "Sequence : 17&".[5]
On November 17, they revealed their fandom name to be "Maeum".[6]
On December 2, the group received their first music show win on Music Bank with "Loveticon (♡TiCON)". [7]
2023: Delight, leadership change, "HBD To You (Midnight Ver.)", "HBD To You"[]
On March 13, 2023, EDAILY reported that CSR will return with a new mini-album later this month.[8] The next day, CSR revealed that their second mini album, Delight, will be released on March 29.[9] On July 27, it was announced that Sua would be stepping down as leader and Duna would become the leader of the group going forward.[10]
On November 17, it was announced that CSR would released their first digital single "HBD To You (Midnight Ver.)" on November 26.[11]
On December 17, the group released their second digital single "HBD To You".[12]
On December 22, A2Z announced that members Geumhee, Seoyeon, Duna and Yeham will be going on hiatus from group activities due to their overseas schedules.[13]
2024: "L'heure Bleue : Prologue", L'heure Bleue[]
On May 26, 2024, the group released a teaser for their upcoming comeback which is set to be released on June 11.[14]
On May 29, the group announced their plans to release their second single album "L'heure Bleue : Prologue" on June 11 and release their debut Japanese mini album L'heure Bleue on July 3.[15]
2025: A-IDOL, Red Soda Circle[]
On March 11, 2025, it was announced that CSR will be participating in the survival show A-IDOL.[16] However for an unknown reason, Sihyeon didn't participate in the show.
On October 13, a teaser poster for Red Soda Circle were unveiled.[17] It was later revealed that members Yuna and Yeham, going by Rina[18] and Haru[19] will be opening a YouTube channel on October 20[20] and start unit activities.[21]
Members[]
The members have no official and exact fixed positions, except the leader position.
| Name | Position(s) | Years active |
|---|---|---|
| Geumhee (금희) | Main Rapper, Lead Dancer | 2019–present |
| Sihyeon (시현) | Lead Rapper, Vocalist | 2022–present |
| Seoyeon (서연) | Lead Vocalist | 2019–present |
| Yuna (유나) | Lead Vocalist, Lead Dancer | 2022–present |
| Duna (두나) | Leader (2023–present), Lead Dancer, Lead Vocalist, Center, Visual | 2020–present |
| Sua (수아) | Main Dancer, Lead Vocalist, Leader (2019–2023) | 2019–present |
| Yeham (예함) | Main Vocalist, Maknae | 2019–present |
| Pre-debut | ||
| Dahyun (다현) | N/A | 2019-2020 |
| Taehee (태희) | N/A | 2019-2020 |
| Naeun (나은) | N/A | 2020 |
| Yoonjung (윤정) | N/A | 2020-2021 |
| Sona (소나) | N/A | 2021 |
| Gaeun (가은) | N/A | 2021 |
Discography[]
Korean[]
Mini albums[]
Single albums[]
Digital singles[]
|
Remix singles[]
OSTs[]
Participation releases[]
|
Japanese[]
Mini albums[]
- L'heure Bleue (2024)
Concerts[]
Showcases[]
- CSR 1st Showcase in Japan [Delight] (2023)
Japan tours[]
- CSR 1st Japan Tour: L'heure Bleue (2024)
- CSR 2025 Special Live in Japan Class of Season 2 Episode (2025)[22]
Concert participation[]
- KCON Japan 2023 Showcase: NICE TO MEET U[23] (2023)
- 2023 Korean Culture Festival MOVE WITH THE K-VIBE in Amsterdam (2023)
- Hallyu Town in Belgium (2023)[24]
Filmography[]
Survival shows[]
- A-IDOL (MBC, 2025)
Variety shows[]
- Music Universe K-909 (JTBC, 2023) - guest (ep. 17)
Gallery[]
- Main article: CSR/Gallery
References[]
- ↑ (KR) YouTube: Ep14. 열여덟 인생 제대로 살아보자. | 새해 목표(구독자 10만, 데뷔 그리고) | 수아의 밀착 취재❤️ | 이건 취재인가 취조인가🤔 | 뉴멤버 등장 | 18살 | V-log
- ↑ @CSR_offcl on Twitter (July 8, 2022)
- ↑ @CSR_offcl on Twitter (July 11, 2022)
- ↑ Daum: 걸그룹 첫사랑, 11월 17일 수능일 컴백..4세대 걸그룹 존재감 (ko)
- ↑ @CSR_offcl on Twitter (November 6, 2022)
- ↑ @CSR_offcl on Twitter (November 17, 2022)
- ↑ Soompi: Watch: CSR Takes 1st Win For “♡TiCON” On “Music Bank”; Performances By KARA, Red Velvet, ITZY, And More
- ↑ (KOR) EDAILY: 단독이젠 18세 걸그룹…'중소돌' 기적 첫사랑, 3월 말 컴백
- ↑ @CSR_offcl on Twitter (March 14, 2023)
- ↑ @CSR_offcl on Twitter (July 27, 2023)
- ↑ @CSR_offcl on Twitter (November 17, 2023)
- ↑ @CSR_offcl on Twitter (December 17, 2023)
- ↑ Bstagem Information on future activities of CSR (December 22, 2023)
- ↑ @CSR_offcl on X (May 26, 2024)
- ↑ @CSR_offcl on X (May 29, 2024)
- ↑ (KR) Naver Blog: [현장스케치] "AI-DOL", 인간의 가장 창의적 영역을 AI가 어떻게 이해하고 지원할 수 있을까?
- ↑ @redsodacircle on X (October 13, 2025)
- ↑ @redsodacircle on X (October 14, 2025)
- ↑ @redsodacircle on X (October 15, 2025)
- ↑ @redsodacircle on X (October 16, 2025)
- ↑ @redsodacircle on X (October 17, 2025)
- ↑ @FCLIVE_official on X (October 17, 2025)
- ↑ @KCON_official on Twitter (April 21, 2023)
- ↑ (KR) iMBC: MBC '한류타운 in 벨기에', 한류와 함께 해외 시장 문 두드리다
Official links[]
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