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Yeoreum
ArtistStarship Entertainment

Yeoreum

Yeoreum (여름) is a South Korean singer, sub-vocalist, and sub-rapper in WJSN (우주소녀), also known as Cosmic Girls. Born Lee Jin-sook (이진숙) and later legally renamed Lee Yeo-reum (이여름) on January 10, 1999, in Seoul, she debuted with WJSN on February 25, 2016, under Starship Entertainment. Her stage name translates directly to Summer in Korean.

Within WJSN, Yeoreum is the group's acknowledged performance ace. She plays piano, janggu, and pipe, holds a certified scuba diving license, and is known for her aegyo energy masked by a quiet demeanor. She graduated from SOPA (School of Performing Arts Seoul). She is a member of WJSN sub-units WJSN CHOCOME and Joy Unit.

In 2023, Yeoreum entered Mnet's survival show Queendom Puzzle and finished 5th, earning her debut in the project group EL7Z UP alongside H1-KEY's Hwiseo. EL7Z UP released Cheeky in September 2023 and QRJ?! in 2024 before going on hiatus.

As of 2025-2026, Yeoreum resumed activities with WJSN for the Bloom Hour comeback and is pursuing acting, having been cast in the drama Teacher Training (2025). She is close friends with TWICE's Chaeyoung and (G)I-DLE's Yuqi.

WJSN
Sub-Vocalist, Sub-Rapper of WJSN
0 articles3 creditsDebut: February 25, 2016Korean

Gallery

Discography

2023
EL7Z UPCollaboration
Member (5th Place, Queendom Puzzle)EL7Z UPStarship Entertainment
2020
WJSN ChocomeCollaboration
MemberWJSN ChocomeStarship Entertainment
2016
WJSNCollaboration
Lead Dancer, Sub-Vocalist, Sub-RapperWJSNStarship Entertainment

Fans Also Ask

What groups is Yeoreum in?
Yeoreum is a member of WJSN (Cosmic Girls) under Starship Entertainment and was part of the project group EL7Z UP, formed through Mnet's Queendom Puzzle in 2023. She also belongs to WJSN sub-units WJSN CHOCOME and Joy Unit.
Who is Yeoreum in WJSN?
Yeoreum is a sub-vocalist and sub-rapper in WJSN. Born January 10, 1999 in Seoul, she debuted with the group on February 25, 2016. Her birth name is Lee Jin-sook, later legally changed to Lee Yeo-reum. Her stage name means Summer in Korean.
How did Yeoreum join EL7Z UP?
Yeoreum participated in Mnet's survival show Queendom Puzzle in 2023, finishing in 5th place. This earned her a spot in the project group EL7Z UP, which debuted with Cheeky in September 2023 alongside H1-KEY's Hwiseo.
What does Yeoreum's stage name mean?
Yeoreum's stage name is the Korean word for Summer (여름). She was born Lee Jin-sook (이진숙) and later legally changed her name to Lee Yeo-reum (이여름).
What are Yeoreum's hobbies and skills?
Yeoreum plays piano, janggu (Korean percussion), and pipe. She holds a certified scuba diving license. She graduated from SOPA and is close friends with TWICE's Chaeyoung and (G)I-DLE's Yuqi.

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