Y:SY
- Known for
- Acting
- Born
- January 22, 2000 (age 26)
- Birthplace
- Seoul, South Korea
Biography
Lee Seo-yeon, known professionally as Y:SY, is a South Korean singer-songwriter and rapper under H1GHR Music. She is a former member of the girl group fromis_9, formed through the reality survival show Idol School (2017). She left the group in 2024. She made her solo debut on November 17, 2025, with the digital single Naked.
Known For
Photos
Filmography
Duckbap House
TV · as Self · 1 ep
fromis_9 concert ＜LOVE FROM.＞ IN JAPAN
Movie
Jae Joong and Friends
TV · 1 ep
Lee Mujin Service
TV · as Guest · 1 ep
fromis_9's Summer Night
TV · as Self · 9 eps
fromis_9's Autumn Night
TV · as Self · 13 eps
The Game Caterers
TV · as Self · 3 eps
The Silence Of IDOL
TV · as Self · 2 eps
We See Winter
TV · 2 eps
Welcome to Heal Inn
TV · 4 eps
Idol School
TV · as Self - Contestant · 11 eps
프롤로그_프로미스의 방 엿보기
TV · 1 ep
Fromis's Room
TV · 5 eps