Y:SY
- Acting
- January 22, 2000 · 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
Filmography
- Duckbap House · Self
- Jae Joong and Friends
- fromis_9 concert ＜LOVE FROM.＞ IN JAPAN
- fromis_9's Autumn Night · Self
- fromis_9's Summer Night · Self
- Lee Mujin Service · Guest
- The Game Caterers · Self
- The Silence Of IDOL · Self
- We See Winter
- Welcome to Heal Inn
- Fromis's Room
- 프롤로그_프로미스의 방 엿보기
- Idol School · Self