Acting
Y:SY
Acting · Born 2000-01-22 · Seoul, South Korea
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.
Credits · 12
Duckbap House
2025 · Self
Jae Joong and Friends
2023
fromis_9's Autumn Night
2022 · Self
fromis_9's Summer Night
2022 · Self
Lee Mujin Service
2022 · Guest
The Game Caterers
2021 · Self
The Silence Of IDOL
2020 · Seoyeon
We See Winter
2019
Welcome to Heal Inn
2018
Fromis's Room
2017
프롤로그_프로미스의 방 엿보기
2017
Idol School
2017 · Self - Contestant