Y:SY
Acting
January 22, 2000 (26 years old)
Seoul, South Korea
13
Acting Credits
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
2025
as Self
fromis_9 concert ＜LOVE FROM.＞ IN JAPAN
2023
Jae Joong and Friends
2023
Lee Mujin Service
2022
as Guest
8.5
fromis_9's Summer Night
2022
as Self
fromis_9's Autumn Night
2022
as Self
The Game Caterers
2021
as Self
8.7
The Silence Of IDOL
2020
as Seoyeon
We See Winter
2019
6.5
Welcome to Heal Inn
2018
6.5
Idol School
2017
as Self - Contestant
9
프롤로그_프로미스의 방 엿보기
2017
Fromis's Room
2017
10