Known For
Acting
Gender
Female
Birthday
January 22, 2000
Age
26
Place of Birth
Seoul, South Korea
Popularity
0.6
Y:SY
Acting
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.
Also known as
이서연 · 서연 · Lee Seo-yeon · Yi Seo-yeon
Latest News
Known For
8.5
Lee Mujin Service
2022 · TV
8.7
The Game Caterers
2021 · TV
0.0
Jae Joong and Friends
2023 · TV
0.0
The Silence Of IDOL
2020 · TV
9.0
Idol School
2017 · TV
0.0
Duckbap House
2025 · TV
0.0
fromis_9's Autumn Night
2022 · TV
0.0
fromis_9's Summer Night
2022 · TV
6.5
Welcome to Heal Inn
2018 · TV
10.0
Fromis's Room
2017 · TV
6.5
We See Winter
2019 · TV
0.0
프롤로그_프로미스의 방 엿보기
2017 · TV
Filmography
2025
Duckbap House
TV · Self
0.0
2023
Jae Joong and Friends
TV
0.0
2023
fromis_9 concert ＜LOVE FROM.＞ IN JAPAN
Movie
0.0
2022
fromis_9's Autumn Night
TV · Self
0.0
2022
fromis_9's Summer Night
TV · Self
0.0
2022
Lee Mujin Service
TV · Guest
8.5
2021
The Game Caterers
TV · Self
8.7
2020
The Silence Of IDOL
TV · Self
0.0
2019
We See Winter
TV
6.5
2018
Welcome to Heal Inn
TV
6.5
2017
Fromis's Room
TV
10.0
2017
프롤로그_프로미스의 방 엿보기
TV
0.0
2017
Idol School
TV · Self - Contestant
9.0