Acting

Y:SY

Discover Y:SY through TMDB biography data, known movie roles, TV appearances, filmography highlights and catalog links to related titles on recipemoon.

Born: 2000-01-22Seoul, 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.