Y:SY
Acting·Jan 22, 2000·Seoul, South Korea
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NA/10 avgNo member ratings yetLee 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.
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 fromis_9 concert ＜LOVE FROM.＞ IN JAPAN2023 · Actor | Actor |