1
INSTALOVE
Songs
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2
ENERGY
3
Stay Beautiful
4
LANGUAGE
5
My Blanket
Singles & EPs
GOODIES
EP • 2026
Webtoon ‘The Remarried Empress’ Part. 2 (Original Soundtrack)
Single • 2026
NAKED
Single • 2025
우린 마지막 봄인가 봐 (I Guess It`s Our Last Spring)
Single • 2024
Videos
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이서연 (Y:SY) 'ENERGY' Official Video
Y:SY Stay Beautiful Lyrics (Color Coded Lyrics)
Y:SY LANGUAGE Lyrics (Color Coded Lyrics)
이서연 (Y:SY) 'NAKED' Official MV
이서연 (Y:SY) - From The Day [웹툰 ‘재혼 황후’ OST] [가사/Lyrics]
Official Liveㅣ이서연 (프로미스나인) - 우린 마지막 봄인가 봐 (I Guess It's Our Last Spring)
260920 Y:SY 이서연 팬싸인회에서 보는 ENERGY
y:sy 'NAKED' DS instrumental
이서연(Y:SY) - "ENERGY"
AUDIOㅣfromis_9 - My Night Routine (I Guess It's Our Last Spring inst.)
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