넌 알지? 내가 왜 이러는지 :) -Credits- Vocal by 109 Lyrics by 109 Composed by 109, 오왠(O.WHEN) Produced by 람다 Arranged by 임수혁(Aiming) Chorus by 109 Piano by 임수혁(Aiming) Organ by 임수혁(Aiming) Guitar by 송현종 Drums by 은주현 Recorded by 이경탁 at Soundbay Mixed by 김영식 Mastered by 권태훈 Album Artwork by 캘희 (@Callihee) Executive Producer 왕기령, 김태선 Management dy music A&R Director 김태선 Vocal Director 전민, 람다