[credit] Produced by Nine9 Lyrics & Composed by Nine9 Arranged by Nine9 김서정 Vocal Nine9 Piano 김서정 Strings Arranged by 김지구 Violin 차지연 Recorded by Nine9 (at Good Nine Studio) Vocal Editing 박지연 Mixed by 김일호 (at 지음 Studio) Mastered by 권남우 (at 821 Sound) Art Work 안희진 Management Lable 엠와이뮤직 (M.Y.music) Supervisor 윤동환 A&R 임윤진, 박연경, 한지희 Media director 이지희, 진교월, 전해라 Photographer 드리몽 Art Director 최하영