1. 안녕, 겨울 Lyrics by 정승환 Composed by 서동환 정승환 Arranged by 서동환 Strings Arranged by 서동환 Drums by 김승호 Bass by 최인성 Guitars by 적재 Piano by 서동환 Strings Performed by 융스트링 BGVs 김희원 Mixed by 지승남 at Antenna Studio (Assisted by 양서연)
2. 십이월 이십오일의 고백 Lyrics by 아이유 Composed by 제휘 Arranged by 제휘 서동환 Strings Arranged by 서동환 Drums by 제휘 Bass by 제휘 Guitars by 제휘 Piano by 제휘 Programming 제휘 Strings Performed by 융스트링 BGVs 정승환 제휘 김희원 Mixed by 김대성 at Tone Studio
- Producer 유희열 Recording Engineer 지승남 at Antenna Studio (Assisted by 양서연) 김대성 김도훈 김시민 at TONE Studio 이창선 at Prelude Studio 정기홍 최다인 at 서울스투디오 Mastering Engineer 권남우 at 821 Sound Mastering
M/V Director 정진수 Visualsfrom. LIVE CLIP Director 이인훈 SEGAJI VIDEO Stylist 강국화 Hair & Make-up 체체 한슬 & 영화 LABO de CHEMI
