GFriend – 回:Walpurgis Night

Backing Vocals – Paulina Cerrilla
Backing Vocals – Eunha
Backing Vocals – Yuju
Edited By [Digital Editing] – Frants
Edited By [Digital Editing] – 이원종
Guitar – 영
Keyboards, Bass, Programmed By [Computer Programming], Directed By [Vocals] – Frants
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Bighit Studio] – Yang Ga
Producer – Frants
Recorded By [Bighit Studio, Vibe Music Studio 606] – Frants
Written-By – Justin Robert Reinstein
Written-By – Alice Vicious
Written-By – Jaded Jane
Written-By – "Hitman"Bang
Written-By – 조윤경
Written-By – Ellen Berg Tollbom
Written-By – Frants
Written-By – Cazzi Opeia
Written-By – Noisy Citizen
Written-By – JJean
Written-By – Paulina Cerrilla
Written-By – Umji
Written-By – Eunha
Written-By – Kyler Niko
Written-By – Yuju

Backing Vocals – Maria Marcus
Edited By [Digital Editing] – Frants
Edited By [Digital Editing] – 이원종
Keyboards, Guitar, Bass, Drum, Organ, Programmed By [Computer Programming], Directed By [Vocals] – Frants
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Bighit Studio] – Yang Ga
Producer – Frants
Recorded By [Vibe Music Studio 606] – Frants
Written-By – Mi Sung
Written-By – "Hitman"Bang
Written-By – Frants
Written-By – Znee
Written-By – Maria Marcus

Backing Vocals – 사운드킴
Backing Vocals – Mayu Wakisaka
Directed By [Vocals], Edited By [Digital Editing] – 이원종
Directed By [Vocals], Edited By [Digital Editing] – 노주환
Drum – 이원종
Drum – 김정우
Guitar, Bass – 김정우
Keyboards, Programmed By [Computer Programming] – 이원종
Keyboards, Programmed By [Computer Programming] – 노주환
Keyboards, Programmed By [Computer Programming] – 김정우
Mastered By [821 Sound Mastering] – 권남우
Mixed By [J's Atelier] – 정진
Producer – 이원종
Producer – 노주환
Recorded By [Vibe Music Studio 606] – 이원종
Recorded By [Vibe Music Studio 606] – 노주환
Written-By – 이원종
Written-By – 노주환
Written-By – 김정우
Written-By – Mayu Wakisaka

Backing Vocals – 전재희
Edited By [Digital Editing] – Kim Min Hee
Guitar – Ferdy (6)
Keyboards – 손영진
Mastered By [821 Sound Mastering] – 권남우
Mixed By [821 Sound] – 마스터키
Producer – MosPick
Programmed By [Computer Programming], Directed By [Vocals] – MosPick
Recorded By [Vibe Music Studio 606] – 곽정신
Recorded By [Vibe Music Studio 606] – 정모연
Synth – 예아나이스
Written-By – 예아나이스
Written-By – JayJay (7)
Written-By – Ferdy (6)
Written-By – 손영진

Backing Vocals – 황연경
Backing Vocals – 이원종
Directed By [Vocals] – 웅킴
Directed By [Vocals] – 노주환
Drum – 노주환
Edited By [Digital Editing] – 웅킴
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Mapps Studio] – 김석민
Piano, Bass – 웅킴
Producer – 노주환
Recorded By [Vibe Music Studio 606] – 웅킴
Recorded By [Vibe Music Studio 606] – 노주환
Written-By – Simon Petrén
Written-By – 웅킴
Written-By – SinB
Written-By – Yerin
Written-By – 노주환
Written-By – Andreas Oberg

Backing Vocals – 사운드킴
Directed By [Vocals] – 13 (25)
Edited By [Digital Editing] – 정유라
Electric Piano, Drum – Score (10)
Guitar, Bass – 김병석
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Klang Studio - Assistant] – 정유라
Mixed By [Klang Studio] – 구종필
Producer – 13 (25)
Recorded By [Vibe Music Studio 606] – 곽정신
Recorded By [Vibe Music Studio 606] – 정모연
Written-By – Luke (113)
Written-By – Umji
Written-By – Sowon
Written-By – Score (10)
Written-By – Megatone (4)

Keyboards, Bass, Drum, Programmed By [Computer Programming], Directed By [Vocals], Edited By [Digital Editing] – 노주환
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Stay Tuned Studio] – Stay Tuned (5)
Producer – 노주환
Recorded By [Vibe Music Studio 606] – 노주환
Written-By – Eunha
Written-By – 노주환
Written-By – Yuju

Backing Vocals – Chendy
Backing Vocals – Umji
Backing Vocals – Eunha
Backing Vocals – Hannah Robinson
Backing Vocals – 전재희
Backing Vocals – Yuju
Bass, Programmed By [Computer Programming] – Frants
Bass, Programmed By [Computer Programming] – Pdogg
Keyboards, Guitar – Frants
Mastered By [Sterling Sound] – Chris Gehringer
Mixed By [The Ninja Beat Club - Assistant] – Bill Zimmerman (2)
Mixed By [The Ninja Beat Club] – Phil Tan
Piano, Directed By [Vocals], Edited By [Digital Editing] – Pdogg
Producer – "Hitman"Bang
Producer – Frants
Producer – Pdogg
Recorded By [Dogg Bounce] – Pdogg
Written-By – 倪子岡
Written-By – 이스란
Written-By – Richard Phillips (2)
Written-By – "Hitman"Bang
Written-By – Chendy
Written-By – 구여름
Written-By – 김진
Written-By – Frants
Written-By – Eunha
Written-By – Pdogg
Written-By – 노주환
Written-By – Hannah Robinson
Written-By – 황현
Written-By – Yuju

Arranged By [Strings] – 김바로
Backing Vocals – 이원종
Backing Vocals – 윤빛나라
Bass – 김예일
Drum – 정동윤
Guitar – 류현우
Keyboards, Programmed By [Computer Programming], Directed By [Vocals], Edited By [Digital Editing] – 이원종
Keyboards, Programmed By [Computer Programming], Directed By [Vocals], Edited By [Digital Editing] – 노주환
Mastered By [ZeeQ Studio] – Yasuo Matsumoto
Mixed By [ZeeQ Studio] – Yasuo Matsumoto
Piano – 노주환
Producer – 이원종
Producer – 노주환
Recorded By [The Vibe Studio] – 정두석
Strings – 융스트링

Backing Vocals – 김연서
Directed By [Vocals], Edited By [Digital Editing] – 이원종
Directed By [Vocals], Edited By [Digital Editing] – 노주환
Drum Programming – 이원종
Guitar, Bass – 김정우
Keyboards – 이원종
Keyboards – 김정우
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Mapps Studio] – 김석민
Piano – 노주환
Producer – "Hitman"Bang
Producer – 이원종
Producer – 노주환
Recorded By [The Vibe Studio] – 정두석
Written-By – Carlos K.
Written-By – "Hitman"Bang
Written-By – 조윤경
Written-By – 김연서
Written-By – Frants
Written-By – Adora (6)
Written-By – 이원종
Written-By – 노주환
Written-By – Sophia Pae
Written-By – 김정우

Backing Vocals – 권애진
Backing Vocals – GFriend
Bass – 김병석
Edited By [Digital Editing] – 황현
Edited By [Digital Editing] – 전부연
Guitar – 적재
Keyboards, Arranged By [Strings], Directed By [Vocals] – 황현
Mastered By [821 Sound Mastering] – 권남우
Mixed By [Klang Studio - Assistant] – 박선영
Mixed By [Klang Studio] – 구종필
Producer – 황현
Recorded By [Seoul Studio] – 정기홍
Recorded By [Vibe Music Studio 606] – 곽정신
Recorded By [Vibe Music Studio 606] – 정모연
Strings – With String
Written-By – 황현
Written-By – Mayu Wakisaka