Butterfly (버터플라이) Vocal 박기영, 김태영 Composed by 이재학 Lyrics by 이재학, 강현민 Arranged by 박영신 Drums 김영준 Bass 박영신 Guitar 정다운 Keyboard 전영호 Chorus 박기영, 전재홍, 김시민 Produced & Directed by 박기영 Recorded by 오형석 박정호 @Titan Recording Studio Vocal recorded & track addicted by 김시민 @ggack_studio Mixed by 김시민 @ggack_studio Marstered by 권남우@821 Sound Mastering Cover illustration Designed by 이기호(BluceTripleSix) Music video @IDA MEDIA Director 채희석 PD 최성윤 D.O.P 이승복 D.O.P 정훈영 AD 최소영 Hair & Make up 김지니, 임소영 @ark.atelier.official Executive Producer 박기영 Elijah Company Director 김승필 에스피케이엔터테인먼트 Promotion & Marketing 김승재 Management 김승재, 김종환