작사 : Tae wan Kim, Josh Rose
작곡 : Tae wan Kim
편곡 : Tae wan Kim
Produced by Tae wan a.k.a C-Luv
Composed by Tae wan Kim
Lyrics by Tae wan Kim, Josh Rose
Arranged by Tae wan Kim
Keyboard & Drums by Tae wan Kim
Guitar by Soo Wan Jung
Chorus by Tae wan Kim
Recorded by 9999 at BRANDNEW MUSIC Studio
Mixed by MasterKey at MasterPiece SoundLab
Executive Produced by 라이머 a.k.a Mr. BIG Daddy for BRANDNEW MUSIC
Produced by 태완
Promotion & Artist Management Director 남서우
Recorded by 9999 at BRANDNEW MUSIC Studio
Mixed by 마스터키 at MasterPiece SoundLab
Mastered by 마스터키 at MasterPiece SoundLab
Administration Director 김형욱
Administration & Accounting 윤성혜, 김세민
Production Co-ordinator 마스터키, 원영헌, 동네형, 키겐, ASSBRASS, 리시, 9999, XEPY, 태완, DJ Juice
Artist Management 김종환, 정민규, 이호진, 권용완, 김준배
Strategy Planning 정의봉
A&R 유영준, 한태희
Marketing & Online Promotion 이미희, 오정아
Fan Marketing 이미희, 오정아, 타카야마 나리사
Overseas Business 타카야마 나리사, 이화일
Art Direction & Design Lafic
Style Director 이동연
Stylist Assistant 안재희, 전소은
Hair 라임 for 드엔, BLACK LIP (한주영, 윤혜정)
Make Up BLACK LIP (한주영, 윤혜정), 메이크업팀 for 드엔
M/V & Video Art Directed by Sparklesign (RX-85)
Presented by BRANDNEW MUSIC
01. Problem
Produced by Tae wan a.k.a C-Luv
Composed by Tae wan Kim
Lyrics by Tae wan Kim, Josh Rose
Arranged by Tae wan Kim
Keyboard & Drums by Tae wan Kim
Guitar by Soo Wan Jung
Chorus by Tae wan Kim
Recorded by 9999 at BRANDNEW MUSIC Studio
Mixed by MasterKey at MasterPiece SoundLab
02. Problem (Inst.)
Produced by Tae wan a.k.a C-Luv
Composed by Tae wan Kim
Arranged by Tae wan Kim
Keyboard & Drums by Tae wan Kim
Guitar by Soo Wan Jung
Recorded by 9999 at BRANDNEW MUSIC Studio
Mixed by MasterKey at MasterPiece SoundLab ....
.... 
