There's only one thing we gotta do :: Credit Lyrics by psv:gun, DOOHEE Composed by psv:gun, DOOHEE, 임도혁 Arranged by psv:gun, DOOHEE Produced by psv:gun, DOOHEE Vocal by psv:gun, 임도혁 Chorus by psv:gun, 김채림 Choir 이성형, 유건, 송민선 Mixed by 이창조 Mastered by 박준 @ SoundMax Album Cover designed by 배영은