노스탤지어. [credits] song and lyrics written by kennytheking track 1. arranged by omm.. co-arranged by 손길현, 이상윤, 박상현, kennytheking kennytheking (vocal, E.G.) omm.. (alto sax) 손길현 (keys) 이상윤 (bass) 박상현 (drums) track 2. arranged by hayane co-arranged by kennytheking, omm.., 이상윤 kennytheking (vocal, background vocals, E.G., keys, MIDI programming) hayane (A.G.) 이상윤 (bass) omm.. (percussions) mixed by omm.. mastered by 곽동준 at small‘s studio artwork by omm..