못 다한 편지 Executive Produced by Snacky Chan Album Produced by Asher Music Produced by Asher, Off Ramp, Seo Mary Artwork by 김하은 Mixed & Mastered by Same Time Lyrics by Asher (에이셔) Composed by Asher (에이셔), Off Ramp, Seo Mary Arranged by Asher (에이셔), Off Ramp, Seo Mary, 이환국, 이진주, 김영만 Vocals by Asher Guitar by Off Ramp Bass by 이환국 Drums by 김영만 Piano by 이진주 Sub Piano by Seo Mary