[윤세웅_편지] 보도자료 [Credit] Track 1 살아보니까 Vocal: 윤세웅 Background Vocals: 윤세웅, 신명준 Composed by 윤세웅 Lyrics by 윤세웅 Arranged by Heven Drum & Bass by Hosu Piano by illrang E. Guitar by 윤세웅 Recording by 최성칠 at Heven Music Mix & Mastering: 정기운 Track 2 편지 Vocal: 윤세웅 Composed by 윤세웅 Lyrics by 윤세웅 Arranged by 윤세웅 Piano by 박성유 Recording by 최성칠 at Heven Music Mix & Mastering: 정기운 Album Cover Photo by 페리윙클 Model: 조소영