[CREDITS] 1. 아이 (feat. 민서) Produced by Xydo, YOOSEOK Lyrics by Xydo Composed by Xydo, YOOSEOK Arranged by Xydo, YOOSEOK Piano by Steven Guitar by Branden, 조정현 Bass by YOOSEOK String Arrangement by YOOSEOK Mixed by 최민성 @TONESTUDIO SEOUL Mastered by 권남우 @821 Sound