프린 (Prin), 최용원 – 마술처럼
Track 01 from Single "너와 나의 눈높이 OST"
Release Date: 2022.07.03
최용원 – I Will (모나토에스프리 Theme) (Vocal Yuri)
Track 09 from Album "Before 2012 : Part.1 Choi Yong Won Works"
Release Date: 2012.06.19
최용원 – Song For You (Vocal 정윤돈)
Track 07 from Album "Before 2012 : Part.1 Choi Yong Won Works"
Release Date: 2012.06.19
최용원 – 이곳은 이면세계(with 방연지, 홍범기, 황창영 )
Track 12 from Album "극장판 반지의 비밀일기 OST"
Release Date: 2019.09.05
최용원 – All I Have (해브온라인 Theme) (Feat. 루비스타)
Track 06 from Album "Before 2012 : Part.1 Choi Yong Won Works"
Release Date: 2012.06.19
최용원 – 안녕 엘라 (with 한수연)
Track 01 from Single "안녕 엘라 OST Part.1"
Release Date: 2020.09.21
최용원 – 내 이름은 반지 (with 한수연)
Track 01 from Album "극장판 반지의 비밀일기 OST"
Release Date: 2019.09.05
최용원 – 미안하다 사랑한다 (애니 ‘미안하다 사랑한다’ Theme) (Vocal 더원)
Track 05 from Album "Before 2012 : Part.1 Choi Yong Won Works"
Release Date: 2012.06.19
최용원 – 리드모스 (Rhythmos Theme) (Vocal 티아)
Track 02 from Album "Before 2012 : Part.1 Choi Yong Won Works"
Release Date: 2012.06.19