The One (더원) – 그대 내 품에 (원곡가수 유재하)
Track 01 from Single "음악여행 예스터데이 9회"
Release Date: 2014.04.14
The One (더원) – 사랑하는 그대에게
Track 01 from Album "용팔이 OST"
Release Date: 2015.09.30
The One (더원) – 그대라서
Track 05 from Album "호텔킹 OST"
Release Date: 2014.07.25
The One (더원) – My Love Song (Original Ver.)
Track 18 from Album "싸인 OST"
Release Date: 2011.02.24
The One (더원) – My Love Song (Drama Ver.)
Track 08 from Album "싸인 OST"
Release Date: 2011.02.24
The One (더원), 펀치 (Punch) – 아프다니까
Track 01 from Single "아프다니까"
Release Date: 2014.01.07