하연수 – 토닥토닥
Track 01 from Single "사이 : 여우비 내리다 OST"
Release Date: 2014.12.23
하연수, 강하늘, 김초은 – 아틀란티스 소녀
Track 01 from Single "몬스타 OST Part 3"
Release Date: 2013.06.01
용준형, 비투비, 하연수 – 지난 날
Track 01 from Single "몬스타 OST Part 1"
Release Date: 2013.05.17
Be One with Kpop - with Lyric
Track 01 from Single "사이 : 여우비 내리다 OST"
Release Date: 2014.12.23
Track 01 from Single "몬스타 OST Part 3"
Release Date: 2013.06.01
Track 01 from Single "몬스타 OST Part 1"
Release Date: 2013.05.17
Track 03 from Album "몬스타 OST"
Release Date: 2013.08.09
Track 01 from Album "몬스타 OST"
Release Date: 2013.08.09