The One

- A Winter Story
- That Winter, the Wind Blows (Original TV Series Soundtrack), Pt. 2 - Single · 2013
- Beautiful World
- Hooxi, The Beginning · 2016
- 그 남자
- <나는 가수다 2> 9월 B조 경연 / 1집 - EP · 2012
- 사랑아
- Who Is the One, I Am the One! · 2014
- 그대이기에
- 엽기적인 그녀 (Original Soundtrack) · 2017
- 아시나요
- <나는 가수다 2> 9월의 가수전 · 2012
- Close To You
- Saimdang, Memoir of Colors (Original Television Soundtrack), Pt. 3 - Single · 2017
- A Winter Story (Instrumental)
- That Winter, the Wind Blows (Original TV Series Soundtrack), Pt. 2 - Single · 2013
- 잘있나요
- Gu Family Book, Pt. 6 (Original Television Soundtrack) - Single · 2013
- Together
- Hometown Sounds (Original Soundtrack) - Single · 2018