Seo In Guk

- Even If There's No Miracle
- Death's Game Original SoundTrack Part.2 - Single · 2023
- Distant Fate
- Doom at Your Service (Original Television Soundtrack), Pt. 7 - Single · 2021
- All for You
- Reply 1997 - Love Story, Pt. 1 (Original Television Soundtrack) - Single · 2012
- 꽃
- 내일 그대와 (Original Television Soundtrack), Pt. 1 - Single · 2017
- Seasons of the Heart
- Seasons of the Heart - Single · 2016
- With Laughter or with Tears
- With Laughter or with Tears - EP · 2013
- Don‘t Be Jealous
- THE X - EP · 2023
- Tease Me
- Perfect Fit - EP · 2012
- 부른다
- 부른다 - EP · 2009
- No Matter What
- Master's Sun (Original Television Soundtrack), Pt. 7 · 2013