O.WHEN

- How To Say
- Suspicious Partner Original Soundtrack Pt.2 - Single · 2017
- Loser
- When the Camellia Blooms (Original Television Soundtrack), Pt.2 - Single · 2019
- Today
- When I Begin - EP · 2016
- Cause It's First Time
- When It Loves - EP · 2018
- Wonder Hole
- When I Begin - EP · 2016
- Mystic World
- 여우각시별 (Music from the Original Tv Series), Pt. 5 - Single · 2018
- STAY
- Angel's last mission : love (Original Television Soundtrack) · 2019
- How To Say (Acoustic Version)
- Suspicious Partner (Original Soundtrack) · 2017
- Someday
- When I Begin - EP · 2016
- Feeling (Inst.)
- A Poem a Day, Pt. 2 (Original Soundtrack) - Single · 2018