O.WHEN

- How To Say
- Suspicious Partner Original Soundtrack Pt.2 - Single · 2017
- STAY
- Angel's last mission : love (Original Television Soundtrack) · 2019
- Goodbye
- Goodbye - Single · 2023
- As Your Mind Goes
- Mood Night - EP · 2021
- Call Me Now
- Call Me Now - Single · 2016
- Let Go of All the Trace of Time
- 015B Anthology Part.3 - 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
- Mystic World
- 여우각시별 (Music from the Original Tv Series), Pt. 5 - Single · 2018