O.WHEN

- How To Say
- Suspicious Partner Original Soundtrack Pt.2 - Single · 2017
- Heartbeat
- Encounter, Pt. 5 (Original Television Soundtrack) - Single · 2018
- Mystic World
- 여우각시별 (Music from the Original Tv Series), Pt. 5 - Single · 2018
- Sunset Village
- Once Upon a Small Town (Original Television Soundtrack) Special · 2022
- Let Go of All the Trace of Time
- 015B Anthology Part.3 - Single · 2017
- Today
- When I Begin - EP · 2016
- Mystic World (Instrumental)
- 여우각시별 (Music from the Original Tv Series), Pt. 5 - Single · 2018
- Picnic
- When I Begin - EP · 2016
- 너의 노래를 들려줘
- I Wanna Hear Your Song Pt. 2 (Original Television Soundtrack) - Single · 2019
- Cause It's First Time
- When It Loves - EP · 2018