ISU

- Delete (with ISU)
- With - EP · 2024
- My Way
- 돈꽃 (Original Television Soundtrack), Pt.1 - Single · 2017
- Foolish Heart
- 개와늑대의시간 TIME BETWEEN DOG AND WOLF · 2007
- A Long Sleep
- Lovers of the Red Sky (Original Soundtrack) · 2021
- Sequence
- Inhale - EP · 2017
- Person That Lives In My Heart
- SBS Drama Brilliant legacy (Original Television Soundtrack) · 2009
- 사랑해요
- 사랑해요 - EP · 2008
- Everlasting Love
- Saimdang, Memoir of Colors (Original Television Soundtrack), Pt. 6 - Single · 2017
- Umm
- Umm - Single · 2024
- Recommend
- Inhale - EP · 2017
- Here
- Inhale - EP · 2017
- Easy
- Inhale - EP · 2017
- 눈물은 마른데도... (MAIN THEME)
- Cain and Abel (Original Soundtrack) · 2009

FRIENDLY+n page1. - EP

FRIENDLY+n page1. - EP

2024
Umm - Single

Umm - Single

2024
Lovers of the Red Sky (Original Soundtrack) Part.6 - Single

Lovers of the Red Sky (Original Soundtrack) Part.6 - Single

2021
Your Lights (Bike guys [Original Television Soundtrack], Pt.1) - Single

Your Lights (Bike guys [Original Television Soundtrack], Pt.1) - Single

2021
닥터프리즈너 (Original Television SoundTrack), Pt. 4 - Single

닥터프리즈너 (Original Television SoundTrack), Pt. 4 - Single

2019
돈꽃 (Original Television Soundtrack), Pt.1 - Single

돈꽃 (Original Television Soundtrack), Pt.1 - Single

2017
Inhale - EP

Inhale - EP

2017