HowL

- Perhaps Love
- Princess Hours (Original Television Soundtrack) · 2006
- Love U
- 꽃보다 남자 Best Collection (Original Television Soundtrack) · 2009
- Mr. Queen
- Mr. Queen (Original Television Soundtrack) · 2021
- Iron Tango
- Mr. Queen (Original Television Soundtrack) · 2021
- Palace
- Mr. Queen (Original Television Soundtrack) · 2021
- Perhaps Love (Remix Version)
- Princess Hours (Original Television Soundtrack) · 2006
- Sweet Sorrow
- Love to Hate You (Original Soundtrack from the Netflix Series) · 2023
- Miracle
- 궁S (Original Television Soundtrack) · 2007
- 눈물꽃
- 바람의 화원 (Original Television Soundtrack) · 2008
- 사랑인가요 (Ivy Mix) [feat. J]
- Ivy Mega Mix 2006 · 2006
- Sudden Twist (Instrumental)
- 제4차 사랑혁명 (Original Sound Track) Final · 2025
- Clickity Boom (Instrumental)
- 제4차 사랑혁명 (Original Sound Track) Final · 2025
- 4th Protocol (Instrumental)
- 제4차 사랑혁명 (Original Sound Track) Final · 2025

바람의 화원 (Original Television Soundtrack)

바람의 화원 (Original Television Soundtrack)

2008
90 DAYS TIME FOR LOVE (Original Soundtrack)

90 DAYS TIME FOR LOVE (Original Soundtrack)

2006

고봉실 아줌마 구하기 (Original Television Soundtrack) - Single

고봉실 아줌마 구하기 (Original Television Soundtrack) - Single

2012
버디버디, Pt. 2 (Original Television Soundtrack) - Single

버디버디, Pt. 2 (Original Television Soundtrack) - Single

2011
버디버디 (Original Television Soundtrack) Pt. 1 - Single

버디버디 (Original Television Soundtrack) Pt. 1 - Single

2011
Romance Town, Pt. 4 (Original Soundtrack) - Single

Romance Town, Pt. 4 (Original Soundtrack) - Single

2011
Ro맨틱? No맨틱! Pt. 2 : 아끼지 말아요 - Single

Ro맨틱? No맨틱! Pt. 2 : 아끼지 말아요 - Single

2010
태양을 삼켜라 (Original Television Soundtrack), Vol. 2 - EP

태양을 삼켜라 (Original Television Soundtrack), Vol. 2 - EP

2009