December

- I'll be there
- CS NUMBERS, Vol. 5 · 2010
- Because of love
- A Story To The Sky · 2009
- The Only I can Give You Is Love
- Reply 1988 (Original Television Soundtrack) · 2015
- Sad day
- A Story To The Sky · 2010
- If we love again
- A Story To The Sky · 2010
- 누구보다 널 사랑해
- Cho Young Soo+All Star_December - Single · 2011
- She’s Gone
- CS NUMBERS, Vol. 5 · 2012
- 안녕
- Tears - Single · 2011
- Beautiful Woman
- CS NUMBERS, Vol.7 - EP · 2011
- Stay there (feat. IRIN & Yunmi)
- INTRODUCTION - EP · 2011

Miracle with eunyoung - Single

Miracle with eunyoung - Single

2025
She's Gone (Remake) [feat. Lee JinE] - Single

She's Gone (Remake) [feat. Lee JinE] - Single

2023
I'll give you everything - Single

I'll give you everything - Single

2022
Love is like watchings stars with you - Single

Love is like watchings stars with you - Single

2021
CS Numbers - Single

CS Numbers - Single

2021
The Song - Single

The Song - Single

2021
In Place - Single

In Place - Single

2020