December is the duo of male singers Yunheok and DK, singing with pop and ballad styles. The duo is signed with Happy CS Entertainment.
The two began in October 2009 with the single "Dear My Lover."
- Dear My Lover [October, 2009]
- Tears In Heaven [May, 2010]
- Once Upon A Time (OST) [May, 2010]
- Honesty [March, 2010]
- IRIS OST Part 5 [December, 2009]