December의 멤버인 DK와 Rumble Fish a.k.a. 최진이가 함께 발표한 디지털 싱글입니다.
Tracklist
1. 너에게 약속해
2. 너에게 약속해 (Instrumental)
DK - Endless Love (2011)
December - Honesty (2010)
December - Tears In Heaven (2010)
December - Cho Young Soo+All Star (2011)
December - Beautiful Woman (2011)
December - Unfinished (2012)
December & J-Cera - Lonely Night (2010)