YB (Yoon Do Hyun) and Lena Park (Park Jung Hyun) have just released their first duet single “December”.

On November 19, the two singers released an acoustic version of “December”, a remake version of Turbo’s hit single of the same title. The single serves as the theme song for their upcoming ‘That Winter: 2013 YB + Park Jung-hyun Concert’ slated to open on December 23 and 24 at Jamsil Indoor Stadium.

Check out the short MV and full audio below: