Vocal duo December, whose members enlisted into the military this year, turns out to have prepared a special present for their fans before their enlistment!

The duo pre-recorded a song called "Fire" ahead of time, working with composer Jun Hye Sung. 

The song since of a first love and it memories, so take a listen through the MV for it above! The members have also each sung their individual versions of the song, so check those out through the playlist below.

SEE ALSO: Former December's Yoon Hyuk faces 10-year prison sentence for fraud