Yoseob and Gayoon will releasing an OST for MBC's 'The Night Watchman'.

According to an official broadcaster on September 24th, Beast's Yoseob and 4Minute's Gayoon finished the recording for the new OST on the 23rd. The song will be used as a background theme to represent the sad love between a man and a woman.

This isn't the first time the two has sung together since Yoseob and Gayoon previously covered G.Na and Rain' duet 'If You Want A Lover' back in 2010.

The new OST will be premiered in the episode broadcasted on September 29th.