The most wonderful time of the year is fast approaching, and ATBO want you to be prepared!

The boy group will be returning later this month on November 27 at 6 PM KST with their 1st single album, 'Must Have'. The title track is "Must Have Love", a remake of a holiday duet originally sung by Ga In of Brown Eyed Girls and Kim Yong Joon of SG Wannabe in 2006. ATBO will be introducing a bright and cheery twist to the original number, with members Oh Jun Seok and Bae Hyun Jun taking part in the rap making.

The single album also features "Mayday", "We Might Have Nothing But", and an English Duet version of "Must Have Love", completing a fun, festive K-Pop release to welcome the merry season in December. 

Check out ATBO's latest teasers for 'Must Have' above and below, while you wait for their full comeback at the end of this month!