On March 9th, CJ E&M Music and tvN's 'Cross' announced that the Momoland members will be singing the 5th OST for the currently airing drama. According to those who worked on the track with the two members, Ahin and Taeha impressed with their mature vocals which added another layer of sadness to the track, despite their young ages. 

'Cross' OST Part 5 is set to release on March 13 on various music sites.