Boy band Treasure released a Christmas version of one of its songs that was featured on the soundtrack for the web drama series “The Mysterious Class” (2021) on its social media accounts on Friday.

The song is titled “BFF (Happy Christmas ver.),” and the original song was used in the first episode of the show in November.

“Treasure’s Hyunsuk has been working hard to produce new songs to widen his spectrum as an artist,” the band’s agency YG Entertainment said. “Hyunsuk composed ‘BFF’ along with composer Q.”

“The Mysterious Class,” which stars all 12 members of Treasure, is a mystery thriller where a group of classmates at Treasure High School try to find who the ghost is in their class. The show is uploaded on Treasure’s official YouTube channel every Friday.

Treasure debuted in August 2020 with the song “Boy.” The band was formed through audition show “YG Treasure Box,” which was broadcast by JTBC in 2019.

BY SHIN MIN-HEE [shin.minhee@joongang.co.kr]