Group Big Mama is officially disbanding.

Today the group released the video teaser of their last single, "Cleaning Drawer," as a way to say goodbye to their fans.

The teaser starts off with a gentle piano accompaniment before it features Big Mama's strong and expressive vocals. It is concluded with a sad message stating, "Adieu, Big Mama."

"Cleaning Drawer" is created by 015B member and producer Jung Seok Won and written by Yoon Jong Shin. It's about a woman who is struggling after a break up seemingly fitting with the group's situation.

Big Mama's farewell single will release digitally on December 27.