CLASS:y (클라씨) is a 7-member girl group formed through the MBC survival show ‘My Teenage Girl.‘ The group is managed by M25 for Korean promotions and Universal Music Japan for Japan promotions. The aim of the group is to have potential to chart on the Billboard charts. The members consist of: Hyungseo, Chaewon, Hyeju, Riwon, Jimin, Boeun and Seonyou. They debuted on May 5, 2022, in Korea with the mini album, “Y: CLASS IS OVER” and “Z: LIVES ACROSS”. They debuted in Japan on June 22, 2022.