The winning members of MBC's idol survival program 'My Teenage Girl', CLASS:y have dropped a unique teaser film for their spring debut.

The teaser film, titled 'CLASS:y's Universe', invites fans to explore CLASS:y's debut slogan, "We customize our own". The CLASS:y members can be seen "customizing" each of their own, unique performances as they prepare for their debut, honing their skills with passionate energy. 

Meanwhile, the members of CLASS:y include Won Jimin, Kim Seonyou, Myung Hyungseo, Hong Hyeju, Kim Riwon, Park Boeun, and Yoon Chaewon. The team is expected to debut some time in April.