Classy (/ˈklæsi/; Korean: 클라씨; RR: Keullassi; stylized as CLASSy or CLASS:y) is a South Korean girl group formed through the MBC reality competition show My Teenage Girl and co-managed by M25, a subsidiary of PocketDol Studio, and Universal Music Japan.

It was inspired by the members' "classy" charms and continued the school-related theme of My Teenage Girl, referencing "class" and "highest grade".

[1] Classy was formed through the MBC reality competition show My Teenage Girl which aired from November 28, 2021, to February 27, 2022.

[14] On November 22, it was announced Classy will participate as a contestant in second season of the SBS reality competition show Dancing Dol Stage.

[15] On December 21, it was announced that Classy would return with their second Japanese single titled Target and hold their first fan concert in Japan in February 2023.