Fromis 9 (Korean: 프로미스나인; styled in snake_case as fromis_9) are a South Korean girl group formed through the 2017 reality show "Idol School". The group currently consist of five members: Song Ha-young, Park Ji-won, Lee Chae-young, Lee Na-gyung, and Baek Ji-heon. They originally debuted as a nine-member group, with Jang Gyu-ri departing in July 2022, followed by Lee Sae-rom, Roh Ji-sun, and Lee Seo-yeon in February 2025. The group debuted on January 24, 2018, with the extended play "To. Read more on Last.fm