fromis_9 is a South Korean girl group formed by CJ E&M through the 2017 reality show Idol School. The group's name, pronounced as "promise" in Korean, also means "to keep their promise [to viewers] to be the best girl group". The group is composed of nine members: Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri.