fromis_9 (프로미스 / 프로미스나인), an initialism for ‘From Idol School’, consists of 8 members: Saerom, Hayoung, Jiwon, Jisun, Seoyeon, Chaeyoung, Nagyung, and Jiheon. They were created through the survival program Idol School. They officially debuted on January 24, 2018, under Stone Music Entertainment.