SUPERSONIC

fromis9 pre-debuted with <Glass Shoes> in 2017 and officially debuted in 2018 with their first album <To.heart>. At the time of debut, the agency was Stone Music Entertainment, which changed to Off The Record Entertainment on September 21, 2018, before moving to Pledis Entertainment on August 16, 2021. After their contract with Pledis ended on December 31, 2024, five members—Song Hayoung, Park Jiwon, Lee Chaeyoung, Lee Nagyung, and Baek Jiheon—signed exclusive contracts with the new agency ASND Entertainment on January 26, 2025.