"Promise now, cherish it preciously. We will grow into your idols! Hello, we are Fromis 9!" fromis_9 (프로미스나인; initialism from from idol school; pronounced as "promise nine") is a nine-member girl group currently under Off The Record Entertainment. Formed through the reality show Idol School, they officially debuted on January 24, 2018 with the mini album To. Heart.
They released the pre-debut single "Glass Shoes" on November 29, 2017.
Their group name stands as a promise to their viewers to be the best girl group.