2017: Idol School and fromis_9
The group made their official debut on January 24, 2018 with their first mini album To. Heart.
- Idol School (Mnet, 2017) - contestant
- Hayoung's motto from her Idol School profile was: "Don’t forget what’s the most important and let’s do the best".
Community content is available under CC-BY-SA unless otherwise noted.