2017
Bada
Vocal Trainer
Stephanie Kim
Music Producer
Lee Soon-jae
Principal
Kim Hee-chul
Homeroom teacher
Lee Hae-in
Natty
Jo Yu-ri
Jang Gyu-ri
Lee Na-gyung
Lee Sae-rom
Song Ha-young
Park Ji-won
Roh Ji-sun
Lee Chae-young
Baek Ji-heon
Lee Seo-yeon
Lee Young-yoo
Joo Se-Bin