On screen
Cast
21 credited performers
Bada
Self - Vocal Trainer
Stephanie Kim
Self - Music Producer
Lee Soon-jae
Self - Principal
Kim Hee-chul
Self - Homeroom Teacher
Lee Hae-in
Self - Contestant
Natty
Self - Contestant
Jo Yuri
Self - Contestant
Jang Gyu-ri
Self - Contestant
Lee Na-gyung
Self - Contestant
Lee Sae-rom
Self - Contestant
Song Ha-young
Self - Contestant
Park Ji-won
Self - Contestant
Roh Ji-sun
Self - Contestant
Lee Chae-young
Self - Contestant
Baek Ji-heon
Self - Contestant
Y:SY
Self - Contestant
Lee Young-yoo
Self - Contestant
Joo Se-Bin
Self - Contestant
Lee Si-an
Self - Contestant
Herin Seo
Self - Contestant
Tasha Low
Self - Contestant