Episode 4

Bada

Self - Vocal Trainer

Stephanie Kim

Self - Music Producer

Lee Soon-jae

Self - Principal

Kim Hee-chul

Self - Homeroom Teacher

Lee Hae-in

Self

Natty

Self

Jo Yu-ri

Self

Jang Gyu-ri

Self

Lee Nagyung

Self

Lee Saerom

Self

Song Hayoung

Self

Park Jiwon

Self

Roh Jisun

Self

Lee Chaeyoung

Self

Baek Jiheon

Self