Sim Hee-seop
Dong-jun
Hong Xa-bin
Young Dong-jun
Shin Joo-hyup
Young Kang-hyeon
Kim So-hee
Young Dong-hee
Kang Chae-yun
Yeong-ji 1
Kim Joo-ryoung
Dong-jun's Mother
Kim Hak-sun
Dong-jun's Father
Kwon Ji-woo
Ju-ho
Ok Ji-young
Yun-ju
Kwon Dong-ho
Seong-il
Song Chang-eui
Kang-hyeon
Woo Mi-hwa
Academy director
Gwak Jeong-gil
Elderly Man in Room 502
An Min-young
Dong-jun's Stepmother
