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심희섭

Dong-jun

홍사빈

Young Dong-jun

신주협

Young Kang-hyeon

Kim So-hee

Young Dong-hee

강채윤

Yeong-ji 1

Ким Джу-рён

Dong-jun's Mother

Ким Хак Сон

Dong-jun's Father

권지우

Ju-ho

옥지영

Yun-ju

Квон Дон Хо

Seong-il

송창의

Kang-hyeon

우미화

Academy director

곽정길

Elderly Man in Room 502