송중기
Wolf-Boy / Chul-soo
Park Bo-young
Young Sun-yi / Eun-ju
유연석
Ji-tae
이영란
Sun-yi
장영남
Sun-yi's Mother
김향기
Sun-ja
유승목
Professor Kang Tae-shik
Shin Bi
Dong-mi
우정국
Mr. Jung
구본임
Mrs. Jung
Lee Jun-hyeok
Policeman
Soel Oh-shin
Thug 1 (uncredited)
Han Min-hik
Thug 2 (uncredited)
Chuay Kwong-lak
Thug 3 (uncredited)
