송중기

Wolf-Boy / Chul-soo

박보영

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

이준혁

Policeman

서동수

Army Colonel (uncredited)

구교환

Drunk Man (uncredited)

김은숙

Military Chief (uncredited)

이민웅

Dr. Kang's Assistant (uncredited)

남정희

Dong-suk's Grandmother (uncredited)

안도규

Dong-suk (uncredited)

김종구

Sun-yi's Father (uncredited)