Jjang-gu joins "Monster," a violent organization at his high school. As a rite of passage, he learns a lesson about being a man while following the course.
정우
as Jjang-gu
황정음
as Joo hee
양재영
as Heo
손호준
as Young Ju Kim
Kwon Jai-hyun
as Suk chan Kang
유재명
as Teacher Moon Hak-jong
이유준
as Ddeuk
Kim Hee-jin
as Doctor
Hyeong-gi Kim
as Young-bae's Father
