Lee Jong-hyuk
Cha Jong-hoon
Kim Dong-young
Young Hyeon-su
Cho Jin-woong
Yasaengma Gang Member
Lee Gyu-ho
Yasaengma Gang Leader
Kim Byung-choon
Choi Byeong-sam
Kwon Tae-won
English Teacher
Cheon Ho-jin
Hyeon-su's Father
Lee Hyeon-seok
Hyun-soo's Mother
Jun Sung-ae
Jong-hoon's Mother
Yang Han-seok
P.E. Teacher
Park Soo-young
Politics & Economics Teacher
Lee Gun-moon
Korean crow-tit's gang