Once Upon a Time in High School
Yoo Ha
Director
Lee Jong-hyuk
Cha Jong-hoon
Baek Joo-hee
Student
Ahn Nae-sang
Teacher
Kim Beong-choun
Choi Byeong-sam
Cheon Ho-jin
Hyeon-su's Father
Park Soo-young
Politics & Economics Teacher
Kim In-kwon
Jiksae
Kim Dong-young
Young Hyeon-su
Seo Dong-won
Seong-hun
Kwon Sang-woo
Hyeon-su
Lee Jung-jin
Woo-shik
Han Ga-in
Eun-ju
Park Hyo-joon
Ham Jae-bok
Cho Jin-woong
Yasaengma Gang Member
Lee Gyu-ho
Yasaengma Gang Leader
Baek Bong-ki
Cheetah
Kwon Tae-won
English Teacher
Lee Hyeon-seok
Hyun-soo's Mother
Jun Sung-ae
Jong-hoon's Mother
Yang Han-seok
P.E. Teacher
Kim Bu-seon
Boniface
Lee Jang-woo
Student
Lee Geon-moon
Korean crow-tit's gang
