An expelled boxing champion, who now is a high-school teacher, witnesses intolerable violence and throws her first punch to build justice against it, while putting on a mask.
So Si-min
Han Su-gang
Ko Jin-hyoung
So Young-taek
Lee Jae-gyeong
Jin-hyoung's Grandmother
Seo Sang-woo
Lee Gwon-joong
Byeong-jin
Lee Moon-gi
Park Jung-ho
Kim Jeong-gyu
Byun Jae-hyeok
Song Eun-gyo
Min-ji
Head Teacher
English Teacher
Math Teacher
Principal
Hye-gyeong
Chauffeur
Costume manager
Min-seung
