Get ready to rumble! 3, 2, 1!
A former medalist who is now a troublemaker physical educations teacher and a natural born rebel take a satisfying whack at life.
Jin Sun-kyu
Si-heon
Sung Yoo-bin
Yoon-woo
Oh Na-ra
Il-sun
Ko Chang-seok
Principal
Jang Dong-ju
Hwan-ju
Ko Kyu-pil
Man-deok
Kim Min-ho
Bok-an
Lee Jong-hwa
Gao
Choi Hyung-tae
Bok-co
Cho Jung-hun
Jody
Tae In-ho
Song Hee-cheol
Cha Soon-bae
President
