My Boss, My Hero

Doosaboo ilchae is a movie starring Jun-ho Jeong, Jeong Woong-in, and Un-taek Jeong. Ignorant Do-shik has to finish high school before taking over the family gangster business. He starts at a private co-ed high school in GangNam,...
When a young gang leader seems to be just a bit too stupid to effectively carry out his daily tasks, his superiors order him to go back to school for his high school diploma. Posing as a 19-year-old, he soon learns that the school is even more corrupt and vicious. Wrath is unleashed.