My Boss My Hero

The show is about Makio Sakaki , also known as "Tornado", a 27-year-old yakuza, who wants to succeed his father at the head of the gang. But Makio is a little dumb, so his father decides to send him back to high school and makes a deal with him: if he can graduate he can become the new leader of the gang. If Makio doesn't graduate, the position of boss will be given to his younger brother, Mikio. And that is how the hero goes back to school, hiding his identity and age.