This drama is based on the 2001 Korean movie My Boss My Hero. Tomoya Nagase plays 27-year old Makio Sakaki, the son of Yakuza boss who controls the entire Kanto area. Being the heir, the future of the organization has been promised to Makio, but there's one problem - he's too stupid! So Makio gets sent to high school to get his diploma, and he has to adjust to his new life as a high school student.