Eikichi Onizuka (Takashi Sorimachi) is a graduate of a nine-rank university. Not only is his academic performance in a mess, but his past records are also terrible. He used to be a biker gang and a 5th degree karate. In the eyes of ordinary people, he can be said to be a terrifying street thug. But Eikichi has his own dream, which is to be a middle school teacher, because there are countless beautiful girls in the middle school, and Eikichi's eyes often light up when he thinks of this. However, Eikichi tried his best but failed to pass the public school exam, so he ran to a private middle school, Musashino Seirin Gakuen, to apply. Despite strong opposition from people including the Dean of the Academic Affairs Office, Uchiyamada, the school directors who felt deeply about the school's shortcomings felt that it was time for people like Eikichi to challenge traditional education. So, Eikichi was admitted and was photographed as the head teacher of the second-year fourth class, which had the most problem teenagers and no one dared to take over. Eikichi's challenge began!