With Monji’s graduation approaching quickly, he gets into trouble with his teacher, Mr. Anan about his attitude. While everyone else thinks about their futures, a Yanki (Japanese delinquent) boss from Kanagawa Juvenile detention center comes to settle an old score with Mr. Anan.
Monji Mori receives a sudden goodbye letter from his friend Rei. As the Black Skull Gang continues to pursue national conquest, they meet Manta, a Kansai Yanki (Japanese delinquent) Boss, and Mina, a girl who seems to have taken a special interest in Monji.
High school Yanki (Japanese delinquent) boss, Monji Mori, decides to make his mark at Kabukicho, infamous for organized crimes, as his first step in conquering Japan. In the process, he makes a new enemy and needs his Black Skull Gang to avenge him.
Hideo Aiba (Atsuji Ninomiya) is a reserved and obedient high school student, who has never had any girlfriend. He spends all his energy on masturbating, his true reason for living. His life and his solitary activities will take a radical change when a new transfer student, the sexy Kurumi Sahana (Akane Suzuki), joins his class.
