Majin Devil is the connection of two stories. It begins with a young gang member who is transformed into a monster by the Majin Devil. The second is the story of how one boy genius uses his intellect to defeat the Majin Devil with the help of some allies he meets along the way.

Majin Devil is the connection of two stories. It begins with a young gang member who is transformed into a monster by the Majin Devil. The second is the story of how one boy genius uses his intellect to defeat the Majin Devil with the help of some allies he meets along the way.