When a number of biker gangs ranging from small to large started to appear in Yokohama, Hiromi Katayama united them at the risk of his own life. Set in the present, this OAV tells the story of Toshi Ikeda, a young rookie who returns to Yokohama to join Katayama's group. There, he will encounter an old friend and things will turn violent when the yakuza gang Mad Emperor attacks them.

Yokohama Meibutsu Otoko Katayama Gumi!

A school comedy about a mute transfer student, Tadashi Iketo, who is constant­ly shuffled from school to school for his "violent nature," though he really is a mild-mannered boy constantly taunt­ed into fights over his simian appearance.