Yokohama Meibutsu: Otoko Katayama-gumi!

The city of Yokohama has become a lawless district for biker gangs. One particular gang, the "Crazy Babies", have a 17 year old leader called Hiromi Katayama that is famous throughout the entire Kanagawa alliance as being a strong fighter with a devout sense of morality. However, when a young rookie by the name of Toshi Ikeda wants in, he swears to Katayama that he will uphold the ideals of the Crazy Babies...