Narasina City. There is a gang group who always fight viciously to win something. Their goal is to get the ‘legacy’ left at the post of the Japanese Self-Defence Forces left by the famous group of bikers ‘Kanto-Mugen-kyo’ called the ‘infinity gold’ that only the top person in Narasina can hold. The leader of Nishimarugumi his name is ‘NIjimaru Jun’ and his friend  Hakuro Shomaru, also has the same goal. They make a promise to achieve the goal of ‘becoming the top of Narasina to take the legacy’ and fight with other gang groups to win over the legacy.