Golden Guy 

A violent mystery of Gokudo X Tokugawa's buried treasure! Kai Sakurai is the leader of the Daibutsu gang, part of the Kametsuru crime family, a yakuza organization based in Yokohama. He was content leading his small, idiosyncratic group until a young member of the gang was killed. In the shadows lurked the Akane clan, rivals to the Kametsuru clan. And then there were the rumors about the existence of the "Tokugawa Buried Treasure"....... A jarring story of desire, violence, and fate, opens with a bang!