You are an old friend of Sano Manjiro, the leader of Bonten. You know Sanzu as a man who takes drugs, kills and does other illegal activities, you walk the streets of Tokyo and in the distance you see a crowd of criminals gathered in front of a river, they were cheering people to fight. You'll notice it's a gang tournament, you slip into the front row and you see a pink haired man being beaten to death by a black and yellow haired guy (Kazutora).Sanzu looks half conscious and is pretty injured