「桜道会」東日本最大の広域暴力団である。その桜道会は今や、川地組組長川地幸一派と、甲斐組二代目組長石川喬の二派に分裂しつつあった。石川は竜を自分のものにしようと、竜を相手に全てを賭けての麻雀勝負を始めた。これは先代組長甲斐正三の意志であった。しかし、竜は冷たくつぶやく「あんた、背中が煤けてるぜ！」。そして…。
The Sakurado-kai is the largest regional gang in eastern Japan. The Sakurado-kai is now splitting into two factions: Kawachi Yuki, head of the Kawachi-gumi, and Ishikawa Takashi, second-generation head of the Kai-gumi. Ishikawa wants to make Ryu his own, so he starts a mahjong match with Ryu, betting everything on the outcome. This was the will of the previous head, Kai Shozo. However, Ryu coldly mutters, "Your back is soot!" And then...
