The Phantom Dragon Book 2: The Honest Price

Kamurocho, the city of pleasure and decadence, has been rocked to its core in the wake of the Kamoshida incident. Rumors of a hero in the underworld are breaking out into civilian life, and all have been affected by the actions of a mysterious young yakuza. Akira Kurusu will be united with new allies and face down new foes as the underworld prepares for war. Family is everything.