The head of the Hotei-gumi, the largest yakuza organization in the Kansai region, declares that within six months he will name a successor from his twin sons, Rin and Rui. To test them, he splits the syndicate into two rival factions, each twin leading one group. The twins are opposites: Rin is calculating and forward-thinking, pursuing creative and modern sources of income, while Rui is more traditional and ruthless, clinging to the old ways of the underworld. Their cold hatred for each other is palpable, but the competition is complicated by a charged, taboo intimacy between them that flickers beneath the violence. A new recruit is drawn into the inner circle and tasked with observing both brothers and reporting back, effectively holding the key to the succession. The six-month countdown forces the twins to escalate their schemes, leading to betrayals, brutal confrontations, and a series of startling revelations that blur the line between loyalty and blood. The narrative arc moves from the initial cold war between the twins to open conflict, with the father’s motives remaining opaque until the final confrontation. The story weaves suspense, gory yakuza violence, and psychological tension around the central question of who will inherit the empire—and at what cost.