Heaven and Hell, the two places centered around Earth. Takumi and Kano, the new princes of Hell have overthrown Satan. However, they have become bored with their recent rise to power. They hatch a plot to begin a small game between them. The rules are simple, create two humans, let them find each other and kill each other. However, it seems that darker plots are hatching behind the scenes. Thrusting both Takashi and Kisagi into a new world to experience. A war between Heaven and Hell is brewing. But when will it finally boil over?