Hyakkaou Academy is a school only for the most fabulously wealthy teens in Japan. But here, only one thing determines your true worth – your skills at gambling. When they’re not in classes, students challenge each other to high stakes games with far more than just cash on the line. If the loser can’t pay up, they’re reduced to a “house pet” and treated like a slave until they can return the staggering amount of money they owe.

Overseeing all of this madness is the Student Council, which is stacked with the best gamblers in the whole school. And at the very top is Kirari Momobari, who leads the council with cold precision. But when new transfer student Yumeko Jabami suddenly starts beating them one by one at their own twisted game, they become determined to cut her down.