At the prestigious Hyakkaou Private Academy, where gambling rules all, the student council led by Kirari Momobami announces its dissolution and the start of a general election. With one vote per student, everyone is given a chance to aim for the top of the academy. As the chaos unfolds, the Hundred Devouring Families — tied to both Kirari and Yumeko Jabami — emerge as a new threat. Ryota, Mary, and Itsuki, who have grown close to Yumeko, must now fight for their beliefs. Will they become prey — or rise as the predators of the ecosystem?