At this high school, instead of jocks and nerds, the students are divided into predators and prey. At a high school where the students are literally divided into predators and prey, friendships maintain the fragile peace. Who among them will become a Beastar-a hero destined to lead in a society naturally rife with mistrust? Dwarf rabbit Haru has been abducted by Shishi-gumi, a gang of rogue lions infamous for torturing, murdering and devouring herbivores.

The mayor offers to help, but can he be trusted when he himself is a lion? Meanwhile, Legoshi tracks Haru's scent, determined to rescue her at any cost, while Haru both defies her captors and tries to accept her fate. Elsewhere, red deer Louis is faced with a terrible temptation...