In the past, humanoid bears coexisted with humans. However, a meteor shower that fell onto Earth had a strange effect on bears throughout the world: they suddenly became violent and hungry for human flesh, spurring an endless cycle of bloodshed in which bear ate man and man shot bear, forgetting the lively relationship they once had. The "Wall of Severance" was thus built, separating the two civilizations and keeping peace. Kureha Tsubaki and Sumika Izumino are two lovers attending Arashigaoka Academy, who, upon the arrival of two bears that have sneaked through the Wall of Severance and infiltrated the academy, find their relationship under a grave threat. The hungering yet affectionate bears, Ginko Yurishiro and Lulu Yurigasaki, seem to see the bear-hating Kureha as more than just another meal, and in getting closer to her, trigger an unraveling of secrets that Kureha may not be able to bear. When their relationships provoke the Invisible Storm, a group that keeps order within the ideological school, the girls must stand on trial with their love, embarking on a journey of self-discovery en route to attaining true love's "promised kiss."

The original video anime episode will serve as the final chapter to the television series, focusing on the rivalry between the "background character" Amatsuyu Kisaragi (Jouro) and Yasuo Hazuki (Hose), "the protagonist."

The story centers around an illness-stricken, constantly bullied orphan girl named Minori. After one rainy day, she doesn't turn up at school, having been admitted into a hospital in a distant town. Two months pass, and the girl's two school friends, Takashi and Kyouko, receive a mysterious email with no sender listed. The email reveals a summer festival taking place at a nearby town...

At Academy Island, everything is settled through "Games" waged for a certain number of stars, with the strongest student being granted the ranking of Seven Stars. Hiroto, a transfer student, unexpectedly beats the strongest empress and becomes the pseudo-strongest in the school! A mind game of lies and bluffs begins!