Once, humans lived alongside humanoid bears in harmony. However, a meteor shower caused a strange transformation in bears worldwide. They turned aggressive and developed a taste for human flesh, sparking a brutal cycle of violence. Humans had to erect the "Wall of Severance" to keep bears away from them and maintain peace. Arashigaoka Academy's Sumika and Kureha are in love, but their relationship is jeopardized when two bears infiltrate the academy. The bears are Ginko and Lulu, who have an affectionate yet insatiable hunger for Kureha. Their hunt for her unravels secrets Kureha may not be able to bear. Their relationship stirs up trouble with the school's ideological group, the Invisible Storm, and they must defend their love. In doing so, they embark on a journey of self-discovery to attain their promised kiss of true love.