Hoshina is a woman working as a university staff member. One day she falls from a cliff and should have suffered serious injuries, but her wounds inexplicably heal on their own. Around the same time, she encounters a man named Atsumi, who introduces himself as a professor at the same university. There is something unsettling and magnetic about him, and he seems to already know things about her that he should not. Soon after their meeting, Hoshina begins experiencing strange physical reactions in his presence, her body growing hot and restless as if driven by an instinct she cannot control.

Atsumi is not an ordinary man. He is a wolf beastman, a supernatural being who has lived hidden among humans. The connection between them is not coincidental Hoshina is his fated mate, a bond recognized by beastman instincts. As they grow closer, Atsumi's protective and possessive nature emerges, and the two begin living together. Their relationship is intense and physical, driven by the unavoidable pull of the mating bond, but it is also complicated by the differences between their worlds.

Hoshina struggles with Atsumi's jealousy and possessiveness, and her desire for independence leads to friction. When she goes out with colleagues to an idol cafe, she walks into a trap set by fox beastmen who capture her with the intent to harm. Atsumi rushes to rescue her, and the ordeal forces both of them to confront the dangers that come with being entangled in the hidden world of beastmen.

As their relationship deepens, the couple travels together and Hoshina learns more of Atsumi's secrets, including a truth about his body that emerges after one of their most intense nights together. A threat tied to his beastman nature begins to manifest, testing their bond. Despite the growing peril, the two fight against fate itself, determined to hold on to the love and connection they have built.