Hatori Yuu has a problem that has taken over his school life: a compulsive libido he cannot manage that makes concentration in class nearly impossible. His teacher Takehaya Kaori has noticed his distracted behavior and repeatedly scolded him. She does not know the actual cause—he is deeply attracted to her, which makes her presence the source of his worst symptoms. When she calls him in after school to ask if he is being bullied, the conversation spirals into territory neither of them expected, and a secretive relationship between student and teacher begins.