Eita Kidou's parents' adultery not only caused his family to split apart, but also left him skeptical of love. Eita, who has no desire to pursue romance, focuses his whole high school career to his academics in order to become a doctor. It didn't take long for the lovely and well-liked Masuzu Natsukawa to discover Eita's disinterest. Tired of being the target of other people's devotion, she urges him to pretend to be her lover, since she, too, is repulsed by the concept of love. Eita, on the other hand, refuses—but Masuzu has one more trick in her sleeve: stealing Eita's diary and threatening to publish the embarrassing content online if he does not agree. Now involved in a phony affair with the most desirable girl in school