Okumura is a university playboy who has always resented Karasawa, his more popular and academically superior classmate. Okumura’s irritation grows as Karasawa effortlessly outshines him in both social standing and grades. One day, Okumura hears a rumor from a friend that Karasawa suffers from erectile dysfunction. Seizing what he believes is a chance to humiliate his rival, Okumura confronts Karasawa and openly taunts him about the supposed condition. To Okumura’s shock, Karasawa’s usual composed and refreshing demeanor shifts dramatically. Instead of being embarrassed, Karasawa reveals that he has a deeply twisted secret fetish, and he is thrilled that Okumura knows about it and is provoking him. The confrontation triggers a complex and increasingly intense relationship between the two. Karasawa’s hidden sexual preferences become the central force driving their interactions, pulling Okumura into a psychological and physical power struggle. The narrative follows the push-and-pull between Okumura’s initial desire to dominate and Karasawa’s unexpected, overwhelming response. As the story progresses, the dynamic evolves beyond simple rivalry into a darker, erotically charged entanglement, exploring themes of control, submission, and hidden desires. The manga is set in a contemporary university environment, which serves as the backdrop for the characters’ everyday social lives and the secret, increasingly invasive games they play with each other. Notable arcs include the initial revelation of Karasawa’s fetish, Okumura’s failed attempts to regain the upper hand, and the gradual blurring of lines between resistance and compliance as both characters are drawn deeper into a relationship that neither fully anticipated.