Imaoka and Yokoyama, studying for their administrative scrivener license, are being tutored by Ayumi, their friend's wife. However, overwhelmed by Ayumi's unique scent and erotic pheromones, Imaoka reaches his breaking point and pleads with her, "If we can't have sex, at least let me have your mouth!" Ayumi agrees to suck him off, making a secret promise. Yokoyama soon finds out about the incident and can't concentrate on studying. Sensing their arousal, Ayumi begins giving them both an intensely seductive lesson, drawing the two men even deeper into her spell.