Ai Mukai, married to a coworker, harbors intense disgust toward Nakata, a client who repeatedly subjects her to sexual harassment. Nakata, her husband's senior from college, exploits their past hierarchy to force his way into their lives. He manipulates her husband—intolerant to alcohol—during drinking parties, deepening his psychological distress. Witnessing her husband's suffering and unable to stay silent, Ai directly confronts Nakata, expressing her outrage. Enraged by her defiance, Nakata immediately assaults her. Overpowered and pinned down by his large frame, Ai is violently penetrated and driven to an intense, uncontrollable climax.