Suzume is a diligent worker, highly trusted at the company, and happily married with a stable home life. However, her trusted subordinate, Sato, develops twisted feelings for her. One night, he slips an aphrodisiac into her coffee while they're working late. Overcome by intense, uncontrollable arousal, she ends up being taken advantage of and penetrated. From that night on, she begins lying to her husband, continuing to stay late with Sato. Gradually, she becomes addicted to the drugged sex, sinking deeper into this illicit world.