A pure love story about a childish old man who falls in love with Saki, who works part-time at a late-night convenience store. Naturally, this creepy old man with zero social experience is disliked, and in a fit of rage, he rapes Saki... But it doesn't end there, he imprisons her in her childhood room at her parents' house. She is raped every day by this childish old man with zero dating experience, who is completely open about his desires. The man continues to have rough sex with her, which inevitably gives her a depressed erection, but Saki finds pleasure in the rough sex. Can she escape from this situation?