After losing his job, Matsuoka Natsumi's brother-in-law Shin moves into the Matsuoka household and begins to disrupt her daily life. He leaves messes in her room, smokes cigarettes, drinks heavily, and constantly spews abusive language, making Natsumi increasingly uncomfortable. When she asks her husband to kick Shin out, he shows no concern. A few days later, Natsumi catches Shin stealing her living expenses while her husband is away, pushing her to her breaking point. She finally snaps and pleads, "Just leave already!" Enraged by her words, Shin pins her down and violently rapes her, forcing her to climax repeatedly with his filthy body until she's left utterly broken.