Unable to find a job, the irritated brother-in-law, Mikihito, is scorched by the summer sun. He directs his frustration towards his cohabiting sister-in-law, Sayuki, and in the absence of family, he rapes her by force. Sweaty sex driven by lust. Although Sayuki resists, she succumbs to Mikihito's relentless desire, eventually being penetrated repeatedly, drenched in sweat, and reaching climax multiple times.
