His sister-in-law, Renka, makes fun of her virgin brother-in-law. The virgin boy gets mad at Renka, who teases him by showing his blatant panties and breasts, saying, "This is what virgins are like," and gets his revenge! He attacks her, rapes her, and when she runs away, he chases her and rapes her again! The brother-in-law keeps on chasing her until she's satisfied, and the sister-in-law finally loses her sense of reason... and attacks her brother-in-law, fucking him and climaxing! The sister-in-law, who has become a climax-junkie female beast, has a broken orgasm that doesn't stop even when the dick goes limp!