Karin enjoys a comfortable marriage with her gentle, good-natured husband, but she cannot stand living with his vulgar, insensitive father and enduring his constant sexual harassment. One day, while her husband is away, the father-in-law finds Karin asleep. Taking advantage of his son's absence, he slips aside her underwear, devours her sweaty pussy, then brutally rapes and creampies her. After that, he keeps waiting for openings to assault and violate her young adult body...