Tsubasa lives a comfortable life with her kind and caring husband, but she has one major problem: cohabiting with her tactless and insensitive father-in-law. He constantly subjects her to emotional and sexual harassment, making her daily life miserable. One day, while her husband is away, she falls asleep—and the father-in-law discovers her. Taking advantage of his son's absence, he shifts her underwear aside, greedily devours her sex soaked with sweat and feminine scent, and forcefully rapes her, climaxing with a creampie. From then on, Tsubasa is repeatedly assaulted by her father-in-law, her young body defiled night after night.