Mei Itsukai lives a comfortable married life with her kind and considerate husband, free from any worries. However, she has one major problem: living with her vulgar and tactless father-in-law. His constant sexual harassment makes her daily life unbearable. One day, while her husband is away, Mei falls asleep—and the father-in-law, seizing the opportunity, quietly shifts aside her underwear and forcefully penetrates her sensitive, sweat-and-woman-scented area with his thick cock, violently creampie-raping her. From that day on, Mei's young body is repeatedly violated by the man who takes every chance to assault her. How much pain and suffering can one woman endure?