Yumiko and Taka have been married for five years. Her husband is always away on business trips, even during major holidays like Obon or New Year, so Yumiko often feels lonely. She thinks that maybe her husband is bored with her or no longer interested in sex. One day, she accidentally finds a large amount of pornographic books hidden in the bedroom, and she discovers another side of her husband. The books are all about a wife who longs to be raped violently. She seems to be absorbed in imagining how good it would be if she could be raped too. While she is in the clouds, the doorbell brings her back to earth. In her hurry to open the door, she forgets to put on her underwear and cover her lower body. The person outside is Kazuya, a naughty young man from the next door. While Yumiko bends down to pick up the paper Kazuya dropped, she accidentally exposes her entire butt, still soaked with vaginal fluid, to Kazuya. And Kazuya knows exactly what is going on. He immediately attacked and raped her, which unintentionally triggered the desire deep inside her. The more she was trampled, the hornier she felt. And from then on, in front of her husband she was still a good wife, but in front of Kazuya she revealed her true face, a dirty whore who craved cock.