The protagonist, Tomokazu Mihara, lives with his beloved wife, Maho and his father at home. The couple started living with their father about a year ago when Tomokazu's mother died of a sudden illness. The shock of his wife's death made him lose his will to live and quit his job. Thanks to his wife's devotion and support, he has healed from his emotional trauma and is now in good health.

However, as he regains his energy, his father who always had a high sex drive, begins to have ill feelings toward his beautiful young son's wife. Tomokazu, who never dreamed that his father was harboring inferior feelings for his own wife, begins a long-desired pregnancy drive with Maho.

However, after three or six months, they are still unable to conceive a child. It might be my fault that I can't have a baby... Tomokazu gently comforts Maho, telling her that there is no need to be in such a hurry.

One day, after seeing her husband off to work, her father-in-law comes to Maho, who is sighing and worrying about her fertility. After eliciting Maho's concerns with words, her father-in-law pushes her down, saying he will help her with her fertility. Maho tries to resist, but her father-in-law's expert sexual skills make her feel it and in the end she allows him to penetrate her.

After that, the father-in-law steals his son's eyes and demands Maho's young body at every opportunity. Maho is afraid that her husband will find out about her relationship with her father-in-law, but she is unable to refuse him and is embraced by him again and again. Maho is embraced by her father-in-law many times, while she is taking a bath, while she is talking to her husband on the phone, and even right next to him while he is sleeping... Even though she knows it is wrong, Maho is gradually drowning in sex with her father-in-law, who is far more intense and energetic than her husband.