The Oda family is thrilled with the arrival of their long-awaited first grandchild, as their beloved daughter takes a husband. The son-in-law struggles to support his wife, who is struggling with childcare, while also striving to make a life for himself. The mother, Shiori, watches the couple with a smile, as they are just an ordinary, happy family... One night, the son-in-law sits in the living room with a depressed expression. As Shiori passes by and asks what's wrong, he hesitantly explains that his wife, who is busy with childcare, has been refusing their nighttime activities, and he can no longer endure it. Seeing her usually cheerful son-in-law so depressed, Shiori feels a pang of sympathy and, while her daughter apologizes, she comforts him by stroking his crotch. From that day on, Shiori tried to avoid the lewd gaze that the son-in-law sent her way, but eventually, she was raped and ended up accepting him. Shiori also reached orgasm several times during their long-awaited sexual encounter.