"Ahh, I want to have sex!" Keita, who doesn't have a girlfriend, spends his days in frustration, wasting away just making and releasing sperm. He's at his limit. Just when he thinks his mind is going to go haywire, he sees his mother, Kaori, cleaning the house. "Mom's breasts are just like in an erotic manga..." Her swaying cleavage is just like the scene he saw in the erotic manga he's been wanking off to recently. Keita, who is so frustrated that the line between reality and fantasy is blurred, realizes that he should just have sex with his mother like in the erotic manga.