Masahiro, a father-in-law who decided to live with his son and his wife. Masahiro, who has been attracted to Ayumi, his pretty and gentle wife, can't stand it and commits Ayumi! ! ! Ayumi can't resist her father-in-law's obsessive approach and is forced to do all kinds of obscene acts even if her husband is by her side. At some point, Ayumi drowns in the unfathomable sex of her late-blooming father-in-law.