Yumi, a mother who witnessed her daughter and her boyfriend Daisuke doing naughty things at home, gets excited and approaches Daisuke the next day! Daisuke is drawn in by her adult charm, embrace, and naughty technique that she does not have... Since they started their naughty relationship, Daisuke comes to the house under the pretext of coming to see her, and indulges in an affair with Yumi...