Tatsuro, who had to live with his aunt Hisayo for some reason, was worried that she was too free for sex. Show off your chest and crotch without trying to hide your underwear, pant voice every night and indulge in masturbation. In those days, Tatsuro was in agony without hiding his confusion. And one night, Hisayo suddenly came in while Tatsuro was taking a bath. Aside from the surprised Tatsuro, Hisayo, who is naked, leads to the climax while playing with Tatsuro's cock that has just erected.