Ken, who thought he would never have a relationship with a woman, suddenly finds himself in a rosy life. Her mother's best friend, Satsuki, came to visit her at her stay. Ken didn't expect her mother's best friend to be just an old woman anyway, but her heart can't stop pounding when she sees Satsuki, who is full of adult sex appeal. Ken, who can't help but feel horny, tries to use her freshly-undressed underwear as a side dish in anticipation of her bathing in Satsuki.
