After dating for a year, Hiroshi visits his girlfriend's home and instantly falls for her mother's stunning looks and beautiful body. That night, he stays over as a guest and while borrowing the bath, he's washed by her mother—her hands gently cleaning his crotch, sending waves of warmth and tingling arousal through him, clouding his judgment. As the night deepens, unable to sleep, Hiroshi wanders the house and catches sight of his girlfriend's mother sleeping peacefully in her room, her soft, alluring figure impossible to ignore. Overcome with uncontrollable excitement, the young man loses himself completely and reaches out toward her sleeping form…!