With her husband away on a long business trip, Mariko lives alone with her son, Kazuya. Recently, Kazuya's friend Atsushi has begun to develop strong feelings for her. Starved for maternal affection and aroused by her single-mother lifestyle, Atsushi gradually develops an intense desire for Mariko. One day, he forcefully pins her down and passionately caresses her body. Overwhelmed by his fervent advances, Mariko experiences pleasure she hasn't felt in years. The youthful energy and powerful physique Atsushi possesses excite her deeply, and before long, she finds herself unable to forget him. Gradually, both her heart and body are consumed by Atsushi's burning passion.