Her husband is on a long-term business trip, and Mariko lives with her son, Kazuya. - She is attached to her son's friend, Atsushi, who was recently made. Atsushi, a single-mother family who is hungry for her mother's love, hits her with a desire that goes beyond affection and forcibly pushes her down. Mariko unknowingly enjoys the pleasure she hasn't tasted for a long time in his caress, which she repeatedly plays with her body as if she were greedy.