During summer vacation, a son returns home after a long absence and is stunned to find his mother, Akemi, still as beautiful as ever. Her graceful curves, the elegant lines of her body, and her refined, dignified presence deeply stir his emotions, driving him to masturbate in private while fantasizing about her. Meanwhile, a young man from the neighboring house has begun setting his sights on Akemi, quietly making his move without her realizing his intentions.