After returning home from the seventh anniversary of her husband's death, Eriko ends up inviting a young man from the neighborhood, Kazuya, over to her house, where she is seduced by the sensuality of the young man's firm body, which she has not touched in a long time... Even though she is faithful to her husband, her body cannot bear the throbbing, so Eriko masturbates in secret from Kazuya. She has no idea that Kazuya has noticed her actions... And when Kazuya pushes her down and accepts his cock, Eriko forgets her chastity with her husband and begins to spend her days indulging in lust with the young man...