Monami, who became a widow soon after remarrying, lives with her stepson. Despite knowing it's wrong, they can't help but develop feelings for each other as if they were strangers. One day, they go on a hot spring trip to celebrate her stepson's new job. Suddenly, her stepson confesses his love for her. Though she knows it's taboo, Monami can't resist the loneliness of being without her husband and the allure of his familiar manhood. She finds herself succumbing to his touch, her breasts being squeezed and licked, experiencing multiple orgasms. Enjoy this forbidden incestuous hot spring trip where they passionately seek each other out.