At the height of his happiness, with his wedding just around the corner, a man steps into the depths of forbidden love. The setting is a steamy mixed-gender hot spring. The voluptuous, mature body of Ozawa Naho, his fiance's mother, is revealed in the moist heat. Though mother and daughter share a resemblance, the allure of this mature woman is irresistible. The heat of the hot spring melts reason, and an immoral kiss is exchanged. Her ripe, exquisite vagina welcomes the man, shattering the wall of being a stepmother with pleasure. Spiced up by the guilt of betraying his daughter, the seed of life is poured deep into her womb, a record of a cruel and lascivious impregnation.