Kasumi and her husband live with their in-laws in a two-generation house left by their parents. However, the relationship between Kasumi's brother-in-law and his wife is strained, and this morning, his wife Keiko had run away from home. Unable to bear it any longer, Kasumi's sister-in-law Kaoru starts taking care of her brother-in-law Shinji. Drawn to her kindness, Shinji impulsively embraces her… Kaoru desperately tries to reason with him, but she succumbs to the intensity of his relentless advances and eventually gives in. Since then, Kaoru's body cannot stop the sweet throbbing in her womb as she recalls the pleasure of being ravished…
