Mr. and Mrs. Kasumi who live together with their brother-in-law in a two-family house left by their parents. However, the relationship between the brother-in-law and his wife is delicate, and her wife Keiko just ran out of the house this morning. Kaho, a sister-in-law who takes care of her brother-in-law, Shinji, without seeing it. Shinji, who was strongly attracted to her kindness, hugged her unintentionally. She desperately persuades Kaho, but she loses to the desperation of her brother-in-law who desperately asks for her, and inadvertently allows her body. Since then, her body of Kaho, who remembered the pleasure of being fucked by her, can not stop her sweet pain that echoes in her womb.
