Koichi Takahashi, an AV director who calls himself the ``lover of a married woman's heart,'' lets his wife's female friend stay at his house with ulterior motives. - There's no reason why a married woman who spends the night alone with her has nothing to do with her... - Chika is 36 years old, married for 6 years, has no children, and works at a bedding store. - She was a married woman who had rented Takahashi's villa in Tokyo from her wife for a night and was relaxing there, when Director Takahashi unexpectedly returned home. - The married woman, who was entertained with alcohol and home-cooked food, relieved her tension and expressed her dissatisfaction with her husband's life as a couple, including his premature ejaculation. - Despite being persuaded by the director, he accepts the kiss and forgives his body, blaming it on being drunk. - She screams out loud and faints in agony when he repeatedly calls out how good it feels and is penetrated by the penis. - She releases her frustration by screaming in agony during sex after the fact and sex the next morning.