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... - Sayuri, 36 years old, married for 12 years, no children, enrolled in an English conversation class. - A married woman relaxing alone at Takahashi's house is changing clothes when director Takahashi comes home. - The married woman is surprised and confused by the sudden event, but by the time the two of them go back to the room after eating out, they are happily chatting. - A married woman is surprised to learn that her friend's husband is an AV director and confesses that she is bisexual. - A married woman who doesn't have sex with her husband learns how to seduce men from the director. - The married woman who accepted the kiss and the director was mesmerized as her sensitive areas were played with. - She happily sucks the erect rod that she has never seen outside of her husband's and begs for it to be inserted. - A married woman moans when it hits her deep inside. - She is made to cum with a toy before going to bed, and the next morning she actively blames the director and moans loudly with someone else's dick.