Haruka has a secret that she cannot tell her husband. Due to the stress of being sexless with my work-oriented husband, I had a physical relationship with my brother-in-law. For Haruka, who had intended to do it only once, his brother-in-law came to the house and devoured Haruka's body while waiting for her husband's absence. Haruka refused at first, but the pleasure became a habit as the number of times increased.