The younger brother made a very wrong decision when he and his beautiful young wife Yokoyama lived with his unmarried older brother, which was like giving his own money to someone else's mouth. Indeed, the older brother had been alone for a long time so it was natural for him to crave sex, but the agent that caused him to cause that craving was his younger brother's wife. She is truly a lustful woman, having not yet had enough of her younger sister, she is now soliciting sex from her older brother. But she is also very wise when she constantly does sexy and arousing actions, typically intentionally wearing pants with holes in her private area when practicing yoga when her brother is present to make him unable to stand it. I couldn't take it anymore and had to force her to have sex. After that time, they had feelings for each other, a very obscure but also very deep feeling, so much so that when the wife was giving her husband a blowjob, the brother was secretly behind her.