Her husband's business trip was postponed for a few more days, so Ai felt extremely lonely. During this time, because Ai's sister was traveling, she sent Kazuo to stay at her house for three days. Being sexually deprived and having nowhere to deal with it, when he met Kazuo, Ai wanted to have sex with him. The boy is very studious, no matter how charming she is, Kazuo is still determined not to be swayed. At this step, Ai must use his final blow. When Kazuo was sleeping, she sneaked into his room in her underwear and used all of her sexual skills so that he couldn't refuse. Whoever succeeded, she put a sack on him and took away the virginity of her eager brother. But she didn't know that she had awakened the demon of love within Kazuo. He thrust his naked cock straight inside Ai and shot all of his semen into the depths of her. He kept making love to Ai over and over again, no matter how much Ai begged. And during Kazuo's three days here, the two of them were almost always attached to each other, and the inside of Ai was always filled with the dense stream of sperm that Kazuo had accumulated over the years...