Ichika is very good at her job but extremely sloppy at home. She usually doesn't wear pants, only underwear, making her teenage brother unable to take his eyes off his beautiful buttocks. Knowing that his cute younger brother was still a new man, and he was extremely hungry for his ass, Ichika immediately wanted to help him get out of the new boyhood. So Ichika repeatedly seduced her brother with her ass, and the younger brother quickly surrendered to her beauty. And so, his new boy's life was officially robbed by his beautiful sister. After that, both sisters "played" with each other every day. They both promised, even if he had a girlfriend, he would continue to be "close" to Ichika as he is now...