P●A president Yuki Chitose has a strong libido and a wild nighttime routine, which makes her step-son Satoshi dislike her. When the student council members find out about the situation in the Yuki household, they plot to punish her! Knowing her weakness, they blackmail her and use their evil dicks to fuck her plump, busty body with her big ass! Their demands escalate, and Satoshi, her step-son, joins in, demanding sexual relief. After being creampied many times and losing her reason, Yuki falls into their sexual slavery, both in body and mind...