Maki and her husband were worried because her husband's thing was no longer useful. One day, Maki happened to see a TV program in which a man named Saeyama, who called himself an "anal expert," said that "anal sex can bring back the passionate time for couples," and Maki accepted her husband's penis into her anus... In contrast to Maki, who was obsessed with the new sensation, her husband began to avoid his wife. "I want to have my ass violated!" One day, when that desire reached its peak, Maki met Saeyama by chance...