A devoted husband's peaceful life collapses when new office worker Mizuki targets him. Her thick, sexy ass and whispered dirty talk melt his restraint, and he becomes addicted to letting her toy with him. He eventually falls so hard that he is prepared to leave his wife. Across four encounters, Mizuki tempts him with her ass on her first day, talks him into creampie sex while pressed against him, invades his home with more filthy teasing, and finally gets creampied in the married couple's own bed.