The 13th, a day of abstinence: A terrifying "overtime" show featuring a perverted boss's 13 ejaculations. (Mitsuba Chiharu, DLDSS-524)

Chiharu, who had abstained from sex for 13 days to have a child with her husband, is on Friday, her long-awaited ovulation day. The abstinence has been remarkably effective; her libido is high, and her sensitivity is exceptional—perfect timing for trying to conceive. However, she is unexpectedly asked to work overtime by her department head, Daiki. While working in the empty office, a man wearing a terrifying mask suddenly approaches… No matter how she tries to escape, the masked man relentlessly pursues her, repeatedly ejaculating inside her. By the time she realizes what's happening, she has already been ejaculated into a total of 13 times, and Chiharu's sanity begins to crumble…