Nana Miho is a cheerful adult woman who loves sex, but this extreme session keeps making her cum until she can no longer smile and her entire body seems to malfunction. A barrage of toys and nonstop follow-up pounding overwhelms her nerves, causing uncontrollable urination and torrents of fluid. Then pleasure beyond anything she has experienced makes her arch and leap into the air with every orgasm. Terrified that another climax might break her back, she still endures the relentless sex the production wants to see.