Without knowing how, Saya found herself surrounded by zombies. Instead of eating her alive, they tore her clothes off and molested her, before raping all her holes. Once they were finished, she felt sick. And cold. Slowly, she was turning into one of those disgusting undeads.
And then she woke up. It was all a nightmare. Though nothing was real, she still remember how she thought she felt while getting gangraped by zombies. And her crotch was very, very wet. She had no choice but to calm herself down by masturbating, ending up cumming at the thought of being raped by monsters.