At a school in the city, Kanna and Sumire are teachers. In the class they oversee, there was a student, Kaoru, who had been absent from school for over a year. Worried about him, they made a home visit, which set these events in motion. Kaoru was an extremely wicked man who abducted women from the streets, lured them into sexual acts, filmed them, and then sold the footage on dark websites. First, Sumire was set up, and then Kanna was attacked by his family's venomous fangs!! What began were days of unspeakably horrific sexual hell.