Two female teachers, Kanna Himeno and Sumire Kurokawa, visited the den of iniquity. (APNS-137)

Kanna and Sumire are teachers at a school in Tokyo. One of their students, Kaoru, has been absent from school for over a year. This happened because she was worried about him and went to visit him at home. Kaoru is a heinous man who kidnaps women on the street, forces them to have sex, films them, and then sells the videos on underground websites. First, Sumire is defeated, then Kanna is attacked by his family's venomous fangs!! Then begins an extremely terrifying sexual hell.