IPZ-437 Sayuri Honjo gets raped in front of her husband

Yoko lives an ordinary but happy married life with her husband, whom she met at her previous workplace. Although the two were modest, they were eager to set up a new home and live in a new world. The two go to greet the residents upstairs. When the door opens and a strange smell appears, the person who peeks out is Kamata, a widower who ran away from his wife. A married couple's happy daily life is turned into a nightmare by the hands of one lonely, powerful demon.