Koichi takes care of his sister, who has recently returned from a trip abroad in the United States as she is not well. While caring for her, he records evidence of ghosts in their home.
A disgruntled researcher injects his former employers' meal with a serum that turns their sushi into flesh-eating monsters.
Mikoto was once a warrior God who rebelled against the Lord of Hell. He banished Mikoto, inserting her soul into the body of a high school student, condemning her to live among humans exterminating demons.
