Wataru was 6 years old when his actual parents were killed. They were eaten by his adoptive parents. Beings who pretend to be humans but are actually insects. Or at least have insect like qualities. To make it easier for him they blindfold his head, so he can only hear there voice. As there actual appearance is terrifying. And that his actual parents were wizards. Who made a deal with Lord Emma of hell. That there son will take over his job so that Emma can take a vacation. In exchange the family would be granted eternal salvation. Wataru knew this when his ancestor shows up, a paper doll like being with a sadistic sense of humor. Who told him that he must become a wizard if he wishes to escape the paranormal. The ancestor tells him that he will however stumble upon to other beings in particular. A being who is the descendent of the monster Wasis, and a ghost who is tied to a giant stone flask outside the wizard school. Eventually Wataru was noticed by the government who took him to a school for special beings like him. In this case the wizard school. As his ancestor said.