In a city, there is a place called “Hole”, a district that is old, old and irregular. There, the principle of their life is that the strong will prey on the weak. So, a death is considered normal by those who live there.
This district does not even know the name of the law and rules. This place is most favored by magicians to conduct experiments. The witches consider themselves to be the best and see the residents of the Hole as a flock of insects.
They can kill, mutilate, or become a test object for magicians. Unfortunately, one day there was a man named Kaiman who lost his memory due to the act of a witch. To restore this, Kaiman hunted the magicians with the help of Nikaidou.