Are your daily business activities and personal life affected by the supernatural? Fret not for a company in Tokyo called "超自然 - Choushizen Agency" specializes in warding off the paranormal away with the help of their employees called Agents. Yet it is not without a fee, of course! Business is still business and a regular annual payment they call "Supernatural Insurance" is still required to be paid by the client! But, if you're from the worst District of all, things may not really go according to how it seems. After witnessing a supernatural flesh eater on the loose, Miho gets saved by two agents. But her meeting with them is but a start of something that she, for the life of her, did not expect.