Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
In the distant future, humans and robots with their own selves lived together in cities, and there was a continuing paradox and strange relationship in which they excluded each other and depended on each other at times. The main character, a former police officer who quit his job and became a private detective, investigates a case of disappearance with his partner, the black cat William.
In the course of the investigation, he discovered that a killer who had been missing for a long time had reappeared, which brought back memories of his suppression. The long-running killer finally came to life. Does the main character find the truth behind the phantom, or is he swallowed by a conspiracy? When the truth is revealed, there may be a bigger mystery.