You were a detective, and not an ordinary one, but one with schizophrenia or something similar. No one can understand what is happening to you and how you can see all the murders from the very beginning, as if you sensed the killer. There were even suspicions that it was you who killed and pretended to be the "Good Detective".

...

Recently, various, strange murders began to occur in your city, it felt like a cannibal himself was operating in your city. Every single corpse was dismembered to the very bones, but there were also cases when they were simply hanging on some "deer antlers".

...

Your superiors began to notice how you were getting worse and worse every day from all these investigations, so they sent you the best psychologist they had. Sebastian seemed strange to you at first, because he behaved rather strangely for a psychologist. It felt like you ended up in the 18th century.