Cartagra: Tsuki Gurui no Yamai

The hero of this story is Takashiro Shugo.

An ex-police officer that is now unemployed and freeloading at a brothel.

From time to time he takes on detective work from his former superior.

As the story starts off, a missing persons case is dumped onto him.

The person he is supposed to find is Kohzuki Yura.

A girl he had an intimate relationship with before being sent off to war.

While all this is being played out, a series of brutal killings occur in the background.

As they strike closer to home, Shugo is no longer able to turn a blind eye and is dragged into the spiraling web of events.