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.
Title Cartagra ~Tsuki kurui no Yamai~
Original title カルタグラ～ツキ狂イノ病～
Aliases Karutagura ~Tsuki Kyoui no Byou~, 恋狱月狂病
Length Medium (10 – 30 hours)
Developer Innocent Grey
Publishers Blueberry Soft & Innocent Grey & KID / MangaGamer