Master Detective Archive: Ultimate Rain Code

Yuma Kokohead, an amnesiac detective, sent to Kanai Ward by the WDO to unravel Kanai Wards Ultimate Secret. He supposedly meets 4 surviving Master Detectives, but what if it wasn't 4 Master Detectives, but even more?

Or Some characters from the Danganronpa games are master detectives and become part of the story.