The Rules and Monsters Investigation Bureau is an organization composed of numerous agents who specialize in solving Rules and Monsters, as well as researchers who produce the monsters and props needed by the agents.
Among them, an agent code-named Rain from the Tokyo Branch of Japan received a commission from the Shiratori family...
Unexpectedly, this commission officially started the battle between rain and the world of ghost stories.
Copy 1: White Bird Heir Rules (Updated)
Main cp: Shiratori Makoto xRain
