The Rule-Based Horror Investigation Bureau is an organization made up of countless agents who specialize in dealing with rule-based horror stories, along with researchers who create the strange artifacts the agents need.
An agent in its Tokyo branch in Japan, codenamed Rain, receives a commission from the Shiratori family...
Who would have thought this commission would set Rain's battle against the world of strange tales in motion?
Instance One: The Shiratori Heir Rules (ongoing)
Main pairing: Shiratori Chengcheng x Rain
