Forcibly grafting a world of rules and ghost stories with criminal investigation reasoning. The rules are not naturally generated, but a "killing game" carefully designed by an unknown entity based on human fear. The unique advantage of the protagonist is not super force or infinite resurrection, but the use of crime-solving methodology (on-site investigation, logical reasoning, criminal psychological profiling) to reversely deduce the underlying logic of the rules, thereby finding gaps in "legal violations". There are conflicts and priorities between rules. The protagonist deconstructs the rules to kill the rule makers.
