Feminine Property Registration Bureau

In the past ten years, the "folklore retrospection phenomenon" has appeared around the world: old folk customs, taboo rules, and old cases that have been lost in various places will randomly solidify into rule fields (i. E. Copies). The realm must strictly follow the folk rules of the old era. Violating the rules will result in death. Complying with the rules can only save your life. Only by tracing the truth and settling unjust cases can you completely clear the realm and eliminate the weirdness. These strange things are not the work of ghosts, but human rules formed by obsessions - every terrifying taboo is a warning written by someone in the past with their lives.