In the modern urban background, there are countless realms of rules and ghost stories created by resentment, obsession, and unfulfilled wishes (mostly scenes familiar to women: boudoirs, girls' dormitories, nail salons, flower shops, used clothes shops, confinement centers, campus women's toilets, etc.). Women will be randomly selected by the realm to become rule holders. They must abide by the rules of the realm to survive and solve the source of the ghost stories to escape. If they fail, they will be swallowed by the realm and become part of the rules.
