Weird Story About Rules: I Rely on Clearing Levels to Survive

In this world, a terminally ill person accidentally binds rules and ghost stories and enters a different world. Everyone has to survive in the terrifying dungeon. Some are swallowed up by fear in the dungeon, some lose themselves under the strange rules, and some are desperate in the endless cycle. However, she was clearly suffering from cancer, but she relied on her talent to start a counterattack in the first copy of "Sister's Doll", but this was just the beginning...