Don't Panic, I'll Look at the Rules First

Lu Chen, the secret room planner, traveled into an ancient mountain village that was full of weirdness. On the eighteenth day of every month, the whole village must "respect the well"; if the rules are wrong, the well will be sunk. He followed the rules carefully, but he was thrown down anyway. Falling into the darkness at the bottom of the well, he discovered the truth about the world.