Lin Hechuan, an ordinary young man, accidentally transmigrates into the world of Doraemon's Rules Horror. Waiting for him is Doraemon, whose eyes are hollow and smile twisted, a ruthless enforcer of the rules. Doraemon tosses him a yellowed handbook filled with strict rules: he must pretend to be Nobita's cousin and must never question his identity, or danger will follow. Faced with a bizarre school, strange gadgets, and unsettling companions, one careless move could condemn him to a fate worse than death. In this familiar yet terrifying world, Lin Yi must follow the rules to the letter while searching for the truth, struggling to survive in a horror story where every step is fraught with danger and looking for a way back to reality.
