Who transmigrates into the body of an unborn baby? Poisoned before birth, abandoned, then hunted down. She's just a good-for-nothing! They call someone who knocks every genius flat a good-for-nothing? Someone who casually wipes out a whole group? She has to be killed! Can they just let her grow up in peace? “Want revenge? I'll help you.” “Here, take this ancient magical zither.” The Demon King, who makes a living tormenting infants, wants her as his disciple and spoils her endlessly. This world has gone completely fantastical.