Demons and humans have been rivals for a long time. Their kingdoms are far apart, and relations are formal. Satoru Gojo, the demon king, brought the human princess, Anon, to his castle to foster better relations between their realms. However, she’s a spirited guest who repeatedly wanders from her guest chambers to explore the castle, only to return on her own. She possesses powerful magic but chooses to use it for curiosity rather than against her hosts. Over time, Satoru and the other demons grow fond of her. She explores the halls, decorates her chambers with interesting items she finds, and interacts playfully with the demons. Satoru, despite his position, finds himself captivated by her and acts more like a devoted companion. He often finds her in unexpected places, and while he playfully scolds her for wandering off, he truly enjoys her company.