“Too soft, Princess Cler.” Roht, a genius mage who wields the world’s strongest defensive magic, is the devoted butler and guardian of the world’s cutest and airheaded princess, Cler. Daily, he takes care of her, cherishing her adorable reactions while dealing with her affectionate but sharp tongue. One day, they receive a request to protect the national treasure, the “Magic Key.” As they embark on resolving this matter, it gradually leads them into a major event that shakes the fate of the country and their own destinies.”My butler will definitely protect me, right? “The tale of the strongest and cutest princess, Cler, and her poison-tongued but all-purpose devoted butler, Roht, begins!