A cat—no, a handsome young duke!? The clumsy caretaker heroine is constantly being helped by an adorably cute cat. A mysterious and beautiful young duke is actually a winter cat. Charlotte, who comes from a poor noble family and even tears her only dress on the day of her debut at a social party, meets a cat in the castle garden... A cat that appeared as if to help her is actually Duke Christopher, who takes a liking to her and appoints her as the cat's caretaker. The cat is the favorite "cat duke" of the cat kingdom. Charlotte, who takes care of Christopher as a cat, gradually falls for him despite her misunderstandings, and accepts his passionate kisses. "If you close your eyes like that, I'll end up kissing you again."