Haru is walking home after a dreary school day when she spies a cat with a small gift box in its mouth crossing a busy street, and she jumps in front of traffic to save the cat from an oncoming truck. To her amazement, the cat gets up, brushes itself off, and thanks her. But things take a turn when later that night, the King of Cats shows up at her doorstep in a feline motorcade. He showers Haru with gifts, and decrees that she shall marry the Prince and come live in the Kingdom of Cats!