Baron, Neko no Danshaku

A schoolgirl named Haru saves a cat while returning home from school, only to be unexpectedly welcomed by a feline royal family. She is quickly pulled into a world where cats speak and live among them. Haru is chosen to become the next Cat Princess. To help her return to her normal life, she is aided by Baron, a well-dressed cat, along with a magical crow, a humorous overweight cat, and a friend from her past.