In a certain town's 3rd District, missing pet posters are frequently put up. The poster reads, "Have you seen my Maru?" accompanied by a picture of a cat with a curly tail. The boy looking at that poster happens to have fluffy ears and a curly tail...!? The cats and dogs of the 3rd District are running around in human forms!? Won't you come take a look at the soft, adorable, and colorful daily life of Maru and his friends?