Riko and Rimu Mikogami are twin sisters who live in Kamihama, a
Japanese city abundant with natural wonders. On an otherwise peaceful
day, while searching for a run-away cat, the two come across a
mysterious Kirumin compact in an attic. With the Kirumin, these
character-costume-wearing girls can transform into real animals. Their
older sister Nagisa Mikogami soon joins them. Now the three have cute,
funny and sometimes dangerous adventures while solving a lot of
mysteries they encounter.
Kawamori's theme for the anime is: "What if you can really transform into an animal?"