Meet Yomii. A cat that roams the streets of Tokyo. A very modern place as you might say, they have many robotic things, one of them being their beloved animal: The cat. Created as a pet for people who have allergies, or can't take care of a real animal, the iCat was created. Though it was a very successful in business, it began to go downhill, as the iCats malfunctioned, causing explosions and power outages. The iCat had then disappeared from the city of Tokyo, never to be seen again. As Yomii spends her days on the streets, she bumps into something in an alley. A thrown away iCat that hadn't been disposed like the others. Fully working, the iCat gives Yomii a brief "hello" and tells her his name is Kaicho. Becoming close friends in a matter of time, Yomii has no idea what she's walked into.