In some year called Blah Blah Blah, a world war broke out, and humanity's technology was all but destroyed in the fighting. Under the effects of nuclear contamination, some creatures began to mutate.
They grew bloodthirsty and started attacking humans of their own accord.
Xiu Mao is a little cat who likes to pretend to be human. It emerges from the ruins and slowly explores this world, both strange and familiar.
At first, Xiu Mao only wants to fill its belly, but the mutated creatures all want to hurt it. So Xiu Mao extends its claws and imitates humans by using weapons.
