Hiromi appears on the outside to be a mature, resilient girl, but on the inside she feels like she's falling apart. She is having troubles at home...

Haruka finds a cat in an abandoned building and names it "Nyan". Little does she know that this cat is actually "Ultra-Nyan" who has come from outer...

Ultra-Nyan's adventures continue. This time, he is tasked with finding the cause of the crows' sudden declaration of war upon the cats.