Nuku Nuku is a cat-android hybrid who was created to protect the peace and thwart the evil schemes of the Mishima Corporation. She lives with her creator's family and masquerades as an ordinary human school girl; however her feline instincts and android strength threaten to reveal her true identity. Nevertheless, she often finds herself forced to use her super-human abilities to protect humanity, usually from the company's malfunctioning products, but will her secret be discovered in the process?