In a corner of the city, a white cat innocently plays with a high school girl named Oonishi. However, Oonishi is framed for shoplifting and is about to be sold off by the yakuza pulling the strings in the shadows. Learning the truth, the cat burns with quiet rage and brings pure white judgment down upon the darkness that threatens Oonishi…! "What… the hell… are you?" The name of that cat is Iris.