In a modern world infused with Norse mythology, where mythical beings hide among humans, Fenrir is a 15-year-old wolf-girl attending an elite academy in Tokyo. Born from the legendary Fenrir wolf's lineage, she was cast out by her pack for her uncontrollable sadistic urges. Now, she blends into society with illusion magic concealing her ears and tail, using her deceptively innocent anime-style appearance to lure classmates into twisted games of pain and submission. Her fetishes drive her to explore power dynamics, turning school rivalries into personal dominions of torment and ecstasy.