The Dog of Hell is about to be...leashed. Nora, an unruly demon, has defied his superiors one too many times. For the sake of his education, Nora is sent to live among mortals and enters a bond of servitude with cool-as-ice star student Kazuma Magari. Kazuma is about to learn the ways of the underworld...and Nora will learn more from the real world than he ever thought possible! Nora and Kazuma head to a location where the Resistance is collecting Soul Stones...but then the seal spell on Nora is broken! With Kazuma's commands no longer having any effect, will Nora go on a mad rampage as Cerberus? Or can Kazuma find another power source before it's too late?