In the Netherworld school known as the Evil Academy, students learn to be proper demons! Truancy, poor hygiene, and unfinished homework are what's needed to make the honor role at this evil alma mater. But, there is one diminutive demon not content with being the most sinful kid in school. The mischievous Mao has his sights set on superseding his own father, and becoming the new overlord of the Netherworld!