The Demon King has fallen, but before the light came back he split off a piece of himself as a successor: Valaris III. Charged with winning the age of darkness back, Valaris leaves the demon castle for the human world and surfaces somewhere no dark lord planned for, second-year Class B of a Japanese school. Blending in with ordinary students while plotting a route back to power turns out to be harder than any battlefield. A gag fantasy from Gintama creator Hideaki Sorachi.