The Northsphere Magic Academy trains future mages destined for royal courts, the army and other important places. The academy has many departments where students learn all kinds of dazzling offensive magic, such as Combat magic, Summoning Magic, Spirit Magic, Curse Magic, Psychic Magic. And then... there's the Errand Department.

This school life fantasy follows Kenny, Souko and Rion of the Errand Department, the so-called "department no one needs". Deep within an extremely dangerous dungeon, these three friends cut down swarms of monsters quickly with ease! Sharpening their weapons with knife-sharpening magic, slicing enemies with storage magic... wait?! Is Lifestyle Magic actually the most powerful of them all?!