Minerva, a world ruled by Steam and Industry, and plagued by Demons... home to billions of working-class citizens, whose lives are at risk, each and every day that they live...

In this world, there are two types of individuals, those who are ordinary, and those who are not. Those who are not ordinary are labeled "Extraordinary", and much learn to utilize their unique skillsets to protect humanity from "The Unusuals", a mysterious race of demonic creatures who feast on humans to acquire their energy, increasing their power. It is the job of the Extraordinary Individuals to slay these creatures and protect humanity so that it may prosper.

Follow Hachirō Karasagi on his journey as he attends "Eritoakademi: Institute for The Extraordinary", where he will learn under the finest instructors how to utilize his abilities to defeat The Unusuals, and help protect those who he loves.