The story centers around 16-year-old Alus Reigin, a young prodigy and the world's strongest Magicmaster in a battle against the invading fiends, while attempting to reclaim humanity's lost territory and to protect mankind from near extinction in fantasy-esque earth.

Initially, Izushiro started his work on the user-generated novel publishing website Shōsetsuka ni Narō back in 2015.

Hobby Japan eventually acquired Izushiro's work and began publishing the print edition as a light novel in February 2017.

A massive magical barrier was erected by Babel in the center of the seven nations, thwarting the fiends' invasion and saving humanity from extinction.

On top of his growing list of responsibilities and frequent messes in dealing with these beauties, he resumes his research and continues to defeat the Fiends in secret.