Mateo Pierce is a student who attends the prestigious Breglin Military School in the Country of Breglin, which is constantly at war with its neighbor Velin.

One fateful day, the students of the Elite Class in the Breglin Military School were summoned to another world to defeat the Demon King. If they did so they were promised that all the magic and skills they gained from this world would travel over with them when they return to their world.

Witnessing the might of the Wizard and Knights of this world the group was easily enticed at the prospect of finally ending the war that plagued their country.

However, Mateo was not actually a citizen of Breglin but in truth a Velin Spy. Filled with the fear of what may happen to his home country should his classmates return, he knew he could not let his classmates succeed in killing the Demon King.

Watch as this Velin spy sabotages, assassinates, and betrays his classmates for the sake of his Country.