High-schooler Ryoma Mikoshiba finds himself summoned to another world by the warmongering O’ltormea Empire. Finding himself in a world that fits his talent and skills in martial arts to a bloody T, Ryoma sets down a path of domination and war.

Ryoma, an ordinary high-schooler adept at martial arts, one day finds himself summoned to another world. Slaying his vile captors, he is on the run when he encounters two girls who will change both his fate and the fate of the continent.