One hundred years ago, a gate opened, unleashing hordes of monstrous creatures that threatened to destroy humanity. Brave and strong warriors emerged from the mountains, facing off against these nightmarish beasts. After the devastating battle, gates continued to appear daily, and the warriors helped usher in a new age of civilization. Humanity has been defending the world ever since, but now the incarnation of the Demon King is about to change the balance of power forever. Nam chea-hyun was walking in the school hallway with his hands in his pockets and feeling bored