At a young age, Isagi Yoichi’s entire village got destroyed by demons. He had watched as the villagers he once had been so close with got slaughtered. Ever since then, he had decided to fight demons, to make sure no one else would have to go through that pain as well…

Isagi now stands surrounded by the rubble of another destroyed village… He is severely injured, and his stamina is low at this point… Suddenly, something hard hits him in the head, and he blacks out…

When Isagi wakes up, he’s chained up to the ceiling in the Demon king’s castle… As he looks up, he finds himself staring straight into the eyes of Michael Kaiser… The Demon king…