Reborn in Another World: The Way of the Greatsword

After chasing a thief, he was beaten unconscious by a group of thugs. When he woke up, he found himself in another world, on a continent called “Ashes.” Somehow, he acquired all the equipment of the world's greatest greatsword wielder, along with the inexplicable ability to grow stronger the more demon beasts he eats. Thus begins his path as a greatsword warrior. This world is divided among three forces: humans, demons, and demonkin. He later discovers that although humans and demons can live in peace, demons are never treated as equals. Enraged, the protagonist joins the demons to find a way to break their contract and fight back against humanity's tyranny.