Demon King Xeos
A long time ago in a distant world much like our own but constantly at a state of war. There was a clan of warriors who took charged of the battlefield and was never afraid of a fight even if the numbers were stacked against each other. They were fearless and courageous and didn't know the meaning of the word retreat. They were feared all across the land for producing strong, and talented warriors who conquered every battle they fought in not matter the losses. Though unfortunately their success was also what brought them their downfall. Multiple countries joined forces to annihilate this rouge clan of warriors who sided with no one and merely fought for the thrill and honor of it all. Though they were ruthless, they were not monsters. Though they look down upon cowards, they will never strike down a defenseless enemy since it didn't sit right with them.
The clan of warriors were called by their first leaders last name The Yoshimori Clan. The Yoshimori's were fiercely loyal to their own and only to their own. When a specific group of the clan requested backup for a particular battle, The rest of the Yoshimori clan responded and went to aid their comrades not knowing it would be their last.
This is a story about a young man who was a slave turned soldier and how he came to be known as the Demon King.