On the fourteenth century earth, the world is plagued by war. The nobles of various kingdoms were fighting internally for power. But there are differences on this earth from our own, not only the kingdoms name and culture but also another thing. Mages. Nobility has studied the arcana for centuries, and now mages became the most sought profession among the war-monger nobles. But not only that, people now have a small chance of improving their lives, and that took many men to a mercenary life. Killing a king to become a noble. Whenever a mercenary killed a king personally, they would be awarded a noble title of knight, instantly going upwards in life. But to kill a king, you have to pass through his army, his personal guards, and magicians and only then kill the king that is also a master of the arcane arts. Ezel, a common peasant, lived a starving life until he met a man that would change his life forever... Ezel is the greatest magic swordsman that ever existed. The King Slayer! (Warning! This novel contains a homosexual protagonist!)