Warlock Dragoons

After a chance accident ended his life, a teenage boy contracts himself with an enigmatic demon and wakes up in the body of Sir Garos Malling. A minor Human noble in another world ruled by the Dragon race, that is about to change rapidly, going from medieval Dragon Kings, human knights, and pre-modern technology to a mixture of the advanced magics of Elves and technological prowess particularly in the form of harnesses; mechanized humanoid weapons used by warlocks to dominate the battlefield and the skies above them.