Undefeated Bahamut Chronicle
最弱無敗の神装機竜 (original)
From the broken, charred pieces of the Arcadia Empire, a new kingdom arose. To protect itself from future foes, the new Kingdom of Atismata began training Drag-Knights to wield ancient mechanical dragons known as Drag-Rides. When Lux Arcadia, former prince of the ruined Empire, sights the new kingdom’s princess, Lisesharte Atismata, naked, she challenges him to a Drag-Ride duel, beginning an odd chain reaction that will expose the dark secrets of both royal families.
Starring Mutsumi Tamura, Yukiyo Fujii, Lynn
Watch "Undefeated Bahamut Chronicle" on Hulu Plus released in 2016. It's a animation and action & adventure show, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of show.