DOFUS

A long time ago ...
... a dragon named Bolgrot arrived in the eternal Province of Amakna. The young Rykke Errel was the only one to be courageous enough to face the terrible creature.
Instead of reducing him to dust as it could easily have done it, the dragon bowed down before the young knight and swore loyalty to him.

Months have passed by and young Rykke met Helsephine, a young enchantress, and fell madly in love with her. When he introduced Helsephine to Bolgrot, Rykke would never have guessed what was about to happen.
The dragon, mad with rage, killed the sweet Helsephine and flew away, destroying everything on its way.
Knight Rykke chased the dragon. When he found it, the old friends confronted each other in a titanic fight. Using his weapons and his magic, Rykke succeeded to bring Bolgrot down. But fatally injured, the young hero died short after.