The Last Dragon Slayer and the Dragon

In this era, dragons have become legendary creatures. And the dragon slayers who made a living by slaying dragons also died with the disappearance of the dragon. The last dragon slayer, Eugene Rodney, only wanted to get rich and reach the top of his life. And just when his life was difficult and he was unable to do anything. The last dragon in the world appeared in front of him. Or... A giant dragon that turned into a girl appeared in front of him.