The Black-bellied Second Young Miss

A modern police officer accidentally turned into the bullied second young miss of the Su Family. As the only White Dragon Family's martial artist that couldn't fly in the sky, this was the Su Family's shame! 
However, this good-for-nothing was an arrogant and playboy. He couldn't fight against his father, he couldn't fight against his family and family, but he could still play with the young masters and royal descendants of aristocratic families like they were monkeys! And he was the only sickly and weak genius prince in the dynasty. Some healing masters claimed that he wouldn't live past twenty years and would be reared outside of home since he was young, but he just happened to be thrown into disorder by this stubborn yet foolish and adorable young lady. Should he help her fly into the sky, or should he keep her firmly locked in his harem so that this little thing wouldn't cause trouble everywhere?!