Beast Mastery: Loser Princess

She was the haggard eldest miss of the Prime Minister's Estate. Her beauty was gorgeous, but she was a good-for-nothing. His death was greeted with a powerful soul. Beast taming, pill concocting, and male sex treatment were all very easy to deal with. 
He was the well-known retarded emperor of the West Yuan Kingdom. She was forced to marry him, but on her wedding night, she was almost eaten clean. It turned out that the wolf was pretending to be a sheep, because it had a black stomach. It had to be a pitiful appearance. She tried to resist, but she didn't know who would fall.