It had potential?
The art is respectable, I just felt it wasn't exactly fitting.
The story was weak. It seemed to throw a bunch of character ideas and tropes (a princess who ‘can't' escape, a king mad(?) with power, a doctor with questionable virtues, etc), but not actual characters. The time era wasn't recognizable and towards the end incongruent things happen (a magical/supernatural force comes out, but is ineffective, he comes to nothing; shift in violence, poison is very different from decapitating someone; etc.)
There isn't any development. I didn't understand the relationship between the king and princess (his daughter) and it's never stated that the princess can't leave, only her fiancé is asked explicitly to stay.
Also an odd side story of a man being asked to stop smoking a pipe by his wife(?).