Being naive is stupid. Alexandra believed in everybody because her mother told her so. That is not realistic. If someone tells you to sign a contract for a house, then you realize that you have been ripped off. Nobody will protect and even the law will not be with you. You want to be stupid, that is your problem, not ours.
There is another problem, When Alexandra handed the throne to her step brother who is not of the royal family, how come the ministers didn't object? Didn't the previous king has a son! Yes, he was delinquent but he changed his ways. Couldn't they call him over, to the be the new king?
Although, I'm in love with this old style manga, I'm not impressed with the conveyed message!!
What will happen to a lovely princess when she gets blind after an accident?