
Communication is always the key. They lack communicating their feelings and honest thoughts, or at least the prince lacks it. He could be more honest why he doesnt want doram to leave and protect him, instead of putting it under the guise of a house arrest. That just makes doram (or even anyone in theat position) to find freedom and escape, all the while seeing the prince as the suppressor

Jinwoo's nightmate might have two sides. One, he associated gunwo to the killing of his father after the murder incident and tthe doctor's story of how gunwo murdered his family. It's how the mind interprets fear, the mind is so strong it could create a whole new memory that doesnt even exist and make you believe its really what happened. Its a trauma response. The second, the nightmare could also be the reality which was triggered after the murder incident. It could be that gunwo really is involved in his father's death but jinwoo forgot about it since it was so painful and he himself was almost half dead (based on early chaps) and therefore he's hallucinating in that state and couldnt understand that it was gunwo who killed his father. Again, his memory loss is a trauma response and the trigger of memories recently is a result of what he has seen and heard guwon do to others.
You guys his name is Pookie