Remembering what Myung said on the second floor balcony earlier made Haito's heart warm. He doesn't know if someone like Myung is really there for his sister. The one who marries without seeing who he marries; the one who takes care of Haneul even though the girl is being exiled by her family and still feels grateful for it.
Now he knows that human values don't just lie in who he comes from, who his family is, and how much money they have. Although Haneul has the appearance of a royal princess, her current state of being isolated by the family makes her actually just an ordinary girl. It is not supported by anything and only carries itself. And the funny thing is that Cho Myung said that he felt lucky to marry that version of Haneul, not the Haneul that everyone used to know as the Royal Princess of the Shin clan.
Myung is wrong. Haneul is lucky to marry him.