Gonna hard disagree on that this isn't deep. Her reactions are the "comedy" tag here, and they are hilarious. The deepness comes from her actually taking her ruined childhood and how she doesn't want to be with him or in these situations he keeps putting her in seriously.
She's warming up to him, but that doesn't erase all his behavior and her no's. 1000 no's and a yes isn't yes even though it's no longer illegal... he quite literally imprisoned her. He even feels bad about it, he says he "didn't want to do this" before imprisoning her when she rejected his marriage proposal.
His rationale for all this is that it can't be helped because he "can't let her go" even though he says himself that he saw the princess training change her as a person. Even seeing her suffer for TEN YEARS he prioritized himself and when she went to leave him he tried to bribe her with that the training was over and that he'd give her the best life, when she said the damage was already done and said no he literally imprisoned her. It just layer upon layer of actual evil he's stacking up.
Idgaf! It’s not that deep
This is hilarious! I like this manga a lot. But everyone is taking it so seriously. It’s not that deep.