It is a shame. He did learn nothing from his mistake and just because a girl is looking at him he decides yeah she is definitely trustworthy and I break my promise not to do it again. And I even do it with other people. So how is he refusing then to do it for other counties as well? This whole PL thing is a disappointing turn in the plot imo. Like someone else in this thread I'm wondering as well if he will meet the princess again. Is seems weird that she wanted to marry him in the first chapter but she is never mentioned again.