Don't tell me they're apologizing because they were purposefully trying to destabilize a neighboring kingdom and she was a casualty of it, along with the usual cliche of him falling for her during that time and becoming conflicted because of it? Or worse, he fell for her and purposefully set up to worsen the situation and ruin her engagement and somehow missed her on the way out so he's been searching for her? I read too many of these, don't I...
Because if it's the first one, it better take him a long time to get some sort of forgiveness from her and if it's the second one, it's unforgivable and this is gonna turn into an unintentional horror... *cough*like that other "comedy" series where she's trying to escape from princess training with the creepy crown prince...
Either way, it's already known that they're gonna be a couple based on what this series is and I bet "there was some reason he had to pretend to like the sister but he never liked her and actually liked fl", but I still hope it takes him a while and actual, sincere effort to earn her forgiveness :/