
guys!! don't give up on this manga yet!!
I actually changed my mind after I glimpsed the raws.. read a few more chapters before you make your decision! Its totally cute!
https://comicpash.jp/kisaki/
(〜 ̄△ ̄)〜

Well it seems like shes getting what she wants gradually cause hes only keeping her in the castle to keep her from running away (and to try to show her how he feels for her). And he wants her to act more like herself so she can still be free from the confines of etiquette, as she wants. Shes being pampered and she likes it (which is why she purposely tries running away more cause shes set of being free from him even though shes falling for him too)

He could show her how he feels by visiting her and spending time with her. Confining her isn't necessary for that.
Actually if he had made an effort to get to know her from the start instead of taking her for granted there wouldn't even be a story because she may have left. He screwed up. I'd say that he took for granted that he could have whatever he wanted without effort, but considering that it is fine for him to drag her back and force her to stay in the castle? Then he was okay to assume that he'd always get what he wanted since apparently being a prince means that he can kidnap people.
Anyway, I won't be reading this one. Just wanted to reply to your comment.

I read the instagram transaltion of the next chapter on @manhua.translations
her plan backfired on her sooooo BAD!
Bwahahahahahah.... (≧∀≦)

but, incase you don't want to do that...
SPOILER ALERT!!!
Basically. the older sister's plan to try and blame the FL by acting like she was pushed backfires on her when the guard interferes. So she ends up looking like an idiot for falling in the middle of the ballroom when nobody pushed her and nothing could have tripped her. the nobles start to gossip that maybe because she didn't have a good childhood and didn't learn to dance she was jealous of the FL and tried to sabotage her. Its KARMA really! ╮( ̄▽ ̄)╭
also, a sidey character tries to interfere by blaming the FL for being mean to the bitch sister but our king comes back by that time and puts a full stop to that SHIT. it's a very satisfying chapter all in all! ε=ε=(ノ≧∇≦)ノ
Who does this asshole think he is??!! my blood is boiling!!! you don't deserve Alex or Brad and I hope that they throw your ass in a mental institution before you hurt anyone else... you psychotic, insensitive prick!!! ヽ(`Д´)ノ