So I’m currently on the first chapter but can someone explain it to me

So basically a 16th princess in a forgotten part of the castle lives on her own like forever and before being married to an old bastard, which she’s experienced before because she’s reincarnated, she find someone else, she tracks them down they make a deal, and then there’s something about his family and something about her, secret secret hush-hush, but obviously they love each other wink wink but like they portray their emotions and thoughts well so it gives me the feels