The FL is tricked into marrying OGML, who is in love with her and cares about her a lot, well more than obsess person type. He knew well that she will reject him without thinking if he said he is the Prince because he was well known to be a follower and had a likeness towards OGFL.

FL had multiple through that she was been used and all the things ML did was fake, but couldn't do anything because of her social status (I mean she is the daughter of a very low-rank noble, and ML is the highest-rank noble with his brother being emperor), being a woman, having no money, having no support for the family, and having no one to get help form. So basically she is trapped in a fraudulent marriage with no way out, even if she tries ML with trying to stop her, also since he is decision will be more valid than hers. While hers will be invalid because of his status.

Marriage and love are one-side (by ML side), but there is a very slow development (on the FL side). At times FL seems to give up on life and accept bullsh*t for the people.

I find it annoying when FL's family didn't believe in her when she told them that she did not harm OGFL. It's more annoying how the Adopted son through so poorly even of FL, though he was blessed to be in such a nice family he blindly supposed OGFL and thought she (FL) deserves to be tricked/used by the Prince (ML) who has liked/crushed on OGFL.

Now, the reason why I feel like there's no reason for the differentiation is because absolutely NOTHING is being addressed in the first 2 chapters. The author just jumped straight in into the story with the MC and ML getting married. There's no "why they did it", "when they did it", "they discussed it" at all. You just see the MC saying she has to get married as soon as possible so she doesn't get dragged into the main Villainess plots which quickly gets annoying because girl repeats SO MANY times in the first chapter alone. Hell I don't even know how they met and what sh*t was agreed.

And so far, the marriage seems terribly one sided. MC mentioned that she would divorce when it's safe for to, but by the second chapter the ML is already trying to take her to bed, hence kissing her. There's no indication of what went on, why they are marrying, is there even a contract etc. I wasnt expecting myself to get immediately thrown into the story so it's quite a shock.