The art is good but the summary is....
Dian is a maid working for the Marquis of Lowell?
To help her lady escape from an unwanted marriage, Dian sends her out the country and assumes her identity, going to the castle of Margrave Evenhart in her stead??
She's a maid and have a way to do that? Are their faces similar? More like she's taking an opportunity of her naive lady cause she's hoping she can be a noble by married another noble. If not, their difference will be pretty much laid bare. Education, 4 art skills, etiquette and manner, in the past some maid is illiterate and the way of speaking also different (including choice of word).
The Evenhart family, famous for guarding the North for generations, but never leaving their territory, is a subject of great mystery to the outside world. Will Dian’s identity be discovered? What romantic story will unfold in these days of cohabitation?
I can say if their face is different, yes. Even a political marriage will have each picture to show the other party. And a noble normally have a debut since young age, let alone a marquis who's positioned under royal family and duke only. It's pretty easy for the other party to test MC such as asking news and things related to noble circle.
There's comment about internal monologues (and yeah, I don't quite like it if it's too much just like earlier chapter of Beware of the Villainess)
So I wonder if this is good???