I really like this otome-style series. It's a breath of fresh air for the "villainess" and the prime "capture target" to be friends from the get go. In so many of those stories, it's said that they used to be close in the past, but ends up with them not5 being close when the heroine enters the picture.
I like how it is in this case, with both of them understanding and being willing to live according to their status(such as with them originally being fine with marrying each other even without love due to them marrying as friends being preferable to marrying someone they don't like due to political maneuvering).