I found that so dumb. If she really has gone and gotten a new bf the one who said he wants to marry then I’d like to tell Won Seok to forget her. If she can decide to just marry anyone just to marry it’s useless trying to care for her. She only wants the dress and the trappings the guy in interchangeable. I don’t want to be to harsh but unless this is a misunderstanding- I don’t think I can like her. I would hate this to be a ploy on her part to try to get him to be jealous. I don’t like people who play with other’s feelings like that.

I think, because she got a haircut –> indicates a change of heart in the character. She is not going to wait any longer. Call her selfish or whatever (I don’t like her either), but her desire to be married and have children is valid, and that is clearly not going to happen with Won Seuk. She has the right to marry someone else, though I didn’t think she’d rush into another relationship.
But it does happen in real life, people!

I really don’t think she was expecting Won-seok to be there. She was probably hoping to just grab her things and leave thinking when Won-seok saw her stuff gone he’ll know what that means (or message him later).