Aemi

I don't consider this as open ending. I'm pretty satisfied with it. I mean we can see them happy together and that's enough for me. A lot of dramas end with scenes about their future/wedding/kids etc. but I like this one better.

She gives people fake signals and then acts as if nothing has happened. This behavior can hurt people around... for example how senior Chan-Woo treated Mirae. And senior Tae Young seems like a sweet guy, he is just confused and SooAh manipulated him. I agree he has weak charakter, but he is not a bad person. There are people like SooAh in the world and it can be really frustrating to see this kind of behavior in real life and in drama too. But i think people like that has some serious problems with self esteem.

As Do Kyung stated, she never liked him and any other guy. She is just manipulative and has inner problems with herself. She tries to make sure that everyone admires her. She gives boys fake signals what makes them fall for her and then she acts all innocent and uninterested in them. You could she the pattern of her behaviour at the beginning with senior Chan-Woo, because Chan-Woo liked Mirae and SooAh couldn't stand any guy to like anyone else than her... the same goes for Tae-Young and Do Kyoung. I know people like that in reality, so SooAh's charactes really annoys me lol