Absolute crap, in terms of story development. How they could even think this story was ok, she is the worst female lead character I have ever watched, and I watched countless K-dramas.
Uselessly dramatic, self centered and egoistic, doesn't answer questions, instead asks a question back, lies blatantly to everyone, even to herself and complicates everything without reason. Traumatizing everyone around her with illogical and extreme behavior. I guess it can be still true and these people do really exist but they do not deserve a whole drama on them and also still no point in how she found her happiness it's really unclear. Disappointing