I get the idea that the writers wanted two characters with completely opposite characteristics to show the contrasting introvert/extrovert theme (opposites attract, romantic relationship in the works, positive change in both characters ensues, etc) but I felt maybe they made Chae Ro Woon a bit too strong from the start. I'm fine with her character in a sense that I predicted she'd be a bit headstrong and somewhat confrontational, which would eventually force Hwan Ki to break out of his shell, but they took it to another level in my opinion. Judging from the first few episodes, her actions and behavior were off-putting to me because as a viewer, I'm already aware that Hwan Ki has issues with social anxiety and even though it's a given that Chae Ro Woon doesn't know about that side of Hwan Ki, or anything about him for that matter, it's a bit uncomfortable to watch her continuously provoking him, being somewhat of a bully, and pushing him to the edge. Not to mention invading his privacy, instigating internal company issues like with the secretary, and not feeling any remorse for her actions. It's always about how she feels and what she wants while everyone else is wrong. Her prejudice towards him makes it hard for me to consider her as a possible love interest for him or a likeable character in general because she refuses to be open-minded about anything. It's obvious her sister's death and the mystery behind it was traumatic for her and is now preventing her from making any rational judgements or even try to see the bigger picture when it comes to Hwan Ki because he's the CEO of the company where her sister worked and she's already blaming him for her sister's death. But it's not just her though, just about everyone in this drama so far seems to be judging Hwan Ki when they don't know anything about him, it's just that she goes the extra mile in harshly criticizing him.
This is only the beginning though and like many dramas, it takes a few episodes for some characters to change and develop. I'm not going to stop watching because of her character because I'm a fan of Yeon Woo Jin and was looking forward to seeing him in a new drama, but I hope that with the newly revised episodes coming up, there will be some positive changes that can help move the drama in a positive direction. I want to like her and understand more of why Hwan Ki likes her so much as well, but so far I can't see why he would be so smitten with her when they haven't shown any redeeming qualities for her character.