I don't like what they've done with Jiwon. She was an unlikeable asshole who deliberately played with the feelings of boys and targeted Kiryong just for amusement, personal satisfaction, and a bet. That's how she was introduced before she got taken down by Jae-Kyung.
Then, ever since that one stalker/creep arc (bad arc, by the way), she has done an almost 180 degree turn in an effort by the author to make her more likeable and a potential live interest. She's given excuse after excuse and then chance after chance to just be a more appealing character when it doesn't actually fit the writing. It's bad writing.