I'm pretty sure Jeon's similarities to her were made that way on purpose to make bedding him more difficult. To trigger his thoughts of, "...you look a lot like this whore I had sex with of whom I (probably) have feelings for..." creating the "sexual tension." I am almost positive he has feelings for her but, officially, they are nothing more than people whom had sex together in the past. Then again I'm not too entirely sure why she would want to kill the people associated with Jeon unless they were family or smth but...who knows
Disclaimer: I know just as much as you do as I do not understand nor have I looked at the raws. Everything I said is just my opinion on what I have noticed. None of it is official just observation that may or may not be proven wrong as the story continues.

Okay so who’s the girl? what’s his relationship with him? does he have a feelings for her? is it just me or does jeon looks a little similar with the girl??