I think it's cause she's the one who guilt tripped mincheol into rejecting Haneul. And she's acting like she just overheard them when you literally instigated. And then she comes around saying this is fate when she probably went looking for her cause she knew it was her bday. Then gives her her most precious "item" instead of a gift and tells her she should move on. Like I agree she ought to teach Mincheol a lesson but YOU don't get to tell her that.
OOOHHHHH I HONESTLY FORGOT ABOUT HER she didnt even come across my memory even in that scene oof im getting the chills but i wonder what she means by “lets not be sad” does she mean she wants haneul to be in the same boat as her i may not know their past or what happened but if SHES that type of character that plays the role of an ex whos bitter and plans to destroy their relationship then im assuming shes jealous of haneul internally
I really like the idea of that guy falling for her cause he gives off a complex character thats ready to yearn and change but i dont like the idea of haneul ready to accept him just because she “moved on” when in reality she just wants something to distract him and thats the 2nd ml

Why is she “creepy”? And i see a love triangle going on i just hope i don’t witness haneul making bad decisions over a heartbreak and speeding up moving on cause thats a really common and cliche mistake people do