what awful stuff? i have forgotten most of the story since i caught up like 6 months ago.. or do you mean the awful stuff when yeonwoo was in middle school?
The most problematic one gotta be her family. I have a feeling that maybe her aunt is gonna give them a hard time in some sort of way. I dont see what the dad/mom could do to fuck up the current state that we are in since both of them got new families and dont seem to give a fuck about her (maybe the modeling thing that she was forced to do as a child gonna come back to haunt her as well, since a creepy guy appeared in earlier chapters claiming to know her and kinda asked her to go back to modeling). There is also the Junhyuk thing, he almost killed and taked naked pictures of the guy who bullied and sex assaulted yeonwoo.
Honestly, if the author could just leave it be and give us 50+ chapters of slice of life wrapping up the story with the other couples + the wedding of the main couple, i would be quite happy. I dont think that we need to close things up with her family / the bully from middleschool cause the author got plenty of justifications for them to not appear or give trouble to our MCs anymore (the bully was completely destroyed by junhyuk and her family literally hate her and doesnt seem to care about ther, so what would they possibly gain to mess up with her in this point of history?)
But thats just my wish. I do think that we're going to have 2-3 more heavy drama arcs, sadly.