beta
I'm calling it now. I think they had some sort of accident before college.
Mincheol is a sporty person and we see in the latest chapter that he has an injury cause he had to stop running (chapter 28). It has been bugging me (from chap 18) when it was revealed that Mincheol wanted to go to Phys ed and did a lot of sports in highschool, but is now in the business major. I thought it had something to do with Haneul and was scared tbh that the only reason he didn't go to that major was so he could be closer to her, but now I see that is not the case and is actually because he couldn't go cause of the injury.
When we pair this with the fact that she is always seen wearing her wristband, I think she may be covering a scar from that accident and that Mincheol possibly gave her that wristband.
She doesn't strike me as a person that is self harming, and I don't see the characters around her and her close friends being wary of her mood, that type of tendencies or generally behaving in any way that would indicate that.
ALSO I analyzed all the scenes from the flashbacks and she is not seen wearing the wristband in either middle or highschool. Also maybe something will be revealed at the reunion, cause Mincheols injury storyline has been building up to this point.
I would like to hear what the rest of you think? (=・ω・=)