beta
Assuming Jaekyung is the root cause of Kim Dan's issues(which ive seen in a lot of comments) is an overly narrow reading. While Jaekyung most definitely has major attitude issues that exacerbated Kim Dan's mental health, the root cause of Kim Dan's issues is that he has abandonment problems that stem from the loss of his parents at a young age. It's shown in the story but especially lately that that's why he tends to cling to things rather than live his own life(his grandmother, Jaekyung, the puppy). His character arc will probably be learning to let things go and should focus on how to be alone(IDK how jaekyung is gonna help with that though).
Jaekyung has an extreme obsession with success that manifests in aggression towards anything that detracts from it. His desperation to find Kim Dan doesnt really seem to be out of love(yet). It seems more like he believes his life falling apart began with Kim Dan(rather than his own choices lol) and so finding Kim Dan will provide some sort of redemption.
As of now, I don't see how this couple could work out UNLESS they go the crazy4crazy route(which honestly is fine with me if well done). They have major personal problems and I don't see how the other can help with that unless they literally just stick together. It'd be like sticking a bandaid over their issues. They'd solve the symptoms(perceived redemption, companionship) but not the root cause. I've seen stories do this before but Mingwa's previous work focused very much on reaching a healthy relationship dynamic.