
I think Joowoon uses this as an excuse to jusitify his controlling behavior towards Heasoo. Heasoo might have devloped feelings in the past. But I also thinks he knows what Joowoon feels is not romantic love, but possessive love (if i can't have you know one else can). He wants him for himself and Heasoo knows this and is irritated by it because he cannot lead a normal life on his own without Joowoon interfering. This is where K gets in, he will be the Exit Heasoo needs to gets away from Joowons possessiveness.
I think this can get ugly, since people who think someone is their object of their desire. They have the absolute right to do whatever they want. And when they cannot get what they want to go down hill fast. I hope Joowoon wont end up being a misarble alcoholic, but the only way is for him to realize that he doesn't love Heasoo and move on. But yeah that is the biggest problem, those people don't see their own flaws and will never admit to them.

I want to see them crumble, I want to see the relationship between Heasoo and Chowoo being shatterd to nothing but tiny pieces unable to be put together. Somehow this manwha tickles my sadistic nature. I really want to see some good scheming, Not the usual pussy fuss, I want to see some real hurt and some real damage. This story is getting good!
These wounds won't seem to heal
This pain is just too real
There's just too much that time cannot erase
ヾ(☆▽☆)