They're not brothers. Never will be.
I know they are not related by blood but they see each other as brothers first and i think in a less toxic relation they would be more happy with our without K. They dont need to ignore or hate eachother like this it just make it more difficult
They're literally in love with each-other, they never saw each-other as brothers which is the reason for the whole messy situation with their parents.
I really cant call it love (〜￣△￣)〜
Huh?? They both BEEN in love since highschool but Joowon felt GUILTY at the time so he pretended not to like Haesoo and even told him to not have feelings for him (after it was way too late) so Haesoo thought that he was telling him that because he didn't like him thus an UNREQUITED LOVE so he kinda held a grudge this whole time because of it. Which eventually lead to the shape of their toxic relationship at the beginning of the manhwa.
It was after Joowon felt that Haesoo was going to be taken away from his side that the readers were let in on the fact that Joowon loved Haesoo all this time and his whole life basically revolves around him.
I like joowon but they are much better as brothers, stop hurting each other bruh(●￣(ｴ)￣●)