Jaekyung will have to have been hit in the head several times and would need to be lobotomized for any sort of positive change to happen in him. There better be a “oh fuck Dan has always been there for me and I’ve treated him like shit and viewed him as a sex sleeve all this time.. I don’t deserve him by my side in any sort of relationship whatsoever” and laments for a good long while and character development happens around that realization instead of *Jaekyung gets injured or granny’s dying the night before a match and Jaekyung wouldn’t let him leave to say goodbye to his granny and fucks him while Dan cries through the night and then dan runs away* or *dan runs off before Jaekyung could have a satisfying fuck and gets mad at dan for it despite dan wanting to say goodbye to his grandma and he stays at the hospital or a friend’s place the whole time not answering his messages so Jaekyung loses a match and shouts and yells at dan which causes a rift and dan sends a letter of resignation everyone convinces him to stay blah blah blah character development they get together live happily ever after*
What I'm saying is that the creator literally confirmed it, I'm aiming at the people in the topic section saying heesung and Dan would be cute together (it's kinda true). J think mingwa is making it like bj Alex (since they're the creator of it) because bj Alex went something like this just less...harsh. but if he does become nice like how mingwa said I'll be shocked tbh and I can see where you're coming from but that was a long ass message and my glasses were broke I could barely read it
Rest of message: or Sick family member of uke is on death bed on important day for seme and then seme gets pissed and abuses uke when uke leaves during either sex or doesn’t show up during important event and the seme has some sort of failure be it injury or losing during an event or something else happens.

Y'all do know that mingwa did say that joo and Dan will become nice to eachother later in the series (confirmed in the 'hitaus' chapter) so I don't think heesung and Dan will become canon heesung is a cutie patootie tho(ㆁωㆁ)