NOTHING

He's actually done a lot for him if you think about it..? I'm not saying that makes him forgiven, but he's definitely done things for him

and he's getting things out of it too, it's not like it's some sort of selfless help borne out of his empathy towards dan's situation.
jaekyung finds dan hot, so he fucks him. jaekyung gets his jinx fixed, dan gets money. it's a transaction. there's nothing romantic about that, which is what i'm sure op was referring to.

Even though Jaekyung gets something from it doesn't cancel the fact that he has done a lot of things for Dan. They're not in a romantic relationship yet. My opinion.

Sorry I realised that I should have been clearer with my statement. I think jaekyung has done nothing that should make Dan fall in love with him. Yes I know that falling in love can't be controlled and sometimes it's for the strangest reasons but in this case you can't help but think that jaekyung has done nothing personally for Dan. The ONLY solace I will give to jaekyung is helping out his grandmother and showing some humanity through that. Otherwise all he's really done for Dan is support him financially while screwing him on the side so I really don't know what Dan's falling in love with unless it's with the way jaekyung spends his money....
But im still reading so