I've reread chap.40. Goodness, I think you're right, it's possible caused Hwan said "... as I've hope." Just like he's expecting it and really sure of it. So that means, it's possible that is his wish and it's granted even before he met Moony?
I'm a little bit confused because he said on chap.38 "I was scared because it seemed like you were trying to distance yourself from me... I felt like you were avoiding me... So when Moony showed up and offered to grant me a wish, I couldn't refuse." So I've been thinking, maybe he met Moony during teenage years and that the accident that happened on their childhood days is only a coincidence or something like that...
dude yeah it's kinda confusing. i'm thinking it's possible Hwan was lying when he said "...when Moony showed up and offered to grant me a wish..." because remember he was also faking crying (ie that sinister smile). also it seemed that Moony was actually the one following Hwan's orders, so does that mean that Hwan is the one in control here? idk wth is going on but everyone needs to get their shit together
SPOILERS UP AHEAD BUT-
so hwan was the one who killed his parents?? AND he fucking made those monsters that molested and raped him and scared him?? okay. OKAY. just throw the entire man away. fucking hell i thought he was cute (lacking flavor but cute) but now i fucking hate him. not to mention i was hardcore simping over jin the whole time like "THIS MAN IS LITERALLY PERFECT PLEASE" if the author makes hwan and chiwoo be endgame im gonna be so mad i swear dsfjhdsjkfsd