
Bro ngl at first I thought the mc wasn't really scary as a loan shark, like at most the furthest he will take it is non life threatening body harm like with that gangster who owed him money, until the chapter where he ganged up with other moneylenders and sold the guy???? Human trafficking is fucked up, I was wrong and I apologize to the mc for showing him disrespect
*edit: when I mean mc, I mean the uke

Bro can someone explain to me joohwan (the messenger/shaman) and the emperor's ending? Did joohwan became a ghost or a demon and took the ghost emperor away to be together???

Joohwan and the Messenger are two separate souls in one body. Because the Messenger couldn't get this wish in his past life, Joohwan could not be happy. The messenger is in love with the King and wished to be with him. So whenever Joohwan was sleeping, the Messenger went to look for the King. It was not the King haunting Joohwan, it was the Messenger (aka "haunted by desire"). At the end, the Messenger part of Joohwan's soul split from his body and fused with the King's spirit (hence he said "I'll give myself over to you. So give yourself over to me"). Their souls are now sealed together in the Shaman's bell. In a sense it's a happy ending because both the King and the Messenger got their wishes granted to be together forever. But it's self destructive, almost like Romeo Juliet ending. As for Joohwan it's an open ending. Did he die or the remaining of his soul lived on and now he can be happy because the Messenger got his wish? I don't think the rest of the people died, they were just sleeping. The King was just shown to be killing all other ghosts/spirits to keep them from Joohwan which explains why he hadn't seen any ghosts since the King left.

I agree with most of this aside from the fact that they're both separate souls, they're the same soul just with different memories, in the sense that once a human is reborn his past memories are all forgotten.
but because his past self couldn't get his wish fulfilled because he spent too many years collecting souls to the point that his majesty - whom he wants to see and basically ask why he did him dirty - had already become old and sickly but he did forgive him since he wished for him to live longer, but of course that wasn't the closure he wanted so his soul couldn't let go of the love of his past.
the sleepwalking part is his past self subconsciously getting him back to the one he loves but he kept believing that it was the "demon" luring him back in.
that's why by the very end of the chapter he was shocked that it wasn't his majesty luring him in "it wasn't you?!" which tells us that the one summoning the ghost very willingly because he misses him is actually his current future self whom by the end decided to give himself to him so they can live together again he also remembered most of his past thanks to his +2 years of dreaming about it.
I think he died because of what Duhui (I can't spell his name sorry) told him, about the shaman who was lucky to not suffer the consequences - sudden death - and advised him to not do what he did, and we can clearly see that it took a toll on him because of how physically unwell he got which eventually killed him, and which eventually gave them their very needed happy ending.
Stop edging us god damn