They didn’t end up in some way (no reincarnation whatsoever) but its kinda ambiguous to say since the scene end with a possessed joohwan reaching out to the emperor.
Read here for interesting theory :
https://www.reddit.com/r/boyslove/comments/13nkorh/did_anyone_read_haunted_by_desire/?rdt=54368
*they did
They did?? In which chapter?? Or instead can you tell me how did they end up together?? If i remember correctly that ghost disappeared and he(shaman) was searching for him...
In the ending scene side stories ch.15(end) showed that joohwan performing exorcism, calling for Lee Seon the king, right? He then possessed by his previous life/spirit a.k.a Cheonseong & well…. Its all in the topic link above, this reddit user (Livinginfiction473) explained it in details(7 months ago) based on his/her/their theory/understanding but i think its accurate to say it is until(if) the author explain/clear about it later.
And the scene/main/side stories ended there as a wrap : exorcists fainted, cheonseong’s reaching for lee seon, embracing each other, disappeared, might be anywhere who knows but for sure out of joohwan’s body.
All in all, they both got what they want : to be together
Oowww... Thanks a lot
God.... I only remember 2 characters.. Like that shaman and the main lead seme... If I remember in previous story shaman and that ghost didn't end up together right??