If we go by what happens to the soul of og body in other stories then he is either dead, got isekaid into Korea, or possessed another body in the world in which the story takes place. Most often it’s the first option, rarely the second, and almost never the third.
If 3rd scenario happens, things are gonna get dark at some point
I read he raws and just from the images it seems like the og lover of MC was shady, he may be revealed as a villain and the current ML will become the real love interest.
Bro is this like isekai but the love interest's pov I get that feeling, but what happened to the original owner of the top's body?