I can't find the manhwa. The seme is obssessive and hide the fact that he's the reincarnation of the emperor who cause the uke's trauma. They became friends but the uke still has doubt. Before dying the emperor made or perform some kind of ritual in his back so their soul will be tied (something like that). He even hired someone who look like him to give the uke a trauma from going overseas and to make him believe that he's not the person uke despise
I thought to myself what the fuck is this but i actually have two guesses:
https://www.mangago.me/read-manga/rebirth_1/
https://www.mangago.me/read-manga/palace_of_bardo/
Could be neither since i read these long ago and dont remember the last part
Yooooww yessssss my begging is worth it