Comment by Aeerst on Panic

After they leave the emperor's bedroom, Jisung tries to make Cho-ah leave with him, however Mujin keeps following them.
Cho-ah then tells Mujin that he doesn't want to be with him anymore, and tries to leave with Jisung.
Overtaken with anger, Mujin gets "possessed" by Sura then beheads Jisung and cripples Cho-ahs feet so he can't leave him.

Straight afterwards Mujin carries Cho-ah back to the palace, where he beheads the former Emperor and takes the throne.
The current emperor (Mujins brother) asks "Sura"(/Mujin) to have a fight with him, however ends up being killed by "Sura", making him the new emperor.

After killing the Emperor, Mujin takes Cho-ah in the palace bedroom where they have an argument [+ noncon s** scene]. Cho-ah asks Sura to kill him, but Sura tells him that his life is now Suras.

The 'main' story ends with Mujin/Sura being crowned as the Emperor, and Cho-ah being tied up to a cross filled with roses as a sacrifice.
Just as Mujin is about to behead him, he stops and ask Cho-ah if he's willing to live for him.
[Im not gonna spoil his answer to that though]

+ 3 side stories, spoiled in next comment