I'm confused, wtf happened;
So he was this all powerful person in his last life (I think) and he fought in the war with the monsters and against the white people thingy and he won. Afterwards someone betrayed him so he killed them. While killing them their eyes looked like the king's and after killing him he realized that he WAS the king. What really happened was that with all the power that he had he grew a second heart meaning he basically turned evil. After that some white beings came down. And that's where the Chapter ends.
Quick Summary: This was the memory of someone not sure who (could be a shadow sovereign or just a reincarnation) What happened in the memory was that there was a war between the demons and the silver being and there was someone who could control shadows like Hunter Sung. He helped the demons win. Later someone betrayed the shadow controller which turned out to be the king. What really happened was that the shadow controller had turned evil cause of all the power he had. At the end of the chapter silver beings came down.
I see a lot of people criticizing and trying to correct either the uke or the seme for their actions and saying that it's their fault that their life is like that but what would you do if you where in their place? you try to correct them and say they're wrong but would you actually do what you're saying it's right ? Also please understand that this isn't reality and don't take it to seriously, just enjoy the manga without criticizing, you can't expect everything to be perfect, if it was, there wouldn't be a plot and I'm sure nobody is perfect and everyone has made mistakes in their lives either small or big so don't rush to criticize peoples because you don't know how they feel and what you would do if it was you. If you have nothing nice to say, don't say anything maybe the world would be better if everyone does that. ( sorry for my English but I'm actually from Greece and it's not my first language)