All of y’all really need to chill...this is a historical fiction. HISTORICAL. Yes, these things in modern time is very concerning and there’s nothing wrong w/ being concerned or upset over it. BUT in ancient China those of Yoon’S class literally could get away w almost anything bc of the hierchal structure. Not speaking on anything Nakyum will do, but I’m speaking of the authors intentions. Stop acting like the author holds these thoughts or opinions for their self and just go with the story. Just because a character acts a way in their setting and time period doesn’t mean the author agrees, either... things will play out in a way that pleases everyone.
Well in historical Korea I dunno the protocols but the Victorian age would have had this type of sexual indulgence but nobles couldnt be as open at it as Yoon but they pretty much could do all this stuff too, again though they pretended to be lords and ladies in public whereas Yoon doesnt give a fuck and flaunts it.
There were actually many, many gay men who had orgies back in that time period in both Korea and Japan. I'm sure they weren't openly gay as you mentioned though. We've had political corruption as far back as the Romans so I don't think it's too far fetched to say there weren't other murders that happened that were covered up.
But I think it's important to remember this is all a work of fiction. I understand getting emotionally invested in the characters though.

If both fall in love for each other I will feel really uneasy. I mean... He raped him and hit him, make him bleed... It's very toxic. Yeah realistic, but it doesn't change that romanticism in this manhwa will be seriously uneasy and not a good idea... Perhaps love, but NK happy with that crazy bastard ? Hmm... I just don't want romanticism. It's too violent in symbolism and story in general to put something romantic. I prefer that only Yoon be in love and NK never really love him, it's more realistic for me.