
um, pretty sure the writer is building to the kid sleeping with someone with the wet dreams and the mention of him being a virgin. Virgin ukes are as classic in Yaoi as psychopathic, borderline-violent semes.
The writer could punk as all hard by having an psychopathic, unpredictable seme used to getting what he wants who grows into a better person through his platonic friendship with the uke he threatened and held captive for porn, but somehow I doubt it's going that way...

You both call it a wet dream, but there is no indication that he was even remotely aroused from that particular dream. For me it’s more like a nightmare that is a product from his captive situation and the lustful sex he was forced to witness.
Of course I am fully aware that the chance our painter will remain untouched till the end is almost close to zero; but I believe he is more likely to suffer from rape. Do you call a rape victim uke? I’m just really skeptical that he will ever be in a sort-of consensual relationship with our psycho lord, and for that very reason find it weird that people just jump on that ship at the get go and start calling them “seme-uke”.

Geez, nothing has happened yet. Everything is hypothetical right now. So bashing people for their ship when we don't know how the story will unfold is silly. The uke has not been raped.
And the seme asked him in the dream, "Which of these things aroused you the most?" Very much implying that he was aroused by what he saw. Plus when painting the threesome he jacked off after. Yes, he is aroused by these things.
You're jumping the gun on things. You don't know where the story will go. But boy you already want to attack others for their opinions.

Well, I mainly just disagreed with you. You said, "there is no indication he was remotely aroused" despite the seme in the dream saying "Which of these things aroused you the most?" which strongly implies that the painter knows this stuff turns him on at subconscious level. The writer did not just throw that line in there. They are establishing that the kid is aroused by the stuff his paintings are based on . It's something he's likely dealt with even before his captivity. His feelings towards his teacher are also likely more than just platonic.
I think you are wrong. It was very much indicated that he was aroused by that stuff. I do agree though that it is a nightmare as well. He is horrified by the things that aroused him since his teacher/ crush would never approve.
We really don't know where this story will go on the rape thing. So far the only forced part has been the erotic paintings and watching the seme engage in sex with consensual partners. I found in most yaoi stories where there is rape, the rape usually happens early in the story or after a lot of dubcon. This hasn't even done that.

Imagine you are being held captive by a sexually active pervert who thinks everyone wants to sleep with him. You are scared and disgusted by him touching you inappropriately and slurs stuff like “You like this? Are you aroused by this?”.
Are you?
What I mean is, while the dream does sometimes reflect what the dreamer wish for, it also reflects what that person conceived of the environment and objects around them. The lord in his dream can simply be a reflection of that guy in real life. He does seem to be the kind who talks dirty like that, right? The time he was aroused by witnessing them having sex and had a boner, though, that was true indeed but it still can’t be connected to him having any feeling to the lord. Replacing any guy into that scene and he would likely end up with the same reaction.
I am totally open to disagreement and constructive discussion. I am by no mean bashing anyone’s ship or calling names. Everything is only hypothetical at this point, like you said, so my theory is as valid as your theory. If it turns out like what the majority of readers here seem to be expecting, doesn’t mean anyone was wrong.

Um, I think you're reading too much into this. This isn't real life. Dreams in stories are generally just methods for writers to tell things about the character or the plot that they can't tell yet in the story. They're used for foreshadowing.
So arguing about what they mean in real life does not make sense here.
The writer who has to tell a tight story in a few panels. The writer is a talented storyteller, but they are they are throwing in very obvious cues to what they want to say about each character.
The "dream" method is just a way for the writer to convey a subconscious desire in a character, something they are not consciously able to admit yet. Or to foreshadow or tell flashback or things about the plot. They are used with a purpose in storytelling.
I doubt the writer wants to waste half a chapter conveying that. It was Yoon he saw in the dream. The writer is giving a very clear message.
I don't think he has emotional feelings like love to the lord, but that dream was clearly a way by the writer to show that he is aroused by Yoon. He doesn't want to be, but it's there. The dream trick is also a short way to put the two together and keep the reader's attention since it's going to take time in the actual story for the two to get together.
The writer needs to keep readers in engaged. With the dream they can put the two together early in the story without putting them together. It's a promise of where this is leading.
But I am fine to agree to disagree.
Do you think it’s a bit too quick to call the painter uke and assume that they will sleep together? Or that he will sleep with *any* man at all?