
Aw, I get it now! Remember the flashback of Little Mo getting accused of theft by the kids. Now we know that She Li and him met as kids. Likely they went to the same school then as well. Wanna bet that the the "favor he owes She Li" is that She Li saved him from those false accusations as a kid and took him under his wing and essentially giving Mo "protection" in return for loyalty.
Also wanna bet that it was likely She Li that stole the items and framed Redhead for the theft back then so that Redhead would owe him?
In 175 we see She Li trying to "save" Mo by making that deal to get Mo expelled. She Li tells Mo that after he's expelled he'll have to come work at the bar of She Li's father. Lil Mo seems resigned at the point to being permanently under She Li's influence until He Tian intervenes and saves Mo.
Now She Li can't get to his favorite toy and it's pissing him off.

Ch 16 Raw
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I wonder who opened the door, looked and ran off before Painter could see their face after Yoon molested him. Yoon would have seen their face. He was also facing the door.
He didn't seem to care at all. If it was Jiwa, I'd think Yoon would take a bigger interest. I don't see Teacher or Jiwa glancing and running away immediately.
I also don't think Yoon is done with the poor painter. At the end of 16 he is still holding the Painter. If his only goal was to give a handjob, he should have let go when he finished.
He's still wrapped around the Painter tightly in the last panel. Chapter 17 could be even wilder.

Here is how it plays out in my head
It is the Teacher and it was because Jiwha had everything planed before the sex session for the Teacher to catch them in the act (he had the whole noon to do it) ┑( ̄Д  ̄)┍ Teacher goes " you discuss me " look on Na-Kyum but before Na-kyum can break free to run to his teacher, Seung HORNY french kisses Na-kyum and lets him off to run crying to his idol FROLLO TRASH In-Hun. SuengHOE gives a monologue about "you live in my house now and you belong to me" (〜 ̄△ ̄)〜 Na-kyum cries out to his teacher for comfort, but the zealot victim blames him. (︶︿︶)=凸 Meanwhile Seung HORNIER relishes the feeling of caresses he did off Na-Kyum's body and goes in ecstasy dreaming of porking his uke hole and ends there temporally until the next chapter ╮( ̄▽ ̄)╭

I think the teacher or the servant.

It seems obvious what would happen next. Well, Yoon has made an exception to the "I won't do it with a peasant rule"
***
Amended "I won't sleep with a peasant rule" now includes an exception for "handjobs" and "licking".
Poor Painter just got sexually violated. Yoon is without question attracted to him. I think it was the teacher who saw. But why oh why would the teacher just happen to be walking by Yoon's bedroom at that moment?

Reading the story in English, I think what is implied about the Father is that he was lonely and jealous that he could not have a kin. In the chapter where he seduces Gunchan, in his thoughts he says, "You should be out of your mind by now".
He knew he liked Gunchan just like all vampires instinctively recognize potential kin. However, he got angry at Minhoon and Gunchan defying him so went ahead and bit Gunchan. He had no idea if it would drive Gunchan insane or not, but did so anyway.
It seems very implied that he did try to take kin like other vampires but they either died quickly or went insane. He stopped trying 500 years ago. Father is way too strong and being his kin seems to erode the sanity and physical health of any human he attempts to turn.
To his surprise (and delight), Gunchan kept his sanity. Now he likely wishes his dominance affected Gunchan a little (like assimilation), but it probably makes him want Gunchan more since Gunchan can defy Father.
Father might be the most powerful of the vampires, but the price seems to be an eternity alone since he likely couldn't keep his kin sane or alive for long (in vampire terms).
Once he realized he finally had a kin who could withstand a bond with him, he started softening his stance on Minhoon and his son and the whole system right away. Notice how it's even mentioned in that meeting they all have. Edric and Sungreul suspect that father is willing to go with Minhoon's terms mainly because of Gunchan.
Father is like, "Wait, I got a kin? I really get one I can keep? **ck all you bitches. Yeah, sure, Min. Have fun with the kin system. Later ~" *off to follow Gunchan around*
Basically, Father was bitter that everyone but him got a kin. So he made a system where no one got to enjoy having a kin. Now that he's got a kin. Everyone can have a kin after all.
He is never going to let Gunchan go. Gunchan seems rather chill about the whole affair. But don't underestimate him, he seems willing and happy to call out Father.

Maybe the real reason the Titan needs a human bride is the Titan is super-teeny tiny for his kind. It's massive to humans, but only a titan pinky in their world. Let's hope this for the MC's sake.

I don't think that's the case.
When they told him he couldn't marry, he was holding his bride and she was smaller than him.
Also, compared to how tall he is in comparison to the human and how tall the others are in comparison to the human, I think he's just about average, perhaps even on the tall side.
Can we talk about the painter? This kid is like genius level talent to paint so well with sumi-e or ink wash painting at such an early age. It is unbelievably hard technique to master well. Most have to go through years of training. You can't make a mistake or the painting is ruined. You can't erase or cover up things. But this kids paints complicated paintings perfectly from his head (he doesn't really need to be in the room for the whole orgy since it's already been established he can paint from memory or just by a few quick glances). It takes incredible concentration and this kid can do it even with an erection! Talk about keeping your focus!
No wonder the other nobles are so threatened by this kid. This kid is a monster talent. Step aside, davinci!
He had to have training from someone. Ink wash painters usually spend years just practicing the strokes and how to grind the inkstone. Only then do they actually start to produce work.
If this kid got professional training he'd no doubt be a legendary painter. If Yoon invested in this kids talent and got him some real training, the kid could make works that would easily refund whatever Yoon spent on him.
I think Yoon recognizes a talent. (And he is also wants to see if the kid is talented in other areas)
Kid is a artistic genius!
This comment was highly educational. :O Thank you. :P It would be great if the story would put emphasis on his talent. It would make it much less cliche and interesting.
Agree. Theres also how he started drawing sodomy young, with practice comes ease.
Makes you think how those art he published with a pseudonym were just doodles and now hes being commissioned, his real art style is coming through. And also how depraved was his environment for him to be so exposed to it at a young age. Im just grateful he was untouched by it seeing as hes so cute, maybe the drawing part became his pursuer's repellant? xD
Repellent indeed can paint sodomy whilst horny and was still a virgin until