basically he just wants to cling to someone who is clingy and he is jealous because sir nanjo is clinging to someone who is "not worth it" and in his jealousy he sabotage this for good but he know what he did is not right and now he is having guilty conscience and believes he might not be worthy as well cuz since he was born people told him, he was good but not good enough that people fight for him to stay to the point of losing themselves like how nanjo is losing himself just to be with the selfish uke.
I don’t think Mok-yeon felt guilty for sabotaging Nanjo and the other guy. I think he simply wanted Nanjo for himself but Nanjo is all caught up with the other guy ( let’s call him N, since i forgot his name) that’s why he got sad and gloomy because Nanjo is not explicitly choosing Mok-yeon (Literally why Mok-yeob asks Nanjo about N all the time and use N as his weapon to take advantage of Nanjo). That’s why he told himself “You’re finally all mine” something along the lines of the quote above on Chap 30, I think. In my opinion, he simply got way ahead of his feelings because this is his first time actually “liking” someone. I would agree though that maybe he feels of wanting Nanjo because his trauma of not being chosen for long term (from him getting in and out of foster home) and the desire Nanjo of wanting N for himself despite of how much he had to sacrifice just to protect N or some sort (Even if he ended up opening his legs for Mok-yeon, as long as he could have N for himself) I think Mok-yeon wants to be the person Nanjo glorifies or some sort, like he wants to be finally chosen or wanted by someone that their willing to sacrifice anything to keep them by their side. I can see his trauma projecting on that part but nonetheless I still do believe his ways were and still are unhinge.
i didn't say he is feeling guilty for sabotaging the relationship...
Yeah, I meant like he is did not feel antsy or remorse from what he did rather (going behind N’s back), he feels sad and all gloomy because Nanjo keeps choosing N nonetheless of how extreme his games were. I think he is jealous of that affection that Nanjo is giving to N, but he can’t get it that’s why he didn’t get guilty conscience because he does not believe he did something since in the very first place he was obsess with Nanjo and wanted him all for himself. That’s why he deliberately exposed their relationship to N on Chap 30, resulting to N walking out and Mok-yeon saying “Finally you’re all mine” something like that. (I’m trying to explain my understanding from what I read)
I’m honestly disappointed with this. The people in the comments glazed it way too much. I thought I would feel bad and understand him and his actions but it turns out I’m left confused of how his abandonment issues relates with him getting obsessed with Nanjo and ultimately. Still, I’m quite curious how this will go for them.