I just wanna know, in the long run what do they gain from killing these people besides ‘...

Yea I def agree, they did not go through all this just for killing ppl they didn’t like?? I was expecting more seeing as how the manga was dragging on for a while…

so ppl also dont try to separate them ig?? idk its probably like getting rid of annoying flies to them, honestly flies are annoying so we get rid of them even if they dont necessarily harm us, just bother us and take small pieces of our food. same with those ppl, they are emotionally draining to jun, also dont treat him that well and the professor was trying to separate him from his boo (for his own well being) but they dont like that. plus their malice is already swallow them up, at this point their pure evil so im not surprise they just kill someone bc it annoys them or for their "paradise"

It wasn’t that many people trying to separate them to begin with, it was only the uke caregiver who got bad vibes and tried to separate them, besides him everyone else didn’t do much

Also jun is a passive person if he was bothered by those people I would him rather talk it rather than put out cigs on em and kill

not only the caregiver really, you could say his other friends were taking away his time from the seme (sorry I forgot his name) that also bothered the seme, even if they weren't actively trying to take him away, also jun was "nice", which isn't apparently even his real self according to the seme and the seme hated him acting like that. dude idk lol, what do you want??? like a really deep story, I mean its yaoi, I wasn't even expecting much to begin with. also their have been kids who kill their parents bc they dont approve of the significant other, its not rlly surprising that the seme wanted to kill the caregiver, also based on his past, he's not very mentally stable to begin with. also jun has never been a passive person imo, like the seme said, I felt he was holding himself back, him putting out a cig on someones forehead seems really small comparing to him and the seme killing the seems parent back then lol