Ngl if I was Garam and my ex lover did this to me, I’d probably never go back to them, realistically. If we’re speaking in objective terms, like you said, a lot of what he’s doing is harassment, public disturbance (annoying and raising a fuss for other students in the class aka a public setting), and stalking (following him to his new home location and staying there too). Since we know his intentions/thoughts we can understand his frustration, but irl this would scare and frustrate me if I was in Garam’s position
Right, that's exactly it! The only redeeming thing about this is we know Jaehyuk doesn't have sinister intentions for the most part, but he shows such a fundamental lack of respect for Garam's boundaries that it honestly wouldn't matter to me too much. He even admits to himself he's not even doing it because he's angry anymore but because it's funny, and I'm not sure what's worse.
I know Garam still likes him, but for me this would be the nail in the coffin.
Jaehyuk is actually unhinged tbh, not just for being an absolute menace when they're at school and potentially putting Garam in danger of being outed, but also for becoming Garam's neighbour when Garam specifically moved out to have space away from Jaehyuk to think.
I'm not saying Garam hasn't also fucked up, but man. Genuinely wtf. I know this is probably the turning point for them because now Jaehyuk is going to see just how stressed Garam is, but this is so uncomfy to watch.