as someone who read the novel, tbh You're absolutely wrong and off the mark about Yohan and his love for Jun, why he approached him... etc
This author loves toying with readers and absolutely utilising the 'unreliable narrator' just like what's happening with this chapter's plottwist, Jun carries on thinking he knows it all through calculations at every corner but ends up each time realizing his calculations were already misled with a small part of the picture
that's why this work is honestly one of a kind

You can likely find my comment back than I said “yohan never liked jun and was only playing with him. He saw jun helplessly in love and devoted. To that other guy he so he got curious about jun thinking if he follows this guy around so blindly even when he’s being treated like trash, why can’t I do the same to him?” I figured it out from than on he wanted to get closer to Jun and make him fall for him just bc he can. Yohan didn’t like the kid but the more he spend with him over summer the more he actually started to fall for him, and his plan started to backfire. Jun fell for yohan. But yohan was too deep in his manipulative plan, he couldn’t back out of it. When he saw he was losing Jun bc Jun was starting to figure it out he started to bully him. In my theory yohan just wanted someone to give him their full attention because he never really had it even though he was the favorite. He doesn’t know how to love bc he’s mentally messed up and can’t control his emotions. Jun was the perfect target. Yohan is really gay and open about it to some people but pass it off as a Joke and jun is closer gay and hypocritica to everyone. They are a perfect match of dumbasses who keeps toying with each other bc they both like each other but complicate it.