Jun doesn't really need fixing, he's just severely lacking in any kind of affection and held onto Saki unconsciously because of that, he's still a kind sensible boy who's being(presumably)very masterfully manipulated by a grown woman.
But Riko came through this chapter ngl, she's hella cute.
I thought he would be annoying at first honestly, caught up with novel and easy to say he's my favorite in the club. I like the fact that they didn't make him a total degenerate, just a massive nerd and weeb.
Well shit, being stuck up there gotta make you pretty nutty at some point, loneliness is actually hella scary, not saying it was right, but understandable.