Now I'm sure of it, Hayasaka has a thing for her young master Ono. Too bad he's still pretty uncultured. Michinaga and Hochira don't even look like they're classmates, let alone the same age... but I don't remember Hochira being this short.
Tatsuki's doing better than a lot of romcom protags, and all he needed was one push to invite his crush to go boating with him. And he actually even noticed she didn't want to be seen with her head uncovered. I don't think "insensitive bastard" is a label I'll ever use to describe him.