With thanks to the commenter about -- love the prompt -- I would really love to see the reverse of it as well.

Reese does/says something that hurts Finch's feelings but doesn't even notice that Finch is hurt. Finch becomes distant (no more bantering with Reese...) but won't talk about it. How can Reese find out what's going on with Finch?

I'd really prefer slash though, tbh. :D