It's funny how Yuu is so social that despite considering Rin a loser and regularly being angry at him, she still actually enjoys having him freeloading at her house, as it gives her an opportunity to talk about Nana (and some other things). I might have said it before, but probably that sentiment will change when she wants to get more intimate with Nana, thus needing more privacy. When she should have her whole own house just for that, but there's actually a dude living there, it would be intolerable at that point.