Moreover - in my point of view the situation in temple wasn't so great for Flag, but for Eri (not much changed in Harima x Eri realationship, but Eri's feeling got... more serious).
1) As Harima said (and I can't argue with him about that) she said what she wanted and fell asleep in a minute - what kind of attitude is that
Girls, remember - if you want to use guy to do something, make it the way the guy feels like he was doing a favour ,but not like he was persuaded to do it (we hate being slaves - only S&M likes that).
2) "Hige, your the worst" - and that's the end of 'she is nice' mood
It's not like I don't like Eri, actually if I met her in real life I would became friends with her more easly than with Yakumo kind of girl (sometimes I feel awkward in front of a girl who barely can say a word).
and I prefer Eri's BGM music (Feel my fellings) than Yakumo's (Yugao)