The beginning of this episode with the over-dramatic rain and talk by Ayase makes me think that maybe it was a parody of sorts. I mean, School Days (as did other anime and games) made a cameo appearance
Although Ayase did come off a bit stubborn, I still think she's not as annoying as some make her out to be. Kirino on the other hand seems to be progressing well after the first 4 episodes, loving her development so far
I've seen a lot of people taking Kirino's behavior just a little too seriously here, it should be taken as comedy for the most part (I.e. - Aside from the revelation that Kyousuke has been ignoring her for the majority of her life.)
I can't wait to see more Kyousuke x Kirino development myself
Although the whole cast is pretty fun, I'm definitely enjoying this series.