Do you think I'll miss anything related to her by skipping the others?


I would say probably not.

Looks like the girl's stories will go like this:

Kazuha route : Ep 1,2,3,4
Akira Route : Ep 1,2,5,6
Nao Route : Ep 1,7,8,9
Sora Route : Ep 1,7,10,11,12

I really wish they hadn't animated this the way they did. It makes it difficult or impossible for a lot of people to watch and enjoy it. Oh well. If they integrate the characters stories, some of the gamers get upset. If they go the ominibus format, most of the non-gamers don't like it.

Yeah, you can wait until episode 7 I think. I don't even know who Nao is. Who is that?