LOL. I was planning out a massive "WTF IS WRONG WITH YOU" review but then it turns out he was just dreaming. Damn.
I guess a large part of this review was going to be commenting on your characters' OOC-ness but I can't really do that anymore...
Hopefully you'll have something to this story that sets it apart from all the other "R/Hr but Harry loves Hermione" stories that have been circulating on PK recently... I guess that's the real challenge to writing one of these.
There were a few places where the grammar was a little odd or the sentence structure was off (see third paragraph), but overall the syntax was pretty good.
Despite being a dream, I think this chapter did a pretty great job at developing dream-Harry and dream-Hermione and dream-Ron's characters -- I look forward to seeing how you portray real-life H/Hr/R.