Just keep playing. Give it a week or two (in game) until kitty pops up in the square. Emma will follow after when you go to class.
If you mean if it's okay to have a relationship with both her and Kitty, make Kitty your GF first, then hang out with Rogue until the point where she wants to be your GF. You should have an option where you can tell her you're with Kitty already, and from there pray that your relationship is strong enough for her to say yes. I think. Anyone can correct and flame me if I'm wrong since I just always go for Emma and then anyone else I fancy ;P
I personally did it the other way around. Got to a point with Rogue where she was cool with bringing Kitty into the equation
Whichever way you go, it should just pop up when either girl calls you out into their room. After that, it should just happen naturally as long as the game doesn't crash or something.
It's less that you need a walkthrough, and more of just poking and prodding to get different results. Nothing is extremely hard to reveal, unless you're really stuck with Emma, and there are plenty of posts before this page that probably has one or two posts that contain something you may be looking for.
I think the one scene is all there is. At least the changelog speaks about an "intro/cameo".
Yes.
Read through this thread:
