Yes! -and no. Each girl will have their own intimate scenes where things get preeetttyy hot :p
As for the background, I see somebody was looking through the files ( T u T)
Every route taken throughout the duration of the game will have every girl present in the game, but some routes will present options to interact with the girls that others will not. So if you want to get those special scenes with every one of them, you'll just have to play through the game multiple times and figure out what options take you where!
(Or maybe I'll release a chart that explains how to change paths to different routes and whatnot) ((MAYBE))