Bah, seems more like a demo/prologue/intro to another game.
Btw, you might want to sleep twice before finishing the wind floor, and go back into the shop after visiting the store again -- Won't be able to go to bed w/o progressing the story after it. Made me missed out of seeing those two events because I progressed too quickly, so couldn't get the last achieve -.-
Ps. Recollection Room, once unlocked, shows basically all the scenes, besides some stills. No real point playing it after, plus you only have sexy time with one of the girls, out of the introduced four.
Ps2. Save for y'all, if you don't want to bother with playing the game at all.