I DONT THINK I WAS SUPPOSED TO PLAY THIS FIRST
You were supposed to play it last, actually. Find the playing order on Fouzi's main page.
You'll have to pay and buy all the games because you won't find the full story in web demos. ($ 23 and a great story, buy the bundle whenever it's available or the Happiness forever set, and Legacy separately, and don't worry if Legacy is on Stranger girl's page, it's part of the main story)