Don't bother with the game. The game play is you just running around trying to find events, finding out that you don't have the required "Stats" or previous required item, scene, etc unlocked. To raise stats you need to do scenes. There are about 7 endings and the variation on CG's for a set is almost non-existent for the majority of them. The endings let you restart from the point before and farm for more points to put into the stats for scenes. They also are mostly around 3-5 cg's. I wish I was exaggerating when I said there's barely any real penetration in this game...
To each their own, but hours in this game for what we got isn't worth it. Just unlock the gallery and get it over with...