Geez, I really want to like this game. I like the design and variety of the girls, and the animations are well above average. But man, the grind is ridiculous. I'm not opposed to a little grind in a game, but this is way too much. The individual scenes that you do unlock aren't substantial enough to really get off to, which wouldn't be an issue if you could just continue playing to get to another scene. Unfortunately, the grind is so convoluted it takes forever to get to the next short scene. I've been playing this a little bit here and there and I've just barely started unlocking scenes with the mother, with only slight progress with the sisters and teacher.
This game desperately needs to be better balanced, but unfortunately, I think it's probably too far along in it's development to make the substantial changes it needs. Unless you have several-hour chunks of time to devote to this, I don't currently think it's worth the time for fapping.