This is a very interest concept for a game! I know this game has being a reference in the world of the visual novels and i can see why! I`ll admit  the story telling its not the best i have seen, because of it, i usually ignored the secondary character because of their boring and plain development for example...but otherwhise, the principal story telling its pretty well. 
I personally purchase the NSFW version and was very pleased with it hehe...Anyways i look forward for the next days!