I'm not sure I agree with others who seem to be claiming this is the best storyline ever written in an adult VN. Yes it's good, but let's not get carried away. I'm not saying you shouldn't get this game, because you should, especially if you like extreme stuff, I'm just saying it's no Code Geass. Because while it is entertaining, and there are some cool twists, I'm very hesitant to call the storyline smart. I can't really go into detail without giving away spoilers, but in general a SMART storyline gives you a chance to guess the ending, and any twists along the way, before you reach it. Now there is one very cool twist which they do pretty well, in my opinion, and I guess lots of people would call it the main or at least most important one, but this barely makes up for all the other explanations for everything they give towards the end, of which there was absolutely no possibility of working out or even many hints and foreshadowing to notice the second time you play it.
Now I've been overly negative there with my main criticism so let me back up a little bit. This is the best adult VN I've ever played. Easily. Let's go into the usual categories...
Story & Writing: (8/10)
This story is really good, it's engaging and you want to understand everything that's going on, which makes you keep going. The final explanation is interesting and logical. Not smart, realistic (even if you assume the technology is possible) or guessable, but logical. The characters are all caricatures and one dimensional but still lovable and you're invested in at least some of them. 8 out of 10 is a really good score for an adult VN, because let's be honest it's not the main reason you're here, if it was you'd be reading Tolkein or Shakespeare or whatever you're into.
In classic Japanese fashion, the girls all commentate what's happening to them in high pitched voices during the H-scenes. Even the shy ones, and even when they're supposed to be experiencing something for the first time. I understand this is because it's a story and this helps immerse the player in the experience, but it's all the same and really tires me out when every single scene happens this way. Personally I think the shy people should stay shy and quiet even during sex.
Translation: (10/10)
Translation is perfect. Enough said.
Music: (9/10)
Music that exists is great but for such a long game it could have had a little more variety.
=Graphics: (7/10)
I'm not sure what you're expecting me to be able to tell you here, look at the preview art and as long as you like the style, you'll like the game. In terms of H-scenes, they have sufficient images for each scene but no animation or anything. Backgrounds are extremely repetitive, partly because so many rooms in the story are the same, i.e. four white walls.
Sex: (10/10)
Obviously this is personal opinion but they really push the boat out here and have a great mix of consensual and non-consensual scenes. If you don't like non-consensual stuff, this game is not for you.
Overall: (4.5/5)
If you can afford to, buy this game. It's one of a kind and should go down in history as one of the greats. It is a masterpiece but it's still an H-game, not an Oscar winning movie.