Rape! Rape! Rape!, there is no other name that can suit as perfect as this. The anime is just like this: Rape, then rape, then more rape, and rape, and rape. Story: 2/10 Well, when I saw the very beginning, I thought that maybe they would do some background story with a little mystery not revealing the rapist. I was wrong. The story is just a rapist raping a bunch of random girls (and one pregnat woman), and there is nothing more. N-O-T-H-I-N-G. Hentai doesn't usually have a decent plot, but this one is very very bad. The worst part is that they could do abetter anime with the "plot" that they have.
And the ending is just terrible.

Art/Sound: 7/10 - 5/10
The art of the anime is the best part of it. It's very "ok" I guess, but not something impressive. The design of the characters (raped girls) is very common, just one or two girls whose they used a bit more variety. The sound is normal, not bad but not good, so, nothing to complain about.

Character: 2/10
The only recurring character is the rapist. I think that the only other character that I can remember after finishing the anime is Miruku (The pink haired girl who is a superstar), the others have nothing special. Bad.

Enjoyment: 4/10
The anime is terrible. The first two episodes were disgusting for me. I don't even know how someone can "like" seeing a lot of girls being raped in a very brutal way. There are some girls who I just needed to hold my hand to not skip the scene. And most of the girls were virgins, so, virgins = blood, lots of blood.
The third episode is a bit better. It isn't that brutal, and has some enjoyable scenes, yet, the anime continues terrible.

Overall: 5/10
The anime is mediocre, but I dare to say that worse hentais exist. Watch it if you want to see brutal rape with blood and girls screaming.