I just finished this and since there really isn't a review for this I thought I should point out there is a lot more sexual content than I was expecting based just off what people said in the thread earlier. Incase anyone is back searching information on this anime, I would definitely rate this in the 18-21 area.
Like was said before there is hardly any flat out nudity, but there is a lot of strategically covered nudity. That stuff didn't bother me though. What did get me a little uneasy was the many attempted rapes and groping. And then a woman is tied up and tortured while half naked by the guy who just raped her earlier. There are at least 4-5 intended/attempted rapes (lots groping, ripping open shirts, screaming, moaning and crude talk going on during these as well), a short scene of two people having sex in a flashback and then a much longer rape/sex scene near the end (again nothing shown but still it's quite disturbing...). Also, while this wasn't a big deal to me, one woman does take off her top to fight and they don't bother covering anything during this part but its completely non-sexual. I guess she lost her all purpose sash the first time she fought
Overall I enjoyed the series well enough but I was really put off by the amount of times that stuff happened.