I'll start off by saying this anime is targeted toward a pretty niche audience. It contains a variety of fetishes including drugging, necrophilia, some enema play, bondage, rape, quite a bit of cum, guro, and a bit of inflation as well. While the show does touch on a number of these things, there is a focus on the necrophilia aspect which makes it a must see for those with that inclination. It's definitely at the forefront of its kind in that respect. Animation I felt that the animation here was pretty average or slightly above. I wish it could have been better, but at the sametime nothing really got on my nerves.

Sound
I was pleasantly surprised by the music. The OP has a somewhat haunting feel to it that really sets the mood considering the show's content. I think the music did a good job adding weight to the story's atmosphere, intensity, and unpleasantness at the proper times.

Characters
There was a decent assortment of characters here: the somewhat average guy who is a bit hesitant about his new job washing corpses, the seemingly detached guy who works too many nightshifts, the nympho doctor, the cheery and somewhat cute romantic interest, the cute and willing nurse, and then another nurse who is a bit of a mixed bag.

I liked following the protagonist in episode 1 as he struggled to get accustomed to his new job and come to terms with the strange things in his head. He devolves to quite the monster in very little time and is pretty enjoyable to watch. Unfortunately none of the characters really left their mark on me, but I feel they served their purpose. The real treat of this anime is the content.

Story
I watched this RAW, so I may have missed out on some of the finer points, but I felt that I could follow things pretty easily. The plot setup is pretty simple: a young guy gets a job cleaning up corpses in a hospital and unwittingly becomes a doctor's guinea pig as she develops a kind of hallucinogenic sex drug. The stage is then set for a sexual rampage with some pretty trippy (and disturbing) hallucinations as icing on the cake.

Enjoyment
I'm a fan of depravity and this anime delivered. I thoroughly enjoyed the hallucinations and the very very disturbing content found during some of the sex scenes. I was also treated to one of the most magnificent anal rape scenes ever. It reminded me of Dragon Ball Z when a guy is screaming and powering up, except this was an orgasm. The music really tipped the balance and I think this scene in particular is among my favorite choreographed sequences in animation right up there with the frog dissection scene from Ichi the Killer: Episode 0. Toward the end of episode 3, I was feeling quite pleased and just a bit unsettled, which is usually the sign of a good show ^_^

For fans of guro and necrophilia this is truly a gem of a hentai and a favorite of mine within the genre.