Angel of Darkness is a good decent hentai, don't get me wrong, but we don't wanna see another hentai with the same plot in almost EVERY episode, despite it being 25 years ago since the hentai came out. I feel that 4 episodes of this hentai is so unnecessary. They should've did only one episode about Mr. Shigimoto and his crazy lab (the cover on the DVD)
Story: 7/10 - The story itself has a good plot and everything, like supernatural plants raping a bunch of high school girls and a antidote being found but it gets more and more boring in each episode (I'll talk
about it in the enjoyment section).
Art: 9/10 - Despite it being animated around the 90's, the art is still good no matter what. Sometimes the characters look creepy and stuff, but it's anime.
Sound: 8/10 - Most of the sound effects from Bride of Darkness are in this hentai too so it has it's resemblance but the sound is good.
Characters: 4/10 - There isn't that much details about each characters but they feel all the same in each episode, like them being a student/teacher.
Enjoyment: 4/10 - If you like to watch 40-mins of Angel of Darkness of the same ass plot shown over and over again in each episode, then this hentai is for you. The episodes get more and more boring and less enjoyable as you waste 42 mins of your valuable time watching it. Plus the sex scenes get more boring too.
Overall: 5/10 - If you wanna see a good hentai better than this, watch Bride of Darkness.