Shinseiki Inma Seiden

both animes have a dark horror theme that take place at school 

If you want some good tentacle based hentai that isn't totally predictable, both Sexy Magical Girl Ai and Inma Seiden are highly recommended. They share a lot of elements with the school girls theme, lots of magic and fantasy, all topped off with plots that are actually pretty interesting. Another great thing is both series are longer than your normal hentai titles, Ai hits 5 episodes with Seiden reaching 6. Chances are if you've seen Ai first and didn't mind the extreme tentacle scenes you probably won't have an issue with Seiden's sexual content, it's pretty hardcore but not Ai-hardcore. Inma Seiden is a definite classic and I'm sure Ai will be considered one in the near future! read more