Taimanin Asagi

Taimanin Asagi is a spinoff of Dark Knight Ingrid. Same producer Pixy. 

Same director, the KING of Hentai in my mind. Both have gorgeous animation, both are quite hard core, both have tentacles, both are along the occult. 

Same animation style and camera work technique. 

- both mc's fight demons for the sake of humanity - both have organizations that specializes in killing demons - horror themed - both have a main villain that uses demons for their own benefit 

- both mc's fight demons for the sake of humanity - both mc's have siblings - both have organizations that specializes in killing demons - horror themed - both have a main villain that uses demons for their own benefit 

Crazy Ai started in 2003. I've been into tentacle hentai since before then and so I've seen it all as the years go by and I have to say at this point, even though I worship Inyouchuu above all, I think Ai and Asagi are comparable when it comes to the "intensity". Both come off as rather serious and with dark tones and the sex can be downright brutal at times. Ai set the standard for making stomach bulging / large insertions a tad bit more mainstream (thank you! ^_^), and did a bit with ahegao, both styles are definitely something you see in Asagi and a lot of newer monster/tentacle releases. If you really want to take it to the limits with tentacle intensity then these two are perfect. Topped off with amazing budgets, still some of the best looking h-anime out there by a long shot.  read more 

Similar plot in Taimanin Asagi and the last OVA of Seifuku Shojo. The art and lots of action are also very and very similar. Well, they both have the same director, and that is very noticeable.  

A blend of demon and experiments makes a great combo in these series. 'Taimanin Asagi' has very high quality scenes and colour which goes well in a dark vibe environment. 'Netorare Fighter Yaricchingu!" put its money on drugging that corrupt girls to the extent of risking losing their minds. Fighting is just an extra and not really concentrated on.  

In a world engulfed in darkness, demons desire all and perceives human as easy prey. Armed with deadly tentacles and capabilities beyond a human's physical limit, a pandemonium conclusion awaits those who do not obey. 'Pandra The Animation: Shiroki Yokubou Kuro no Kibou' centers itself more on a controlling point of view whereas 'Taimanin Asagi' converged in killing and pleasure.  

Similar art and both of them consist of pretty hardcore daemon/tentacle forced sex with some really epic POVs. Both of them has mind-break actions.  

They have very similar art style and are made from the same company.