Hentai is not like celebs. It just cost WAY MORE to get a hentai movie licensed than porn. There are many companies that have licensed hentai movies. If you somehow use it on you're site and they find out, then they immediately send DMCA's and shit.
Criticalmass is one company that owns a lot of licensed H movies.
http://www.criticalmassvideo.com/cat...x.shtml?page01
Small guys go under the radar but if you become big then you get in trobble.