Tokubetsu Jugyou 3 is a hentai animated by Murakami Teruaki. This should say it all, because if you've ever seen any of his work, he has a very distinct style, that emphasizes h scenes, and facial expressions. Tokubetsu Jugyou 3 is no different, it's handled much like every other OVA done by Teruaki. The style is done is the selling point, it has a very niche audience, and would scare away many people looking for a vanilla hentai. But What it does, and what it provides, it does it damn well, with lengthy scenes of sex.The voicework makes the scene very immersive, and
generally enjoyable. In addition like most hentai's tokubetsu dosn't have a story worth talking about, but just a compilation of sex scenes, which isn't bad since it's a hentai. If you're a fan of more hardcore hentai this is the one for you, it sticks with Teruaki's formula, but if it isn't broken don't fix it.
TL;DR:Tokubetsu Jugyou 3 is an excellent hentai animated by Murakami Teruaki, and should be watched if you've liked any of his other works.