Front Innocent: Mou Hitotsu no Lady Innocent

Beautiful art and consistent, good animation. Is it just that?

It doesn't matter if it's hentai, it should be minimally well written, and this one isn't. The "story" is extremely vague and explores nothing. The characters only have a brief flashback that doesn't say much for narrative, as the anime doesn't even have time for that. This hentai is much more concerned with good animation than the story. I believe it would take at least 3 episodes to develop everything that was shown in a lazy way - an example is the final stretch where a guy appears out of nowhere and says that the other ... must accept whatever (which is not even mentioned), then nothing one of the maids appears being abused and ends up (yes, there's no end to that crap). I believe it didn't sell well to make a sequel, so everything ends out of nowhere.

This hentai is just that, beautiful art and good animation. It's just that. In the end it doesn't give you anything else, which is disappointing.
Beautiful art doesn't make a good story.
This is one of the most visually beautiful hentai, but it's also one of the worst ever made.