Wow, a 2003 hentai animation with better production value than most hentai being pumped nowadays? That is indeed a very rare hidden gem! Only that... this hentai is indeed hidden, but not a gem. To be more accurate, in my mind, it was supposed to be a very good hentai with a decent story: a professor being blackmailed by a superior to rape some girls—that's it. Everything should end there. However, the second episode destroys a good exposition with a sorry attempt to "deepen" the story. However, I shall give the anime's apparent "twist" the benefit of being logical—logical but nonetheless unnecessary and destroys story immersion.
I particularly do not mind the art of 2003 animation—like what I said earlier, it has the potential to be a hidden gem if not for its excuse of a "story." I repeat, it is a 2003 hentai animation with better production value than most hentai being pumped nowadays. That potential stems from the art—but to be perfectly honest, the art style also did some damage to its overall quality which makes it not as good as it can be.
I can't really comment on the sounds since it's mediocre enough and unnoticeable. As for the character, the professor—our MC—caught my attention. He gave off the impression that despite being able to rape many cute girls—he still abides by some sort of morals, which makes him NOT heartless, and is a very rare personality among MCs in rape hentai—unlike most who are hungry rapists. This makes him as unique as he can be. Nevertheless, the horrendousness of the other characters greatly outweighs his likeability, making this part of the show still as dreadful.
Because of all these, all of my stock enjoyment from thinking about discovering a potential hidden gem quickly diminished. The anime wasn't scary, but I did cringe from both disapproval and horror.
Where's the horror tag?
