Extremely good game, and I managed to beat it without using the walkthrough.
However, I must confess the only reason I took off half a star is because it contains the wrong type of difficulty. Getting the initial door open took a few tries because there was no indication that I had to wait after moderately arousing him. The same goes for getting the key off the masked woman, but worse because you had to try prying it off twice, fail, wait, arouse her 6 times with intermittent waiting, THEN pry it off. And the only hint for all this is "If only she loosened her grip." That isn't good challenge, that's old school graphic adventure "Try everything until something works" logic.
However, allow me to explain where the 4 1/2 stars came from instead of pointing out why it lost half a star. The writing was blessed with very few spelling and grammar errors (A must have for a narrative focused game) and was gorgeously detailed. Despite showing little to no actual sex scenes, I had enough written detail that it wasn't actually needed. The art is pleasing, if basic, and the sound was just fine. None of it sounded like jelly sloshing in my ears, which is a huge plus for this genre.
Overall: Very good game, but please add in some more hints. Maybe make some of the characters provide hints if you talk to them multiple times. SOMETHING that maybe won't turn people away. I almost gave up at the first puzzle, but managed to figure it out just before I clicked off the page. Aside from those two headaches though, no real complaints. I don't even mind that when moving around you're just a flashing square, even though an actual visual would be nice.