The game is well made, with a good premise and a reasonably convincing story. It's art style is great, and there are several good scenes.
However, I found the scene progression repetitive, the combat annoying and intrusive, and a drop off in quality of scenes. There were several in the first zone, a similar amount in the second, but then the 3rd and 4th dropped off significantly. The 4th zone had a lot of potential, but was overshadowed by the previous zones. Instead of increasing in level of eroticism, it instead seemed to dial back and even used characters other than the main character in scenes. It was as if the scenes were thrown in as an afterthought.
On top of that, getting all the scenes is a struggle, as it's difficult to know what to do to get them. I gave up on getting them all, as I had already beaten the game and felt it was too much of a chore to try and go back to find them all.
TL;DR it's got great art and decent story, but is held back by its repetitive scenes and questionable replayability