The overall premise of the game of course is not original, but it's not to bad. It does suffer from an overall feeling of being cheap.
Renders 5/10 : Average renders, the characters are ok, the environment is rather cheap though.
Story 4/10 : Suffers from context problems, as well as being unimaginative and bland. Changing the relation to the characters also causes problems, it is not properly thought out.
Animations 1/10 : Cheap and poor animated 2 second loops, along with no feeling of actually having realistic sex. Of course this is so common with these story/games. Since the story is bland and the animations cheap, this story/game is not memorable. More effort into improving both would change that.
Playability 8/10 : Since there is no grind in the game to earn things, the playabilty is high.
Content 5/10 : Chapters are not really short, nor are they long so for the amount of time it has been out there is an ok amount of content.
Overall : Although not likely, a redo of the whole thing with much better and imaginative story, As well as improving the animations. Would make this a better story/game.
As it is, it is not something that grabs the players attention or is memorable. One playthrough and there is no real desire for more.