Similar to other reviews, this is indeed a short, well made ntr H-game.
Yes, there are not many H scence variation, with no animation and voice. The dev still try to make it up by having good art for the fmc and making the character more expressive instead.
For the sex scene, it is only one scene that you see in the preveiw with different in dialoguses.
It's short, simple, and straightforward. Treat it like a doujin that you gotta repetitively click through to get to the H, I guess.
If there are more variations, then, it could get better, but, for what it offer, I guess it's gonna be a 3/5 at most