After reading the description of the game, I was anticipating a new take on NTR, involving uncovering details about the heroine's lewd past. However, it's not quite like that; you only witness three scenes from the past, all thematically similar.
The game itself is your typical clueless boy vs sex god NTR, and even that isn't done all that great.
Story is ok-ish, but with a few plot holes.
Considering these shortcomings, I would rate it a 2-star; however, I won't deny that objectively, the game exhibits good quality and interesting mechanics. Therefore, I'll give it a 3-star.
Overall, it was an immense disappointment.