I tried the game a bit but its not my type of game. This is why:
There is not enough built-up and too many sex scenes and too soon. Personally I can't stand the characters. The girlfriend of the daugther is an asshole, i can't understand what Amelia has for her, and Amelia herself is 18 and the biggest slut in the universe. That doesn't seem so realistic or appealing to me. Aside of lewd and naughty talk there is almost non other "story". Yeah a bit is there, but its not enough to get me engaged and the over the top and too frequent sex and lewd scenes is a turn off to me. I need more built-up and writing which is non-sex related to get interested. TLDR the biggest problem there do not seem to be a built-up. Not sure if i phrased that all correctly, but that are my thoughts. Sorry to say it that harsh, but when I want sex scenes after sex scenes after sex scenes with almost non story, then I'd just watch a porn and not playing a Visual Novel. Oh and i felt like watching instead of getting engaged, because there are quasi non choises.
But the quality itself is good, despite not my cup of tea (because of story, writing, plot, lack of choises) I won't rate it. That would be like rating a RPG or RTS game when I prefer First person shooters, and that would be not fair then.