I'm giving it a shot right now.
I'd say it's ok so far, maybe a 7 or 8/10
nothing that special besides the engine, gfx, and general GUI.
I't better than other similiar games. I'd defiitely would be interested if the devs decided to make another one with original art.
^I'm personally not fond of the whole "classic/contemporary" hentai art-style.
Although, I'm gonna take a moment to talk about the cheats and the menus. Seriously, more h-games should implement these sort of stuff, really the cheats make the game to be much more suited to your pesonal tastes and don't seem to hard to unlock (my guess is you just have to playthrough and get different endings to unlock all of them).
There's a small nitpick that I have with the menus tho, the lack of a "back" function, something that I think is essential in any VN-like game. Other than that I'm actually impressed that the bar is set so low (on the GUI) for non-studio and renpy VN games.
Story-wise I couldn't care less since, as I said, the art-style doesn't do it for me. For anyone else looking for a CG compilation VN type of game this could be gold probably.