It's literally Honey Select 2 but with Koikatsu-ish character style.
It offers neither the amount of content that both those games do, even without taking mods into account, nor even the visual quality of Koikatsu for the models (in my opinion).
At least there's default translation which is nice, I guess. Not that it was super needed for the previous games anyway, MTL did the job.
There's a decent number of positions, the character creation is as you would expect coming from the other games, just lacking in clothing, hairstyles and the likes, but there's still enough options to create nice and diverse characters if you're willing to spend time in it.
As I said at first, it's literally Honey Select 2, so there's no real setting, no plot, nothing. Make characters, fuck them to gain points to unlock more options (like threesome) and that's it. (I'm not even sure you can fuck the waitress in this one, didn't bother to try and unlock it)
I'll give it 3 stars, there's nothing inherently bad with it, but it's lacking, feel uninspired when compared to what has been done before. Even if Illusion works have been pretty repetitive over the years, at least they all had something, even if minor (the adjective, not the noun...), to make them a bit different that their brothers. Sexy Beach had its beach setting, PlayHome had the netori and corruption aspect to it, Koikatsu had the school setting, hell even Room Girl had an interesting (but badly executed) work relations setting.
Here, there's nothing, it's just Honey Select 2, but with less. Well to be fair this one actually runs pretty well, so there's at least one thing it does better.