This game is very good.
It has a good story and plot progression, that keeps you interested. It has great renders and animations. Honestly the grind aspects of the game are fine to me, it really isn't that grindy and you can always use the tips built in the game to help you progress faster. As far as rpgmaker games go, this is a very well crafted one.
The main bad thing about this game to me is the character writing, especially the MC. This MC is just a douchebag, it's almost impossible to like this guy, he makes the dumbest and most cringeworthy decisions you could imagine. Sometimes the things he says are downright pathetic.
It's a real shame, because the story is interesting, the girls are amazing, but the shit MC character just makes this game not a 5 star game to me. I wish you had some freedom in molding his personality, or at least that he had a more neutral approach, instead of being a dickhead. I mean, seriously, "selling the serum"? Really? After everything that happened, THAT is what the MC thinks about?
Another thing I didn't like was the "speech" voice acting, because none of them matched the characters to me. It all seemed weird and out of character, almost as if every time you choose a scene, you're in a different reality than the one you were in the game. Very weird.
The voices during sex are perfect though, it's just when the women speak that it really annoys me.
Anyway, I still recommend this game, but this is my opinion on it. It's good and worth playing once.