Yeah, this game makes into the "masterpiece" list I have in my head. Story, characters, and even gameplay to some extent, it has all well put together into a cohesive structure that suspends disbelief and messes with your emotions, from the beginning until the end. And if by any chance you have a taste in any way close to me, it might as well mess with your heart, as you see yourself being corrupted together with the MC. I'm sure you'll love the main antagonist.
On the other hand, we don't have anything endearing about the male antagonist. That's one bad point about the game. I don't remember that little thing's name, so if you're the type who enjoys a more fleshed out "bull" for the main FMC, you may find yourself disappointed.
It's also slightly disappointing that Kotori didn't get much involvement and if I'm not mistaken, there isn't a single H-scene between her and the MC. I can see some of you sighing that they did the "best girl"(Kurone actually) dirty. She's quite endearing after all
Some characters from previous games make an appearance, but as it is to be expected it's not the main focus here. Not much eye candy associated with it too.
I'm surprised that the side characters got some fleshing out, but don't expect too much. Still, you'll enjoy some bits here and there.
And the main character. People have already talked but this, but I think that his biggest shining point is not in how he grows as a character throughout the game, but in how he stays consistent and true to his character(forget the paradise ending. Pretend it doesn't exist). From the beginning until the end, Leo is the same Leo and I never saw him do anything that felt out of character. This is so rare nowadays for main characters that I feel like crying tears of joy.
H scenes are not much, but the little there is has a ton of build-up and the build up is GOOD. I assure you. I've seen games with better art be way less exciting than this one. You won't be disappointed.
Some of the other bad points already walked through down here, like the fact your choices feel quite meaningless in the beginning, because you can just branch it out whichever way later.