This is pornography.
That might sound confusing. Isn't everything on this site pornography? Well, yes and no. Every game we play has pornographic imagery, but some of them do more than that; some tell a story. Which is why I say this is pornography.
This is a classic incest visual novel, complete with all the tropes. Everyone wants your MC's dick right from the start; everyone is incredibly horny, all the time; there is zero build-up or characterization. But what makes it strange is that there's also a mafia story going on at the same time. The MC's dad is an undercover cop infiltrating the mob, and the MC is roped in to investigating another mobster. So there are aspirations, here. Just not with the actual sex parts of the story.
That might sound harsh, but let me give you an example: the second the MC meets his aunt (who hasn't seen him in 12 years, when he was a child) she immediately wants to fuck him. At the first meal with her, her hand is on his leg. He gets into her hot tub and she dry humps him in front of his mother. That evening, she tells him explicitly that she wants to play with him sexually. This is day one. Day one! There is no build-up, no character building, no relationship. There is no more story there than there is in the intro to a hardcore video. It's nothing.
The relationship with the MC's mother is, if anything, worse. After nothing more than a morning wood accident, suddenly they have these emergent feelings they have to deal with. What feelings? They haven't been flirting. They barely interact at all. Completely unbelievable. The story is just going through the barest motions to justify porn.
Now, all that said, this doesn't make the game bad. Not at all. It's decent pornography. If all you care about is having a quick wank to some implied but never fleshed-out incestuous relationships with decent renders, well, this is the game for you. But if you're looking for something more, if you want something deeper than the adult game equivalent of the classic porn opener "Did someone order a pizza with sausage?" then you should probably look elsewhere.