I would say that 80% of the story would be different. I'm pretty sure that I've told this before, but I did a total remake to every part of the game. Especially the story because that's one thing that I really want to remake. And yes, you really don't have to worry much about the story because I do already have a plan until the end of the game. It's not a detailed planning but more like a line of dots. I know how its gonna develop, and how it's gonna ends. Though, since I'm planning for a multiple route, this will also mean a multiple ending.
I'm just gonna say this, but my previous story script that you've played before is basically trash lol xD. I mean, at the time I know nothing about how to write a story. Even I struggle to write normal chat in English back then. Back then the story has no plot, no emotion, and just generic AVN storyline lol xD.
But it would be different this time. I already planned everything and I know where I should bring the story to. Even from the start(The first release) you will see that there's a thick plot in place. But I have to warn you, my story might felt a bit different from others. In this remake, I want to focus on the Mafia LIFE, Emotions, and Drama. The tone will be a bit darker, and I think it's normal since this is a MAFIA THEMED game.
Also, the main focus of the game is YOU and your LIFE as the Main Character and NOT the Love Interest. So if you're hoping for a game where the MC spends his time with Love Interest A and then spend some time with LI B, then have a date with LI C and repeat, then this game is not for you because I'm not gonna do that. Every scene that I add into this game is for the sake of the main plot of the game. And it will be a while until you see all the Main LI's inside this game as well.
So, does that mean that this is a slow burn game? Again, it depends on your definition of your slow burn. If you think slow burn = holding sex with a love interest until a certain amount of time, then NO this is not a slow-burn game. The only reason why this first release don't have any lewd scene is because I overdid the prologue xD.
I'm gonna stop talking here before I spill too much and I don't want to raise your expectation too high as well xD. I myself still on learning how to write a good story efficiently. Just like the other aspects, I'm still learning and will keep improving my skills in each update. I might make some mistakes along the way, especially since I'm planning for a multiple route game. So yeah, bear with me throughout this journey I guess

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Oh, I am glad to see what you're describing and to hear that you've got it planned out (if you said that before, I must have forgotten, sorry. Just had a lot of stuff happen personally irl this year).
And yes, the story should be about MC's life as a Mafia boss (previous iteration of the game had MC be the heir of the Mafia boss; I'm guessing that setting will remain even in the remake?), and LIs while supporting and having their roles, should not try to take over the story.
Story should be all about the MC.
What I would be genuinely curious about is given the setting is about Mafia, whether there will be the following;
- Will there be multiple Families? For e.g. Like the known 5 major Crime Families in New York irl back in the 1930s (Bonanno, Colombo, Gambino, Genovese, and Lucchese), or like the 5 Crime Families in fiction such as The Godfather (Corleone, Tattaglia, Barzini, Cuneo, and Stracci)?
Not sure what you have planned, but I just find the more Crime Families there are the potential is all the more greater since there would be more conflicts.
- Given this is Mafia life, conflict and war between the Families would be pretty darn cool to see.
This would also include Dons or Donnas ordering assassins to do hits on certain individuals.
- I'm hoping there is a bit of Mafia politics also - given there is war and conflicts, there would also be on the flip side parley/ceasefire & also alliance.
Also, how these Mafia bosses (Dons [male] or Donna[female]) influence actual government politicians etc through bribery etc.
- I'd also kind of hope there would be a lot intrigue and behind the scenes backstabbing between the Families to gain the upper hand over one another.
- How there could be traitors within the Families, and how each Family deals with the traitors when they are found out.
- Following is a typical Mafia Family structure.
Given MC is the Underboss & heir, I'm hoping MC interacts also with others in the hierarchy.
Will Della be a Caporegime (aka Capo), or will she be a soldier?
Gonna be interesting to know which rank each character in MC's family will be in.
Now, I'm not saying you necessarily have to do all the above.
But I guess above is a small list of what I think could really draw me into the story and characters with the world and characters (so if you can manage them all, .
The life of Mafia and how MC navigates within that dark underworld.
There's just a lot of potential, & I'm looking forward to how it all turns out.