If you enjoy the game, please accept it for what it is instead of trying to turn it into a completely different game.
You can always write fanfiction if you want to explore your own version of the story. But every extra branch multiplies the amount of writing, CGs, coding, testing, and consistency checks needed. For a solo developer, that kind of scope creep is a death sentence unless you want the game to be finished in 2077.
And no, “just use AI” is not a magic solution. Please don’t go there.