In a parallel universe to the one we know, All for One didn't fight All Might at the same time he did before canon and this makes all the difference. (THIS STORY IS ON INDEFINITE HIATUS. LONG STORY SHORT, AUTHOR BECAME MORE INVESTED IN OTHER IDEAS. FEEL FREE TO STEAL ANY IDEAS YOU LIKE FROM STORY. APOLOGIZE FOR THE INCONVENIENCE)

Izuku was born quirkless, in a world of superheroes. Berated by his so called friend. "Pitied" by those he loves. With a secret most dangerous to the world, he would become the greatest hero alive, if he control the rage within.