Backstory time

Four boys tied together in their hatred of heroes.
Midoriya Izuku, son of All for one, grew up in the life of being a villain.
Denki Kaminari, accidentally killed his parents at one year old when his quirk went off and he was saved by Kurogiri.
Eijiro Kirishima, tossed aside, at five years old, when his quirk damaged his body and parents didn't want to pay the bills to heal him. Kurogiri saved him too.
Cyrus Killian, son of America's number one hero, Toy Machine, and villain, Grimm Queen. Both parents got killed by American heroes. Leaves to Japan to protect himself.
The four boys found their targets in UA and no hero can stop them.

POVs will mostly be Cyrus with hints of the others.