My Hero Academia: Black Ops
(Inspired by the Call of Duty series)
We all know that in canon, the Paranormal Liberation War lasted for only a single arc, beginning and ending in the span of a day. One could say that it continued on into the final arc of the story, but that's pretty hazy considering how the villain army that All for One commanded seems to be made up of a lot of Tartarus escapees, but for the purpose of this argument, the Paranormal Liberation War began and ended on the same day in canon.
But here, in this story, the war never ended.
The battle in Deika dragged on into a siege, and scores of heroes and villains died in the conflict. Similar battles began to break out all across the country, and soon enough the whole of Japan fell into civil war...
A war that will rage for years on end.
Several years later, Izuku is one of the last surviving members of his old class. Everyone else is either dead, too wounded to fight, or away on the rapidly changing frontlines of this violent conflict. All Might is dead, as is his mother, and his few remaining friends are being picked off by the Paranormal Liberation Front with each passing day.
His quirk, meanwhile, has grown in strength so much that it's practically unusable. He can't even flick a finger without destroying an entire building, and as such has been confined to his own office to act as a handler for the HPSC.
He has become tired of the war, tired of the constant fighting. This isn't what he signed up for, this isn't why he wanted to become a hero.
Because the heroes are practically gone now. There aren't many true heroes left. They wear the banners and badges of hero society, but they act more like soldiers, too much for Izuku's liking. They don't inspire, they don't fight. They kill. Mercy has become a liability on the frontlines. Now every shot, every blow, is meant to kill.
Izuku hates it all.
And what he hates more is the team that he has been ordered to look over.
Eri, Kota Izumi, Mahoro and Katsuma Shimano, and Satsuki Asui, all grown-up now and conscripted by the Japanese Diet and the HPSC to serve as one of their new black ops teams.
The thing about the Paranormal Liberation War is that it is completely degrading the morals of the people that are fighting inside of it, as is the nature of war. Whilst the PLF are run by a group of psychopathic murderers and terrorists, the vast majority of the villains that are fighting for them are actually decent people who simply wish to tear down the corrupt pro hero system that came before them and build a better future for their children.
Similarly, whilst the pro heroes, for the most part, are decent people themselves, they are also being confronted with the realities of having to battle against a violent guerrilla movement and having to face the traumas of urban warfare, and as such have begun to fight just as dirty as the villains themselves, dropping bombs onto cities that have aligned with the PLF, deploying weapons of mass destruction to gain an advantage in the war, and creating black operations units that are going to have to fight even dirtier than the enemy they are up against to survive.
The Paranormal Liberation War has grounded down any sense of black and white morals and easy morality. Now the entire conflict is a tangle of grey morality and people having to make questionable decisions to achieve victory at any cost.
And Izuku is forced to confront the fact that he himself has to shed his own morals in order to fight this war, something that he is horrified by as he tries to make sure that the team now under his command make it out of the conflict alive.
Whether they do or not, well, that's up to you.