My Hero Father

The world isn't how you know it. All for One rules with an iron first and army of skilled warriors behind him. He won the first time, his younger brother lost and nearly died all those years ago... but not in vain. Not only was One for All passed on, but a resistance formed.
Now, the world lies in ruins. Only the meek and weak survive. Children with strong quirks are stolen from their parents either to be raised as slave warriors, have their quirks stolen, or killed. Parents with strong children look to the resistance, led by the famed All Might, for help.
Children are shuffled through an underground system of rebellion workers who evaded capture as kids themselves. The best of the best in this underground is known as Shota Aizawa, he can deliver every child to their safe houses, but after that, he's never seen again until the rebellion calls him up... that is simply how he works.
But then things change. He saves a quirkless boy who has nowhere to go, he's asked to raise a group of immensely strong children who All for One hunts like dogs.
Will Aizawa be able to protect these children? Or will he die trying? Failure is not an option, that's all he knows.

Warning: Language, Action, and Gore
Warning: Fluff, family, and adorable headcanons