Chapter Text
Premise: All Might, Aizawa and Midorya are all sons of All for One. Too bad that they do not know that, not even the father himself does
Immortality and villainy can get boring over time, so what do you do?
So over time, with a few flings and short relationships over the years, life is fun.
It is important to note that such things have a chance to end with the creation of a new life, not that AFO has ever stuck around long enough to be aware of such an occurrence.
All Might and Aizawa also fall into this category.
Often, All for One's children end up quirkless because he is a first-generation quirk user, or they have strong and unique quirks, like Ereser for example.
AFO is Hisashi Midoria and Izuku is born quirkless, everything else is pretty much canon.
For some reason or another, this bit of information is revealed, and they use it to make AFO's life difficult while they grapple with the fact that ther sperm donor is not only a villain, but the villain: All for one.
Maybe they open up a support group for all his children and descendants they find, to talk shit about him.
Extra points if other known characters are his children or direct descendants, for example: Endevor.