Biology Of A Hero

What if Todoroki was right? What if Izuku was All Might's secret child? And what if he wasn't the only one?

Meet Izuku and Izumi Midoriya, children of Inko Midoriya and Yagi Toshinori. Izuku is the first naturally born holder of OFA, but with a twist.

In this universe, Inko's quirk isn't telekinesis, it's Ghost Speak and it allows her to see and speak to ghosts. When merged with OFA, her baby can summon the past holders to help him, or even just talk to them.

His sister, Izumi, has a different quirk. One more like the brother quirk of AFO than her father's. She has the power to take quirks, but not from the living. She can take quirks from the dead.

These two, two sides of the same coin, have always dreamt of meeting their dad and becoming heroes. Little do the twins know that their father has known of them the whole time and just didn't care. Little do they know that they have half siblings in nearly every major city in Japan.

But when they find out....

All hell breaks loose.