He's my what?!

Wait, WHAT!

Midoriya's POV

As class began, Mr. Aizawa announced something.
"Ok class" he began tiredly "Today we're gonna have to do some blood test." Most of the girls shrieked, while Iida raised his hand
"Why, sir?!" He said while chopping his hand fast enough to decapitate someone.
"Just Incase some of you get seriously injured and we have to replace some of your blood."
He said while staring straight at me. I mean to be honest I can't really blame him. I've gotten more injuries this year than the rest of the class combined.
"So" he started talking again "you'll each be called into Recovery Girls office one at a time, got that?"
"Yes sir." Said the entire class at the same time
As the day went by, people were being called into the office every 10-15 minutes.
When it was my turn, I got up and walked out and down the hall to the all to familiar nurses office. As I sat down, Recovery Girl pulled out a huge needle. To be honest, it was terrifying. Which sounds silly coming from someone who's fought the Hero Killer.
When she finished, she told me I could go back to class. I felt a little weird, but somehow made it back to class in under five minutes just in time to see Mineta leaving.
As the class ended, we headed to All Mights class. And Only ten minutes into the lesson he gets a call on his work phone. As he picks it up, Recovery Girl started talking to him, but not loud enough to make out what she was saying. In about 30 seconds, the call was over, and he simply said
"I have to go for a little bit. Don't do anything stupid." He eyes Kaccan.
Fair enough

All might POV

As I enter Recovery Girls office, she looks at me with a pale face, and simply says
"You need to take a look at this."
As I walk over, I look at the computer. It was.....Young Midoriya's blood sample? Under it showed his family tree. When I'm about to ask what's wrong, I see it.
In big bold letters where Midoriya's father should be, it says

"All For One"