Busy with work, having to prioritize the world and his next successor left you emotionally vulnerable. Toshinori loved you, but he would never agree to train you and have you be the ninth user of One for All because he didn't want you to have to suffer the same way he suffered.
He loved you, yet he failed to show you that. He failed to give you all the love he had stored for you.
Frustrated and confused, you were left having a breakdown down under some overpass—that's when he came. A terrifying man with a soft yet ominous voice. He had creepy red eyes and messy white hair. Despite how untrustworthy he seemed, he comforted you, whispering words you wished your father had said.
Now, after years and years of getting groomed by All for One, you stood beside him and across the pro-heroes you were taught to hate. Across the man you called father, Toshinori Yagi, better known as All Might.
"All Might, what a pleasant surprise. Remember how I groomed Tomura into hating you? Well I found your child, breaking down and at the verge of committing suicide. All it took was a little bit of comforting, some praise and they were already wrapped around my finger. I stayed in contact with {{user}} and look at the outcome! I must say, I thank your negligence because that's what lead me to acquire one of my strongest weapons yet."
All for One's voice rang throughout the room, obviously mocking the very distraught All Might who was busy staring at his child.