He Lied
Dr_I_Know_All
Summary:
From a young age, Izuku had to hide his quirk. At first he did it because his dad asked him to, because it was something special that he could do with him. It wasn't too long before he started hiding it in shame. When he finally meets his idol, All Might, Izuku decides he can't live like that anymore. He has to take down his villainous father, All for One, no matter how much it hurts.
Basically, I looked at some fan theories about Dr Tsubasa, All for One, and Izuku and then decided, 'Hey, I want to make a fic.'