Deku's childhood doctor just happens to be AFO's doctor.
Yoichi has the same color eyes as Deku. AfO literally has Deku's hairstyle.
Both Deku and AfO have a tendency to ramble on and on about shit.
Deku is obsessed with heroes, AfO became a villain to bring comic books into the real world.
The greatest hero. The greatest demon king.
AfO being a 1st Gen Quirk User would be likely to have a Quirkless kid than a 4th Gen like Inko and 'Hisashi'.
The name Hisashi is obviously fake, it's the same kanji used in Izuku's name when combined with 出, which means 'out'.
One of Deku's bullies disappears and gets nomufied.
And more, use your brain. You probably thought Minato wasn't Naruto's dad or that Masaki and Isshin were normal people.