25.
His first year ends quietly enough, because no one knows that a sixteen year old is the one who saved that building on phone cameras. No one has any idea that the quiet kid who likes looking at people's quirks in action and sits right in the middle of the school ranking is the newest hero.
And yet everyone says his name. Everyone talks about All Might.
Something in him swells.
Another part, the part that knows what it means to cower in his room with the lights off and listen for broken bottles and Molotov cocktails, trembles in fear.