DuePapayaBear
Izuku's dream was to be a hero. He still wanted to help people, even though he knew that superheroes didn't actually exist. He knew his dream was impossible. And even if superheroes did exist, who was he kidding? Someone like him couldn't possibly be a hero. He was too weak.
So when a field trip to a genetics laboratory ends with him getting bitten by a radioactive spider, and he wakes up with newfound powers, he realises that maybe his dreams really can come true. Well, not exactly, though vigilantism does have a nice ring to it.
And, the law is overrated anyway!
Donning a mask Izuku must now be the hero that his city needs. Juggling his school life and secret identity as a vigilante is hard enough, so what happens when his childhood friend, whom he's lost touch with, comes back to town?
or,
in which Izuku is Spider-Man and is really bad at keeping secrets, Katsuki is not having it, Shinsou is tired, and Aizawa deserves a raise.