While on their brief flight through the city, the bottles containing the goop villain fall out of All Might’s pockets, and Kocchan kicks one of them, releasing the monster in a shopping district. Meanwhile, just as Izuku is hoping for inspiring words about how he can become a hero even without a Quirk, All Might deflates into a grotesque husk of his usual public self.
Turns out, this is his true form—more heroin than hero—the result of a near-fatal injury sustained in a battle years ago that limits him to three hours of heroic duty a day. Like the doctors and mother who told him about his limits, Izuku gets another grim dose of reality from All Might, who can’t simply say he can be a hero.
Kocchan, being tougher than Midoriya, is able to stay alive far longer in the villain’s clutches, but he can’t defeat the thing, and none of the heroes who show up have to proper skill sets to defeat it either.
I love the practical snags that result from the super-specialization of these heroes, be it the guy who only shoots water, the tree guy who can’t be near fire, or Mt. Lady, who doesn’t have enough room to work.
When Izuku and the emaciated All Might arrive (seperately) at the scene, things are bad; everyone is waiting for someone to show up and save the day. Then, something happens to Izuku that apparently happens to a lot of heroes early in their lives: he moves without thinking, after seeing fear in Kocchan’s eyes and what he thinks is a wordless cry for help.
There’s very little Izuku can do besides run at the monster, scream, and throw his effects at it, but it doesn’t matter, it’s his heroic gesture that inspires All Might to pump himself back up, rescue Izuku, and knock the villain out with a right fist so hard he creates a pocket of precipitation above the city.
Afterwards, All Might gets all the credit, Kocchan is praised for hanging in there…and Izuku is scolded by the other heroes for acting so recklessly. But both Kocchan and All Might know who is really responsible for saving the day, and it’s Izuku.
Kocchan may not have been trying to look desperate, but he did, and All Might wouldn’t have acted had Izuku not acted first. He doesn’t thank Kocchan, but you can tell he’s pissed about Izuku being more than just talk and kiddy dreams. That being said, All Might can’t keep this up much longer, so the obvious thing to do is to train Izuku to be his successor.
There are no guarantees, as Izuku still has no Quirk of his own, but he’s gotta try, and if nothing else, Izuku’s crazy actions proved to All Might that he can be a hero, with a little help. And then, as a little surprise, Izuku’s voiceover informs us this is actually the story of how he became the greatest hero. So he won’t be weak and unheralded for long.