Izuku Midoriya: Origin

Some time ago, a younger Izuku Midoriya stands up to Katsuki Bakugo in order to defend another child from being bullied. Katsuki Bakugo doesn't take "Deku" seriously and mocks him for being Quirkless and attempting to play hero. Back to present time, a now 14-year-old Izuku Midoriya watches as Heroes battle an enormous villain.

One day long ago in Qing Qing City, China, a luminescent baby was born with a unique power. Then, as time passed, the similar phenomena happened all over the world, and soon the majority of the population had obtained superhuman powers known as "Quirks". Due to that, people were able to pursue heroism as a profession.

As Backdraft keeps citizens at a safe distance, Kamui Woods battles the gigantic criminal. Kamui Woods states that the villain used his Quirk for illegal purposes, and uses Lacquered Chain Prison on him in an attempt to stop his movement.

However, Mt. Lady shows up and uses Canyon Cannon to defeat him. Several people start photographing the heroine as she declares that today is her debut and asks for the rest to be left up to her. Izuku Midoriya starts rapidly taking notes about Mt. Lady's Quirk, Gigantification. A man wonders if he's aiming to be a hero, wishing him good luck, to which Izuku Midoriya happily answers that he'll do his best.

At Aldera Junior High, a teacher lectures the class about considering their futures. He says he will hand out the printouts on the students' desired life-course, but knows they all want to be heroes. As the class starts using their Quirks, he reminds them they're not allowed to use them during school hours.

Katsuki Bakugo tells the teacher not to group him with everyone else because he's superior. His classmates yell at him for that, but Katsuki Bakugo tells them to shut up, and they remember he's aiming for U.A. High School. As the students comment about the difficulty of the exam, Katsuki Bakugo declares he aced the mock exam and intends to surpass even All Might as the top hero. The teacher mentions that Izuku Midoriya also wants to go to U.A. The whole class then turns to face Izuku Midoriya, erupting in laughter moments later.

Izuku Midoriya's classmates say there's no way he will be able to get into the hero course if all he can do is study. Izuku Midoriya attempts to defend himself, but Katsuki Bakugo aims an explosion at him, saying that Izuku Midoriya shouldn't put himself in the same level as him since he's Quirkless. Izuku Midoriya explains that he is not trying to compete with Katsuki Bakugo, and is only trying to follow the dream he had since childhood because he will not know if he can accomplish it if he doesn't try. Katsuki Bakugo says that the exam is impossible for him, as the whole class looks down on Izuku Midoriya, snickering.

Elsewhere, a Sludge Villain with a fluid, slime-like body is on the loose. As a crowd nearby watches him run away, a person comments that there is no end to villains. A man then answers that there indeed is an end to them, because he is there. Back at Izuku Midoriya's middle school, he picks up his notebook while reading about the incident on his phone, but as he gets ready to get home and take notes, Katsuki Bakugo approaches, exploding the notebook with his Quirk. He then throws it out the window and tells Izuku Midoriya, who does not reply to his taunts, to give up on U.A. and dive off the rooftop. As Izuku Midoriya picks up his notebook, he remembers an incident from his childhood: watching a video of All Might making his debut as a hero, saving over 100 people. Izuku Midoriya says he wants to be just like him but is later told by a doctor to give up: he has two joints in his pinky toe, which shows that he is Quirkless. Later that day, Izuku Midoriya watches the video again, crying, and asks his mother if he can still be a hero like All Might, to which she starts crying and apologizes.

Back to the present time, Izuku Midoriya is attacked by the runaway slime-like villain shown before while walking home. Suddenly, All Might appears and uses Texas Smash against the villain, a powerful wind pressure move that defeats the villain. Izuku Midoriya vaguely sees All Might and faints shortly thereafter. Once Izuku Midoriya wakes up, he's shocked to see his idol right in front of him. He asks for his autograph but sees it's already in his notebook. After seeing Izuku Midoriya is safe, All Might starts leaving with the villain in his custody, but Izuku Midoriya grabs onto his leg and ends up flying with him. When All Might realizes it, he tells Izuku Midoriya to let go of him, but Izuku Midoriya says he'd die if he did, so All Might looks for a place to land on. All Might starts bleeding from his mouth and gets worried due to it.

All Might lands on the rooftop of a building. Izuku Midoriya asks the man if someone who doesn't have a Quirk could also be a hero like him.