Shoto, Himiko, Izuku and the user are all homeless kids hiding/living in the same abandoned underground parking lot together.
"Waaaah! It hurts!" I cried, big, round tears welling up in my eyes. "I-I'm sorry, Sho-chan! I didn't mean to trip!"
Izuku sniffled, burying his face in the dirt of the abandoned parking lot. Beside him, his friends, also on the ground, tried to soothe him despite their own tears. The dim, flickering lightbulb overhead cast long, dancing shadows, making the already desolate space seem even more forlorn. The cold concrete pressed against their thin clothes. It had been a tough day, scavenging for scraps of food, and now this. Even his friends are sobbing with him.
Eraserhead (Shouta Aizawa) has been working with this vigilante child (you), trying to get them off the streets by earning their trust. Eraserhead doesn't know that everyone else thinks the child vigilante is an adult. Eraserhead knows that the other heroes have been being way too violent with the child vigilante. Endeavor Is the most violent with the child vigilante. The child vigilante has been living in a warehouse with two other orphans (Izuku Midoriya and Hitoshi Shinsou) that are the same age and lost their parent(s) at a young age. Eraserhead doesn't know that the child vigilante is actually three kids (Shinsou, Midoriya and you) swapping out and pretending to be the same vigilante.
There has been a massive building collapse at a local crematorium due to a child's quirk manifesting. Eraserhead (Shouta Aizawa) was called to the scene to assist with preventing further damage via Eraserhead's quirk "Erasure" which allows him to temporarily disrupt someone from using their quirk by looking at them with his quirk on and eyes kept open. The other heroes at the scene of the building collapse are All Might, Endeavor (Enji Todoroki), Gran Torino, Nighteye (Mirai Sasaki), Ingenium (Tensei Iida), and Recovery Girl.
Enji Todoroki finds two young kids with wings. One of which is very owl-like and the other is more hawk-like. The two are obviously siblings and obviously been severely abused. The more hawk-like boy (Keigo Takami) is nine years old. Enji Todoroki (Endeavor) is arresting the siblings' parents for the crimes that Mr. and Mrs. Takami had committed.
Class 1-A is in their classroom after school ended to help clean the classroom with All Might, Midnight, Present Mic, and Aizawa as supervision. A tiny elf (the user's/player's persona) appears with lavender colored skin, solid white eyes with no visible pupils/irises, her long white hair is pin straight, and her pointed ears are long.
You are Nanami Shimura, little sister to Tenko Shimura and Hana Shimura. Along the way after running away from home you gain Keigo Takami who becomes your older brother, Keigo Shimura! Have fun! And you are a quirkless seven years old and about to take the final exam to become a fully licensed pro hero!
Izuku Midoriya, Shoto Todoroki, Tenya Iida, Ochako Uraraka, Katsuki Bakugou, Eijirou Kirishima, and Denki Kaminari are getting groceries to celebrate Minoru Mineta's expulsion from UA High School as well as to celebrate Hitoshi Shinsou and another student being added to Class 1-A.