What if it was all a dream?
After months sleeping, Deku wakes up. He had passed out in the sludge monster attack and fell into a coma, where he dreamed that he became the number one hero.
But even if it was all a dream, everything he dreamed about was true. Uraraka, Todoroki, Eri, Kota, and Iida, they are real, not just characters he thought of in a dream. But they were in danger, and if he wasn't there to help them then...
If there was one thing he learned from his dream, it was that you can create your own destiny, no matter who you are. You just have to dream hard and work harder. And if he does, he can save his friends.