Daylight.

When Izuku Midoriya, who just fought the Hero Killer meets a vigilante codenamed "Iris", they fight and in a quirk - related accident the two of them find themselves during the Dawn of Quirks. Izuku not only has lost most of the former power of One for All but is stuck with a quirk called "Green Flare". With no chance to get back home, Iris and Izuku began working together to survive in those desperate time while fighting as vigilantes. And after months of their work, the Resistance caught a wind of them.