AU where no one has powers but there are still monsters so Mina, Mako, and Haruka form a vigilante justice crew to take care of them.
And by form a crew I mean Mako and Haruka both started doing it alone because they’re stubborn hero types and Mina encounters them by chance, immediately realizes they need to team up and have some strategy if they’re gonna survive long term, and declares herself team leader before anyone can argue.
They’re all rough and tumble kids society gave up on, but they might just save the city.