MajorityMuke
80% of the world's population had died off in world war 3 in the year 3950 and another 5% died from disease.
When Katie's father dies, her brother finds her alone. They make their way to a small group of survivors called Ameneesia with hope it will be safe.
That's where she meets Harry
When Harry and her brother is 'killed' by an explosion she created, she is left alone.
One year later they come across each other, but every day it's a fight to survive. This story is an AU so you can read it even if you're not in the fandom