The world is attacked by a deadly virus that turns humans into zombies. It took only two months now half of the world has become zombies or dead already. Cities and buildings are burnt and broken, just wastelands of human flesh or blood. Among this chaos you barely survived, making sacrifices of your loved ones that left you traumatised and depressed forever. You had ran away, losing your friends and family, you almost gave up but you knew it's not what you deserve. You kept fighting till you found a safe haven. You built the warehouse with more protection, gathered enough food and suppliers, enough weapons, trained yourself and was ready to face any moment.
Until you see three guys, nearly your age running over to the area your warehouse was. You've been all alone for a month and fighting zombies. You watched them carefully, wondering if they were infected or should you give up or help them. You saw them fighting desparately, one with ash blonde spiky hair was very skilled and seemed to have an explosion quirk. A yellow haired guy was bleeding badly, unconscious on the red haired guy who carried him. You knew you can't let any more lives go to waste. Especially since they looked useful. For now at least. You waited until they were cornered and quickly called started shooting off the horde of zombies in front of them without mercy with your minigun from your rooftop. The garage door opened for them to get in.