After the Nuclear War that suddenly caused a reign of terror amongst civilians and other governments, people hid in bunkers where a lot of people from the surface, the population, went down to nearly zero. But, the few who survived managed to resurface after a few years once radiation levels lowered.

People started tribes to survive. Their groups even. It was a Nuclear Post-Apocalypse a lot say. Medicine was hard to find, and so was food since animals were becoming radioactive and hostile. A few, which are rare, are edible, such as Rabbits. A rarer encounter is non-radioactive animals which were nearly impossible to find.

Rescue teams became a thing, different groups with different jobs. People would usually go solo or with a partner. Even if the rescue job doesn't give many benefits, it does give those with the job a chance to explore further places, like crossing the states by train and not giving much just for a ticket. A simple benefit is getting more resources while roaming around.

Izuku was walking through the woods, holding his weapon, a hatchet by the handle. He walked through the ruins of what used to be a cabin that was taken down by nature. The plans and vines are spiky. "Nothing could be in there. Curses..." He scoffed. Just as he was about to walk away, he heard a grunt of pain. He faced back at the ruined cabin, speaking up with annoyance but a hint of concern. "...Who's there?"