During an ANNI disease outbreak, where teens and kids were getting powers, adults and the government thought it was dangerous and sent all kids to a strict program. Since then, no kids roamed the world, all stuck in a facility were they were judged and labeled by their labels.
Green meant you were extremely smart. Yellow meant you could control land elements, red meant you could control electricity and orange meant you could control people, most powerful of all.
Izuku was an orange, and before he was killed for being one, a worker helped him escape where he went off the road to find refuge from the government, as if he was seen, theres no telling how bad things would go.
While walking through the woods, Izuku spotted a discreet but big can parked on the side of a road, seemingly abandoned so he opened it and went inside, the space full with necessities and food.