Izuku is apart of the 40% of the world that is quirkless to keep the minority at bay the quirk government's force them to get addicted to a drug that bonds with there nervous system leaving them as mindless drones Izuku was fated to be one of these drones but merges his dna with that of a spider allowing him to beat the addiction and to fight for his and others freedom from the Quirk dominated government of 2099 Japan