One's Justice
Introduction
Prologue one- Izuku Midoriya
In a world where 80% of the population has a special power that allows them to reach new heights and exceed their limitations which has led to a new profession: Heroes. Heroes use their gifts for the benefit of their fellow humans or to merely achieve fame to satisfy their egos. But there are beings, either natural humans or unnatural inhumans, who use their power for mindless mayhem and create environments of survival of the fittest. The "naturals" are named villains, while the unnaturals are monsters termed "Mysterious Beings". Those without these 'quirks' are cursed to feel inadequate. They wander the world leading unexceptional lives and must be prey for the strong to express their superiority through simple bullying or outright attacking these quirkless minorities.
However, there now lives a young quirkless boy, Izuku Midoriya, who refuses to allow his lack of power to discourage him from becoming a great hero like his idol All Might. Izuku has always adored heroes like All Might for their determination to succeed and protect those who can't protect themselves, and so he dreamed of one day becoming a great hero. But sadly, at the tender age of 4, Izuku's dreams were dashed when he learned that he was quirkless. All the kids, including his so called "friend" Katsuki Bakugo, never neglected to remind him of his status as a no quirk nobody. They gave him the name Deku, as in "one who can't achieve/do anything." They would even go so far as to unfairly use their powers on him whenever his talked back or protected another kid from their bullying. His sweet and loving mother would console him every day, hoping that her comforting words will alleviate his broken heart. But the boy is stronger than she thinks, for despite having no quirk, Izuku is undeterred. Instead, this reality pushes him to become better, to study the strengths and weaknesses of those with quirks so that he can somehow fulfill his dream.
Prologue two- Saitama
Saitama was just a below average individual of the quirkless 20% of humanity. He had no luck in finding work as a salaryman, was always mocked for being powerless, and ignored by others for having cold, dead eyes. But he never payed any mind to the insults, he just wanted to go home after every rejection and hope the next day would turn out just a little better. One day, he found himself in a predicament no one without a quirk would want to be in, going up against a Mysterious Being. After a coming out of the fight with grievous injuries, Saitama was taken to a hospital after two Pro-Heroes (Water Hose) arrived only to find the crab-like being dead and Saitama's unconscious body next to a little girl who was pushing on him, desperately asking him to be all right. The Hero couple asked the girl what happened, but she was too traumatized to tell them. The two concluded that a Pro-Hero defeated the monster but must have left the injured man unattended to chase after another monster that might have accompanied the crab creature.
After leaving the hospital, Saitama decided that he had to get stronger, so he could protect others better and show that he doesn't need a quirk to be a hero. Every day he would train his body past its limits no matter how great the pain from his training was. Overtime, Saitama gained enormous strength, enough to destroy monsters in one punch and knock any villain unconscious. Never once did he try to take credit, never once did he stay behind to obtain glory or fame. All the credit for every fight would just go to any hero would gladly and selfishly take responsibility for feats not their own just to climb in rank and popularity. Saitama just does this hero stuff because he wants to, so every time he would just walk home after every fight to live his life and look forward to the next match. Unfortunately, after three years Saitama finds he can ONLY beat his foes with one punch. No monster or villain can take even one of his mighty blows, so the lack of challenge has taken the thrill out of his hobby. With his power costing him the ability to feel emotions, Saitama has lost the spark that had driven him to become a hero. That is, until he meets a someone who was like him before he achieved his power. This person's drive and passion may be what reignites the spark that the mighty One Punch Man has lost.