The timeline is different here. And I'm aware Saitama's a bit OOC. But he's not gotten depressed over being too stong, yet. So don't get mad at me. This is an alternate universe type of story.
I do not own Smallville, or One punch man
On a bright and sunny afternoon in a small town outside of City Z, a young couple was taking their Produce down to the farmers market.
"Johnathan, are you sure we have enough crops?" the woman asks.
"Don't worry, Martha. It'll be plenty" the man replied, before honking the horn at people blocking the road. "I guess Smallville won the game, again. I just wish they wouldn't celebrate by blocking the road" he complains.
Suddenly, a baby starts crying in the backseat. "oh, you scared Saitama with the horn. Oh don't worry, honey. Everything's okay" Martha assures her child. "what the hell is that?" Johnathan wonders aloud. They get out of the car and look up to the sky. It's some sort large object coming towards the town. Scratch that, LOTS of objects! Meteors start raining down over the town, destroying everything in their path.
Johnathan and Martha jump back in the car, and start booking it for their home. They can only hope that they can avoid the meteors.
*13 years later*
Saitama and his friend Pete are looking out at their new school. After summer's over, they'll be highschoolers. So, they wanted to take a look at where they'd be attending.
"man I can't wait. We can play football, go to parties, drive. It's gonna be awesome!" Pete exclaims.
"yeah it will" Saitama replies.
"so what do you want to do after graduation?" Pete asks.
"man, I don't know. I mean, I had one thing in mind, but that was just a childish dream" Saitama sighs.
"well, man. Don't worry about it. You'll figure something out"
"heh, yeah..."
They both look out at the school for a moment. Silence growing between them.
"I guess that's assuming we live long enough..." Pete says in a serious tone.
"what do you mean?"
"think about it, Saitama. Over the past 10 years monsters have started appearing and terrorizing citys. Especially around this area. Everything around City Z is infested with monsters"
"hey, try to be more optimistic. Maybe someone will find a way to fight these monsters"
"if we're lucky, someone will find a way to stop them"
On their way home, they spot a kid with a butt-shaped chin playing with a soccer ball in the park. They stare for a second before begining to walk away. Suddenly, a strange and terrifying voice exclaims "FOUND YOU!".
Saitama looks back to see a large crap man coming for the kid! Saitama didn't know what was happening. His legs just moved on their own! He jumps and grabs the kid, just as the monster unleashes it's attack!
'what the hell am I doing?!' Saitama thinks to himself.
"trying to play hero, are we?" the monster asks.
"look, kid. He's after you! RUN!" Saitama shouts, but the kid doesn't move.
"I have to get my soccer ball"
"ARE YOU SERIOUS?!"
The monster just stomps the ball, popping it instantly.
"what do you think you're doing, kid? Back off" the monster demands.
"why are you after this kid? What did he ever do to you?!" Saitama asks.
"if you must know, that kid drew nipples on my manly shell chest! I've got claws, I can't even use a towel to wipe it off! So if you don't want to die, I suggest you get out of my way!" The monster exclaims.
Saitama just starts laughing.
"man, it just came to me! You look just like a villain from this kids cartoon I used to watch!"
That did it. The monster starts beating Saitama senselessly. All Pete could do was watch. What could he do? He wasn't strong enough to beat this monster!
The monster punches Saitama through a nearby shed.
"now that that's taken care of, where were we?"
the kid starts to tremble in fear. But then, a rock hits the monster in the head. It looks over to see Saitama, blood running down his face.
Unbuttoning his over-shirt, something sparked inside Saitama in that moment.
"you know, when I was a kid I wanted to be a hero. Not an office worker or anything like that! But a superhero who could send rotten villians like you flying with one punch! Screw all that crap! Bring it on!" he shouts, determination in his voice.
"oh, a hero, huh? You're pathetic!" the crab monster shouts, before pumbling Saitama yet again. But suddenly, he manages to wrap his shirt around the crabs eye-stalk. Pulling it as hard as he could, he rips it's eye out, and with it, it's internal organs!
Pete couldn't believe it. Saitama, the guy who was never even slightly athletic, just took down a monster. Sure, he did work on his parents farm, but he was still weak and skinny.
Saitama stared at the corpse of the monster, a fire in his eyes. His childhood dream isn't dead, yet!
*later*
Saitama, Pete, and their other friend, Chloe, were sitting on Saitamas porch overlooking the cornfield. "so, you're serious about this whole hero thing?" Chloe asks. She was just told about Saitamas victory against the crab monster.
"yeah. I'm gonna become the strongest hero. One who can beat any enemy in a single punch!" He says proudly.
"and how do you plan to do that?"
"I'll train"
"what kind of training?"
"you know. Strength training"
"school starts in a month. How are you going to have time between school, homework, studying, and working on the farm to train?"
"I'll just have to come up with something simple, but effective"
"like what?"
"like, em... Push-ups"
"that's good. That'll make your punches stronger" Pete chimes in.
"sit-ups, too. I need a strong core"
"get some abs"
"but don't neglect your legs" Chloe tells him.
"right. I might need to jump, too. So I'll also do squats"
"but how are you going to get around? It's not like you can fly"
"Then I'll also do a 10 kilometer run!"
"okay, so you've got something to increase your punches, something to make sure your body is strong and stable, something to help you jump high, and a way to get around. I think you might be able to pull this off, Saitama" Pete exclaims.
"you're hopeless. There's no way that will make you strong enough to battle monsters" Chloe explains.
"eh. We'll see" Saitama says with the same fire in his eye.
The next morning, he got up at 6:00am and immediately ran down stairs in a blue tracksuit. Ready to begin his new training regime.
"since when are you up this early?" Martha asks.
"I'm gonna workout" Saitama casually replies.
"okay, well at least get some breakfast"
Saitama, knowing he can't fight with his mom, grabs a banana.
After eating his banana, he goes outside and starts doing push-ups in the grass. Due to how weak he is, muscle fatigue sets in after just a few push-ups. However, Saitama had big dreams. So with every ounce of willpower he had within him, he managed to keep going. Eventually reaching 100 push-ups! He then went on to sit-ups, and then squats. Then set off on his 10km run. It didn't take until about 3 kilometers for his nose to start bleeding, but he didn't care. He kept running.
The next morning was hell. He woke up feeling every muscle within him screaming out in pain. But he still changed into his tracksuit, went outside, and did his exercises. Every push-up felt like his chest and arms were gonna rip apart. Every squat felt like his legs were gonna give out. With every kilometer he ran it felt like his lungs were going to burst. But he had big dreams ahead. So he kept at it.
Days turned into weeks, and suddenly, the workout wasn't as hard anymore. He still struggled through it, but it didn't feel like his body was going to be ripped apart, either. He felt he was finally ready for school, tomorrow.
His first day at Smallville high.