Saitama episode! A little early because I was so excited to get this out.

Warning: Saitama does a swear

It's kinda hard to believe it's been 4 years. 4 years ago I started training, becoming a quirkless hero. I worked myself to the point of losing my hair in 1 and half, then I trained for another 2 and a half. I'm kinda glad the kid isn't showing signs of balding, but how come he's got some of the strength? Is it only for me that it ended up the way it did? How did it even start for me again? Oh yeah.

Cue Saitama's backstory, just make it that the crab guy has a crab quirk and the same goes for the big chin brat. And change Saitama's statement to:

"When I was a kid, I wanted to be a hero who could stop guys like you with a single punch. I was told that could never happen because I didn't have a quirk. But you know what? Fuck that! I'm not doing some office job! I will be a hero! And I will be able to take out even the strongest person with one punch!"

So I guess that's how it happened. He was holding a pack of crab claws in the supermarket. "That'll be 1,800 yen," said the cashier when he got there.

"Wait, I have exact change." Digging through his exact wallet, he didn't even seem to notice the villain destroy that side of the building. "Here's the 1,800 yen." Now he noticed. He walked out to find the man responsible. A 60ft tall man obviously with a gigantification quirk. "These quirks are way too common." He landed on the shoulder of the villain.

"Hey big guy, you're breaking everything here. Mind shrinking down."

"Aahaha. Aaahahahaa. Aaaahahahahahahahahaaaa! I bet you think my quirk is gigantification!"

"Well yeah..."

"Wrong! It's a strength enhancer! I was just born giant!"

"Sheesh, I feel bad for your mom," he mumbled.

"Don't bring my mother into this!!"

The villain grabbed Saitama, squeezing. He threw him through multiple buildings, smashed him into the ground and started pounding. He finally calmed, believing his opponent dead.

"Sorry I mentioned it. Didn't realise it was such a touchy subject."

The behemoth looked in absolute astoundment that he survived. "Is your quirk some sort of nullification?"

"Nah, I don't have any quirk."

This seemed to be horrifying to him. "No way! You're lying! Who the hell are you?!"

"I'm just a guy who's a hero for fun." He gave a small smirk at the villain's flabbergasted face. "And I'm gonna take you down now." He dashed towards the man's shoulder once more, giving a chop to his neck. The giant was immediately incapacitated. "You know, even though Midoriya wants my hero name to be One Punch Man, I have to give a lot of neck chops so I don't kill these guys. Well, the pros are here, so I should probably go."

"Wait!" A voice called out to Saitama. Was it familiar? How could it be? He turned around. Damnit what am I doing?! The heroes are gonna kill me.

It was the hero Kamui Woods. "I've seen you leaving the scene as soon as I arrive a lot. And there's even been times I hadn't arrived yet but witnesses described you taking them out wit a single neck chop. Older accounts reckon you punched them once and they died gruesomely. It's been more than a year now. If you were a hero you'd surely take credit to get paid."

Saitama looked down, sighing heavily. "Yeah, it's all true. And I'm a vigilante which I think is what you were hinting at. Do you have a point?"

He looked shocked at how easy the answer was to coax. "Well, you know you're supposed to—"

"Be a licensed hero to use your quirk for heroism. Yeah, but I don't have a quirk."

"... But you took so many villains out with a single punch!"

"Yeah, but that's thanks to my training. I don't need this 'next step in evolution' to have power. Humans beings are strong because we can change ourselves."

"You should still become licensed. That way you can actually make a living from it."

"That's what the kid always tells me," Saitama commented under his breath.

"Wait, are you the trainer of that quirkless first year in UA?"

"How did you know about that?"

"It's all anyone's been talking about for a while now. It makes sense that you're his trainer."

"Guess it's hard to deny. Yeah, I am."

"If you become a qualified professional, you can inspire that kid even more."

"You know what? I think I will. Thanks, dude." He began to leave but Kamui quickly added.

"I suggest maybe becoming All Might's sidekick when you have your license. You definitely qualify. His punches also had to be tamed and not kill people." There was a little pause, then Saitama left.

All Might, or in his current form, Toshinori Yagi was sitting on the couch in the teacher's lounge. This morning he'd pushed his heroism a little too much and now the hero couldn't join his students, young Midoriya one of them, to the USJ. He was waiting for principal Nezu. The large mouse entered the room. "Toshinori, sorry I've kept you waiting."

"Not at all sir!" The little body climbed on the couch to face the number one hero's true form.

"It's really a shame that you used so much of your time today and cannot join your class today. Midoriya still hasn't warmed up to you."

"It's all my fault honestly. I overused my quirk today... And I told him he could never be a hero without a quirk."

"Truly it is your fault." This seemed to shock the man. Not the truthfulness, just the bluntness. "But we cannot change the past, and dwelling on it is the worst thing you could do. I called you to discuss his current trainer, this Saitama."

"That's what the kid said his name was. So what about him?"

"Everything. His effect on the boy, his training, his own power."

"Well like I've said, he's at least as fast as me in my prime, but that was for only for a few meters. I've heard he has Midoriya run 10km everyday! If that's the sort of training he has, it makes sense that he's as powerful as he is. The boy seems to be a lot more reassured than he was almost a year ago."

"That's quite interesting. He most likely does even more running a day than he makes his student. I'd definitely say he has stamina to run like you used to. But if that's only one aspect of his power, what else could he be capable of?"

"I did digging on him in the time I tried finding young Midoriya. He's never been seen throwing more than a single punch, and he's never needed to. He's killed them all with a single punch!"

The mouse spat his tea. "Killed them?!"

"Yeah! But ever since that day they met, he's neck chopped them. They live but a few of the weaker ones were out in minor comas. Lasted less than a week every time, but that's still some immense power."

"Indeed. If it takes only a few years for Izuku to achieve such power, villainy may drop to as little as 3% with both of them out there. The next matter to tackle is the fact that he doesn't have a license. While strictly speaking he doesn't need one, it's a bad example to give his disciple. We'll have to teach him ourselves that he needs to have one. I'll let the teachers know to make a sure point of that. In any case, is there anything else?"

"The USJ is under attack!" Both All Might and Nezu turned to see Tenya Iida relaying this message. Luckily Toshinori's reflexes kicked in in time so that the student never saw his true form. That was close, too close. But I have no time to think about this. I need to save my students!

That morning, Saitama took a visit to UA. His visit was authorised by the school the previous day, the same one he spoke with Kamui Woods. No point in waiting until I'm a hero to learn how to control my punches. Who knows what's gonna happen in that exam. Oh please don't let there be a written exam.

Outside, he was blocked by a huge swarm of reporters complaining that they couldn't get inside the school and it was so rude that they'd kept them out. It's their jobs. If a school were swarmed by intruders, they risk those students. Are these people actually so dense that they don't realise that? Elbowing his way to the front, he yelled in hopes that someone inside heard him. "Hey! I'm actually meant to be here! I made an appointment yesterday!"

"You made an appointment?" a reporter next to him queried.

"Yeah, you should actually try that."

Before anything more could be said by anyone, the ground beneath him gazed open and closed before anyone else could fall in. He found himself on the other side of the gate in a second. Looking around his new environment, he turned to face a block of concrete in clothes and with a ponytail.

"I apologise for the unethical entry. As you saw, there's a lot of news reporters wanting to get in so they'd storm through if we opened the gates."

"I get'chya. They also here for All Might?"

"I'm certain with different hopes than you have. You never gave a reason but boy was he shocked and excited to see you."

"So if he's so excited can I see him now?"

"Unfortunately, he did a little too much heroism this morning. He's a bit too exhausted to see you right now. He will as soon as he can."

"The USJ is under attack!" A rather tall teen had entered the room unannounced.

"The USJ?" questioned Saitama waiting with Cementos in the teacher's office.

"It's where class 1-A went for training today!"

"1-A? I think Izuku said he was in that class."

"You know Midoriya?" queried the teen. "You must be the trainer he spoke of! Please! You need to help us! He's in trouble! They all are!"

"Calm down kid, I'll go." He turned his head to Cementos. "I'll be faster if I go on my own." To this Cementos nodded. "Alright, kid, where is this place?"

At the USJ

Izuku was running as fast as he could, which was quite fast, towards his classmate Asui. The guy with hands all over had flayed Aizawa's elbow, he didn't want to find out what would happen to her neck. He pulled his hand back, putting his all into the punch he was about to lay on this villain, he felt like it was 100 times his punch to the robot in the entrance exam. Boom! His fist collided! With the beast who broke Aizawa's body?! It didn't even dent him! All that for him to take a little step back?!

"Well done! You managed to move Nomu. That makes you much more powerful than we anticipated, quirkless child. No matter, for Nomu here was created to take on 100% of All Might's power!"

"100% of what All Might could do huh? Well I started heading here like 5 minutes after him and it doesn't look like he's made it yet."

"Kurogiri, who is this one?"

"I-I don't know. I've never seen him before."

"I get that a lot. I don't go waiting for the cameras to start rolling. Anyways, is he stronger than those guys?" Saitama pointed a thumb over his shoulder to the 20 villains who were standing a minute ago. "Yeah, they might be in comas for a while. Don't worry, it's never lasted over a week."

"Whoever he is, he's a threat." The smoke embodied voice wasn't one to waste time.

"Alright then. Nomu, give that bald one a test."

In the blink of an eye, the beast was towering over the man. Speaking of blinking, he didn't even do that. With a giant uppercut, the Nomu sent Saitama flying through the roof.

"Nooooo!" cried Deku.

"It seems he wasn't worth our time, I apologise," stated this 'Kurogiri'.

"Who?"

Everyone looked up in astonishment to see Saitama standing on the roof without as much as a scratch. He jumped down, landing effortlessly. Everyone's jaws were hanging excepting himself and the emotionless Nomu.

"Your dead eyes remind me of someone." He clenched his fist, his eyes taking a more angular shape. "I didn't like him."

With one punch, the Nomu was sent flying a few dozen meters away. Everyone was shaking now, bad guys and good guys alike. Though each for different reasons.

"Who is this guy? Looks like a new boss. Nomu! Show no mercy for this baldy!"

Nomu dashed at him, but Saitama dodged, smirking.

"So you survived my punch, huh? You're the first in years if I'm being honest. Let's see if you can handle THIS!"

Saitama just about teleported to exactly where the Nomu was, punching him a little more earnestly. Chunks of the once Nomu were sent flying about, most landing on the floor, but one piece landed on the arm the guy with hands all over. He looked at it, his utter terror showing even through the hand on his face.

"Kurogiri! Get us out of here!"

"Right away!"

Portals let the 2 of them slip through to who knows where. No one's reaction was to follow, and the portals disappeared as fast as they had come.

"Daaaaammmniiiitt!!!!" yelled Saitama at the top of his lungs.

"I know they got away, but you still saved us!" Deku offered to comfort his sensei.

"He really got me excited for a real challenge!"

"Uh, aren't you kinda mad about the wrong thing?" Jiro questioned.

"Do not worry children! For I am he—... You took them all out?" All Might had arrived.

"You're... a little late..." Momo commented, looking at the shred of the Nomu in front of her.

"I see. Young Saitama! I'm sorry, I forgot about our meeting today! Thank you for saving my students!"

"Meeting?" Deku questioned.

"Yes! Your sensei made an appointment with me yesterday. I hadn't seen him yet." Turning to Saitama, he asked, "So, what was it about?"

"We can talk about it in a second. Shouldn't we check everyone's safe first?"

"Ah yes! I thought everyone had been saved. It seems you still have some things to learn."

"I think he means check up on all of us he got out," mentioned Ojiro.

All Might sweat dropped. "Right, of course."

After everyone was checked up on and the other heroes and the cops all showed up, things were much more calm.

"So, All Might?" Saitama tried to get his attention.

"Ah, yes. Would you like to speak now?"

"Yeah. So I'm sure you know I'm an unlicensed hero—"

"Yes, and while not illegal since you don't have a quirk you should really—"

"I wanna get my license. If not for me, for Midoriya." The 2 watched their common student talk to his friends.

"That is very wise and noble of you."

"Yeah, anyways. I need you to train me."

The pro seemed taken aback by this. "I'm not sure what I could teach yo—"

"I need to learn how to pull back my punches. I either have my death punch, a stronger death punch, or the one where I actually aim to kill them. I didn't use the third one there to take out that weird creature."

"I heard it was intended to take on my 100%"

"I know you don't believe me—"

"You're stronger than me. You're stronger as well. Heck, you're a better mentor."

"About that, if you train me, Midoriya's gonna know and he'll start respecting you more. He told me about your offer, and your... how you look. He told me everything. I know you meant what you said, and I want him to get that power... His results aren't coming to him the same way mine did. I'm scared he can't get the same power as me for whatever reason. With O.F.A. he could surpass me. Huh, that sounds fun actually." He had a big smirk on at that thought. "So together we bring his powers to new heights." Saitama reached out a hand.

"And make his dream of being the number one hero a reality." All Might took his hand and the 2 shook in agreement.

You know kid, you've really changed me. It took 3 years for me to become this depressed emotionless person. Sure, you started me off with annoyance, not exactly my favourite emotion, but that was just the beginning. You showed me through your struggles where I once was. I haven't gotten a hold of all my emotions, but the fact that I can feel them let's me know I'm still living. Saitama's irises begin to grow, only a bit, but you can see a fire of passion burning in them.

And scene. I hope you all enjoyed this chapter, it's a little different in writing style. I kinda rely on you knowing whose thoughts the italics are. I like the change in pace, lemme know if you do too in a review!

Don't worry about me skipping the battle trial, I'm not. This chapter was just heavily Saitama centric since he is so important and he didn't get any time whatsoever the last part.

Deku is still the lead character! Saitama is just another important character, on the All Might level, but All Might isn't in every episode. Deku is always there because it's ultimately his story. I can try building more mini arcs and original filler that takes our eyes off of him once in a blue moon, but he is the most important.

Actually on the note of original filler, I'd like some ideas. Write a review if you have an idea, or even PM me. Even vague ideas, I'll add my creative flare and there could be a whole chapter on an idea you came up with!

Favourite and follow if you've enjoyed anything so far.

Ask questions or leave opinions in the form of a review as well. If you don't like the story but like the thesis, let me know how I can improve it.

How do you think Saitama's training to hold back punches changes things? And when he's a hero, what will change? Will he use those business skills of his past to open his own hero firm? Let me know what you think.

Any form of helpful or even just kind review whatsoever is highly appreciated and taken to heart deeply.