Of course, none of that really mattered. What did matter was the nearly undisguised hostility radiating from Flashy Flash—it was obvious he wasn't here for a friendly visit.
To be honest, Kizaru wasn't particularly bothered by others harboring hostility toward him.
After all, he wasn't some stunning beauty or made of gold—there was no reason to expect everyone to like him.
But that didn't mean Kizaru was the kind to tolerate provocation lightly.
Especially not from someone like Flashy Flash, who showed up uninvited and with no real reason. Kizaru had no problem teaching him a lesson.
"How arrogant… A newcomer who doesn't even recognize his seniors?"
Flashy Flash spoke coldly and expressionlessly.
He wasn't the type to bully others or abuse his strength. And since Swift Flash was now ranked above him as the 9th S-Class hero, while he himself was 14th, this couldn't even be considered picking on someone weaker.
He'd let everyone see for themselves—only the true fastest in the Hero Association deserved the title of "Flash."
"Sir, that's S-Class Rank 14—Flashy Flash. He's incredibly strong, and his speed is especially terrifying. He's a really tough opponent…"
One of the Blizzard Group members carefully informed Kizaru, clearly worried a clash between two S-Class heroes was imminent.
"Oh, it's old Fourteen, huh? Can't count, can you? I'm Ninth, you're Fourteenth—who's the senior here?"
Kizaru let out a dismissive laugh. If Flashy Flash had just shown a little respect, Kizaru might've humored him for a chat, seeing as they were both part of the Hero Association.
But this guy had clearly come looking for trouble—so he couldn't blame Kizaru for returning the favor.
"You arrogant fool! I'll show you just how ridiculous that so-called code name the Association gave you really is. Time for you to witness what true speed looks like!"
The moment the words left his mouth, Flashy Flash vanished from sight. Even Fubuki, who had been closely watching, couldn't track his movement.
Only a few heroes with exceptional eyesight managed to barely catch a glimpse of a blurry afterimage streaking toward Kizaru.
As the former fastest hero in the Association, Flashy Flash had every reason to be confident in his speed. Even without going all out, he was already moving faster than most heroes could even react to.
However, just as he reappeared behind Kizaru—intending to teach this arrogant newcomer a lesson—he struck nothing but air.
"Oh? You may begin your performance now…"
Kizaru's voice suddenly rang out from behind him—still with that ever-casual tone, a chilled drink hanging from his mouth, and an expression that hadn't changed a bit.
To be honest, Flashy Flash wasn't slow. But trying to compare himself to Kizaru, someone whose speed rivaled light itself? That was just wishful thinking.
"Wind Blade Kick!"
Hearing the voice from behind, Flashy Flash's expression shifted slightly, and without turning around, he launched a vicious spinning kick.
Though it was just a simple strike, it carried such precision and force that it seemed capable of slicing off a man's head.
Even ignoring his incredible speed, Flashy Flash was a close-combat master in his own right.
Back during his final exam in the ninja village, he single-handedly slaughtered every instructor, staff member, classmate, and related personnel—eliminating the village's dark legacy at the root.
That was why his class, the 44th generation, came to be known as the "Final 44." It was also the last class the ninja village ever trained.
Shhk!
And yet, that kick—capable of slicing through steel—missed again. Kizaru simply took a casual half-step back, effortlessly avoiding the attack.
Unless someone had Observation Haki superior to Kizaru's—borderline omniscient in battle—even the most advanced martial arts wouldn't mean much. Especially not against someone whose reflexes surpassed lightning and whose speed rivaled light.
"That's it?"
Kizaru muttered lightly, as if genuinely confused that an S-Class hero had nothing better to offer.
"Shadow Step Kick!"
Flashy Flash's expression darkened as he dragged his right leg in a strange arc, striking again—this time aiming for Kizaru's chest.
Given their height difference, aiming any higher wasn't really an option.
Unfortunately, just like the last time, Kizaru dodged it with an almost otherworldly movement.
If the first exchange had shown Kizaru's superior speed, then this one showcased his exceptional martial skill.
Every single one of Flashy Flash's moves had been completely within Kizaru's expectations. He hadn't even needed to use Observation Haki—he was toying with the proud swordsman as if it were nothing.
With two strikes dodged—and counting the first surprise grab that failed—Flashy Flash had now missed Kizaru three times in a row.
"Now I'm getting serious!"
Flashy Flash stared deeply at Kizaru. As arrogant as he was by nature, even he had now fully realized—Kizaru was far from an opponent that could be dealt with easily.
With barely a moment's hesitation, Flashy Flash drew the sword at his waist, ready to unleash his true strength.
He simply couldn't tolerate the fact that someone might be faster than him. Only he knew how brutal his training had been—eleven years in the ninja village, followed by nine more after leaving it.
All of it for one goal: to become faster. Stronger.
"Oh?"
Kizaru still showed no signs of getting serious. His face, no less handsome than Flashy Flash's—perhaps even more so—remained unchanged.
If it were Tatsumaki standing there, Kizaru might've actually been interested. But this guy? Not even close.
"Heavy Flash Slash!"
Flashy Flash's speed skyrocketed—several times faster than before. Moments ago, some of the watching heroes could at least catch glimpses of his movements. Now, not even a blur remained.
Though his swordsmanship wasn't quite on par with Atomic Samurai, Flashy Flash had once been the fastest hero in the Association. Countless monsters had fallen under his blade.
His lightning-fast thrust pierced straight through Kizaru's body—only for Flashy Flash to realize, upon closer look, that it was just an afterimage.
His eyes widened involuntarily—and at that exact moment, a light tap on his shoulder.
Kizaru had somehow reappeared behind him.
"Flash Slash!"
Startled and furious, the former speed king spun around instantly.
The sword in his hand, driven by speed that surpassed the limits of human ability, became a flurry of blinding slashes—aimed to obliterate everything behind him.
This attack was lethal—even for a Dragon-level monster. With this kind of god-speed technique, Flashy Flash could easily rank among the top five S-Class heroes.
And yet, he missed again.
This time, Kizaru didn't even retreat. Instead, he avoided every single slash at impossible angles—his body gliding through the chaos as if he already knew exactly where every attack would land.
Fast. Unbelievably fast.
Flashy Flash was stunned. He had pushed his speed to its peak, yet he still couldn't even touch the hem of Kizaru's coat.
The speed and swordsmanship he once took pride in now felt utterly powerless in the face of this new speedster.
"If you're done playing around, then it's my turn now, yeah?"
Kizaru calmly reached out his hand. Just as Flashy Flash finally snapped out of his daze and attempted to leap away—
—it was already too late.
Even though he retreated at top speed, Kizaru still caught up.
With just one finger—he flicked Flashy Flash square on the forehead.
And with that single flick, the S-Class Rank 14 hero was launched through the air.
Kizaru hadn't used any real force. Given that Flashy Flash was just a fellow hero, not someone reckless and antagonistic like Sweet Mask, Kizaru saw no reason to go all out.
Boom!
Even so, Flashy Flash slammed into a nearby short wall used for obstacle training. The concrete wall, reinforced with steel bars, cracked open from the impact.
Thankfully, S-Class heroes were built tough—even speed-based ones like Flashy Flash had far greater durability than your average A-Class hero.
Watching this, the surrounding heroes couldn't help but widen their eyes. The clash had happened so fast—they couldn't even see what transpired.
And yet, the result was crystal clear…
Flashy Flash had been thoroughly outclassed. He hit that concrete block so hard it cracked, and just watching it made others wince in sympathy.
"No wonder he's S-Class Rank 9! Took down both the A-Class No.1 and the S-Class Rank 14 with ease…"
"So this is what true S-Class power looks like… That speed was insane!"
"The former fastest hero and the new fastest—there's no doubt who came out on top…"
…
The crowd whispered among themselves. Even those heroes who had just staggered across the finish line, panting too hard to speak, couldn't help but look over at Kizaru and Flashy Flash.
"Cough… How… how did you do that? That kind of speed… how can a human move that fast?"
Flashy Flash struggled to get back on his feet.
His metal-armored bodysuit trembled slightly. The sharp pain in his body didn't stop him from focusing on the one thing on his mind—speed.
To Flashy Flash, his speed was basically the definition of human limits. Unless it was that bald guy who had broken his limiter, no human should be faster than him.
In fact, in many ways, Flashy Flash had already gone beyond the peak of what should be humanly possible. With overwhelming talent and two decades of relentless training, at age twenty-five—his physical prime—no one should've been able to outrun him.
And yet… here he was, utterly crushed in speed by this new "Swift Flash." Even in his wildest dreams, Flashy Flash could never have imagined such absurd speed existed.
"That speed just now? It was alright, I guess. Around the level I had when I was… sixteen,"
Kizaru said casually.
Before he even finished speaking, he vanished without a sound—and reappeared directly in front of Flashy Flash. His voice echoed after the fact, catching up only after he had already moved.
Just a few dozen meters—and Kizaru had crossed the distance faster than ten times the speed of sound. Even Flashy Flash hadn't seen it happen.
Only someone like Flashy Flash—who had devoted himself entirely to mastering speed—could understand just how insane that really was.
This wasn't just a battle between strong and stronger.
This was the limit of speed… being shattered by something beyond.
Kizaru knew exactly how the other man felt. He had encountered many opponents like Flashy Flash on his path to the top.
All he could do was pat him on the shoulder. This one had come to pick a fight, sure—but unlike Sweet Mask, he wasn't looking to die. No reason to be too harsh.
"…I'd like to apply to join your training camp."
Kizaru blinked. That, he hadn't expected.
Just as he was getting ready to send this would-be challenger on his way, Flashy Flash sheathed his sword and spoke seriously.
The man who once thought he had touched the ceiling of human speed now realized… he'd been staring at the sky from the bottom of a well. Kizaru's speed wasn't just faster—it dwarfed his own.
It was clear now: Kizaru was the rightful fastest man in the Hero Association. Only he deserved the title of "Flash."
Flashy Flash wasn't someone who couldn't accept defeat. If anything, losing made things more interesting. It meant there was still room for him to grow.
And right now, Kizaru was the best teacher he could ask for.
"You serious? My training camp's not gonna teach you how to go faster. Those guys in there already learned everything it has to offer—and they still couldn't touch you."
Kizaru raised an eyebrow. For a true powerhouse, even the Navy's "Six Styles" were just icing on the cake.
Even if Flashy Flash mastered them, it wouldn't make much difference to someone already at his level.
"Yes. Please let me join,"
Flashy Flash said with quiet determination. After witnessing true god-speed firsthand, he had made up his mind.
Even if the camp wasn't helpful, he could still observe Kizaru up close and maybe pick up something deeper.
"Suit yourself then. Start with the others—go run twenty… no, make that fifty laps around the track."
Kizaru didn't really care either way. With Sweet Mask booted out earlier, a spot had just opened up anyway.
"Fifty laps? Understood."
Flashy Flash glanced at the track and strode toward the group of training heroes without hesitation.
Two hundred kilometers meant nothing to him. He didn't know what purpose this running served—but since it was Kizaru's instruction, he was willing to give it a shot.
"Wait, wait… is this for real? Flashy Flash is gonna train with us??"
Ranked 7th among the A-Class, Magic Trickster was in disbelief.
Until now—aside from Blue Flame—he'd always been second place in the training camp.
Forget about those B-Class nobodies—even most A-Class heroes didn't earn his respect.
But now… even an S-Class hero had voluntarily joined the training camp?
He felt a mix of absurdity and overwhelming pressure.
That was one of the top-tier elites—the exalted S-Class—and he had silently stepped onto the track to start running laps. Even more shocking: he began after everyone else had nearly finished, and still planned to run all fifty laps from the start!
Many A and B-Class heroes were quietly waiting to see Flashy Flash embarrass himself.
Even if he was an S-Class, after a fight like that, there was no way he could immediately run over 200 kilometers. It just didn't seem humanly possible.
But very quickly, the smirks on their faces froze.
From surprise to shock, from shock to outright fear.
On the nearly five-kilometer loop track, Flashy Flash moved like a howling gale, lapping it in less than a minute each time.
Compared to Kizaru's speed earlier—where even his afterimages were hard to perceive—Flashy Flash hadn't even broken the sound barrier now. But at over 100 meters per second, his movements were fast, steady, and consistent.
And yet—lap after lap—fifteen minutes later, he had already completed twenty.
Meanwhile, the slowest runners—Mumen Rider and Mountain Ape—still had one lap left to go before finishing.
"He's so fast! Insanely fast! That guy's basically a monster!"
Magic Trickster couldn't hold it in and blurted to his friend nearby.
He already knew S-Class heroes were on another level—but seeing it with his own eyes felt like a heavy blow.
He himself specialized in speed. Maybe Blue Flame had him beat in long-distance, but in short bursts, Magic Trickster always thought he had the edge.
But now? Watching Flashy Flash maintain that kind of average speed over hundreds of kilometers...
It completely broke him. His confidence shattered.
"So this is what an S-Class hero is like…"
Blue Flame let out a long breath. The feeling in his heart was hard to put into words.
When he watched Flashy Flash get absolutely destroyed by Kizaru earlier, even though he knew it was because the man was too strong, he still instinctively looked down on Flashy Flash a bit.
But now, comparing his own previous performance with what Flashy Flash was doing, he finally understood:
Why he was only an A-Class hero.
"See that? That's an S-Class hero! If you join the Blizzard Group, I promise you'll have regular access to Swift Flash's training. And that's not all—there's a huge surprise waiting for you too…"
Riding the momentum of Flashy Flash's performance, Blizzard immediately tried to persuade Captain Mizuki to join her group.
"Swift Flash-senpai joined the Blizzard Group too?"
Captain Mizuki asked curiously.
This was her first time seeing a battle between S-Class heroes. Even the defeated Flashy Flash had displayed power far beyond her imagination.
If he was part of the Blizzard Group… then maybe she should join too!
"He's still thinking about it, but I'm sure it won't be long before Kiz—cough, I mean, Swift Flash accepts the invitation!"
Blizzard covered her little slip, but her mind was made up.
No matter what, she had to bring Kizaru into her group.
If the Blizzard Group had Kizaru as their poster boy, getting new recruits would be a breeze.
Even S-Class heroes are joining—what are you waiting for?
"Umm… okay then! I'll join too!"
Captain Mizuki tilted her head and nodded enthusiastically.
Her thought process was simple. Swift Flash was strong and trustworthy, and Miss Blizzard seemed genuinely welcoming.
Besides, the Blizzard Group had a good reputation. Joining didn't sound bad at all.
"Welcome aboard! You're officially a member of the Blizzard Group!"
Blizzard beamed, already itching to take Captain Mizuki to her walk-in closet to share her beloved designer heels and handbags.
This was someone even Kizaru acknowledged as a promising newcomer.
She had to find a way to get him to personally give Mizuki some extra guidance.
After all, if other heroes got stronger, it didn't benefit the Blizzard Group much.
But Captain Mizuki was one of their own.
While Blizzard was busy recruiting, Mumen Rider and Mountain Ape were finally less than 100 meters from the finish line.
"You can do it! Come on, almost there!"
Feathersnake giggled as she followed along behind. She was one of the few giant serpents from Ryuchi Cavern who didn't treat humans as food.
Rather than eating Mumen Rider and Mountain Ape, she was far more curious to see if they could actually finish.
"…Hold on… just a bit more…"
Mumen Rider's vision was blurry. Every breath felt like it was ticking down a timer. His body had long since hit its limit.
And yet, by sheer force of will—he kept moving toward the finish line.
It was painfully slow.
The last two kilometers had taken the pair over half an hour to cover.
"…Damn it… stop chasing us already…"
Mountain Ape panted heavily. His physical endurance was far better than Mumen Rider's, but his body type just wasn't built for running.
Having Mumen Rider chase him all the way here, he'd reached his own limit too.
"Eeeep! You guys better hurry—'cause that new guy? He's almost done with his fifty laps and about to catch up!"
Feathersnake chimed in gleefully.
Just as the words left her mouth, Flashy Flash shot past Mumen Rider and Mountain Ape with a blank expression on his face.
He had just finished his 49th lap—only one more to complete the task Kizaru had assigned. And he'd done it all in under an hour.
This kind of speed and endurance made the gap between them and an S-Class hero painfully clear to everyone watching.
But to maintain an average of nearly 100 meters per second for over 200 kilometers… even for Flashy Flash, that was pushing his limit.
However, due to the harsh training he'd undergone since childhood, he knew how to pace himself and conserve energy.
So even now—at the final lap—his speed hadn't dropped noticeably from when he first started.
Though Mumen Rider and Mountain Ape had given it their all, they were still a few beats too slow—forced to watch helplessly as Flashy Flash blazed by like a hurricane.
"Forty-three minutes and twenty-seven seconds… So this is the power of an S-Class hero?"
"Fifty laps! Over 200 kilometers… and he did it in less than an hour?!"
"If only we had that kind of speed…"
Around the finish line, the other heroes were frozen in awe.
Some even tried to strike up conversation with Flashy Flash, but the S-Class hero ignored them completely.
Having completed the entire run, he walked straight toward Kizaru, who was lounging on a beach chair.
"What's the next part of the training?"
Flashy Flash asked, unbothered by the fact that Kizaru had been sipping cold drinks under the sun while he was running the entire time.
At this moment, all he wanted was to understand how Swift Kizaru had surpassed the limits of the human body and entered the realm of true god-speed.
"Hmm? Oh, you're done? That was pretty quick… Anyway, isn't it almost lunchtime?"
Kizaru replied nonchalantly, glancing toward the track.
Seeing that Mumen Rider and Mountain Ape had also made it to the finish line with Feathersnake 'escorting' them, he still didn't spare Flashy Flash a single look.
Instead, he turned to Blizzard and asked casually.
Even for heroes, running over 100 kilometers had taken up the whole morning.
While the Rokushiki training was meant to push human potential, someone like Mumen Rider or Mountain Ape—already on the verge of collapse—wouldn't get much more out of further drills right now.
Most of the others weren't much better off.
Aside from Flashy Flash and Captain Mizuki, the number of heroes who still had any stamina left was in the single digits.
Kizaru had already pretty much gauged everyone's physical limits.
Now they could finally begin the real training.
But before that, it was best to give everyone a bit of time to recover.
"I've already sent some members to prepare lunch—it should be here soon."
Blizzard nodded, a bit heartbroken as she said it.
These heroes were massive eaters.
With 50 campers and 30 Blizzard Group members, a single meal could eat up nearly half a month's budget.
Luckily, with Kizaru as the big spender sponsoring everything, Blizzard could afford it.
Otherwise, feeding the training camp would've been impossible.
"Mm… then let's just settle for whatever's ready."
Kizaru wasn't picky—he loved gourmet meals made by top-tier chefs, but he was also happy to sit in the Navy mess hall gnawing on stale bread and salty meat, joking with the rank-and-file about how terrible the cooks were.
This attitude often earned criticism from Navy higher-ups, but Kizaru had always done things his own way.
Eventually, he even became the most beloved admiral among the lower ranks.
"I don't need lunch. Just tell me what the next part of the training is."
Flashy Flash frowned slightly.
After witnessing Kizaru's strength, he was desperate to improve—so desperate that he didn't want to waste even a second.
"…Wait a sec."
Kizaru raised an eyebrow and calmly opened up a dimension-chat interface that only Blizzard—also a member of the same group chat—could see.
---
[Kizaru]: @Orochimaru, you there? Do you still have some of those wristbands that you gave that other guy?
[Random Guy Who Wants to Cling to Luo Feng's Leg]: Lord Kizaru needs chakra-weighted wristbands? If Orochimaru's out, I can lend you a set first.
[Kizaru]: Let's see if Orochimaru's still got stock. If not, I'll borrow from you.
[Orochimaru]: I've got them. They're quite popular among the ninjas in the village. I had the Sealing Team make extra.
[Kizaru]: Send me two sets for now—I'll put them to good use. Also, reserve another hundred sets and get them delivered ASAP.
[Random Guy Who Wants to Cling to Luo Feng's Leg]: What are you gonna do with so many wristbands? With your strength, even wearing a dozen of them won't help much.
[Blizzard]: They're not for him. He's running a training camp in my world…
Blizzard noticed Kizaru suddenly go silent.
Instinctively, she opened the chat group—and sure enough, he was messaging someone inside.
When Random Guy asked what was going on, she briefly explained what Kizaru had been doing since arriving in the One Punch world.
---
[Random Guy Who Wants to Cling to Luo Feng's Leg]: Whoa, I'm so jealous. Getting training from Lord Kizaru himself…
[Jotaro Kujo]: A hero who fights to protect civilians, huh. That's not bad.
[Kobayashi]: Waaah~ Jotaro-san actually spoke? That's so rare!
[Ai Haibara]: It is. This guy usually doesn't talk—just as quiet as that old man.
[Xiao Mei]: Old man? Who are you talking about?
[Random Guy Who Wants to Cling to Luo Feng's Leg]: She means Master Zhang Sanfeng. @MasterZhangSanfeng hasn't spoken in a while either.
[Zhang Sanfeng]: I was just about to say something, young ones. In three days, this old Taoist will celebrate his 100th birthday. If any of you are free, feel free to stop by for a chat.
[Kobayashi]: Whoa! I'm definitely coming, Grandpa!
[Random Guy Who Wants to Cling to Luo Feng's Leg]: Me too! I wanna come!
[Ai Haibara]: If I'm free by then, count me in.
[Kizaru]: A hundred years, huh… Pretty impressive~
[Tony Stark]: Hey, what's everyone chatting about? A birthday bash for someone turning 100? Whoa—now that sounds awesome.
[Kizaru]: You guys keep chatting. I've got a bit of business to take care of here.
---
Seeing Kizaru suddenly zone out mid-conversation, Flashy Flash couldn't help but frown slightly.
With his personality, he couldn't stand people losing focus during a conversation—but this was Kizaru, Godspeed incarnate. No matter how annoyed he was, he couldn't say anything.
"Put this on."
Just then, Kizaru suddenly held out two wristbands and casually tossed one over to Flashy Flash.
The band had a dark, almost black surface engraved with strange runes, and it was noticeably heavier than a typical wristband—though for an S-Class hero, it wasn't anything significant.
"Weight training? Something like this... huh?"
Flashy Flash slipped the band on without concern.
This level of resistance? Might as well just strap on a sandbag.
But the moment both bands locked onto his wrists—his expression subtly shifted.
Though the bands didn't feel especially heavy on his arms, his entire body suddenly felt incredibly weighed down.
Even the air around him seemed thicker, sticky—every movement now sapped energy like he was trudging through molasses.
°°°
A/N: 4.2k words, to make up for not posting yesterday. I have an insane fever, lol, 40°c
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