[Narihana Kaminari's POV - Hero Agency Training Room]
I adjusted my hero costume—a sleek bodysuit in shades of blue and silver with lightning bolt patterns crackling down the sides—and looked across the reinforced training room at my son.
Denki stood on the opposite side, wearing the special friction-resistant gym wear I'd commissioned specifically for this day. The material was designed to withstand the intense heat generated by high-speed movement, with built-in cooling systems and reinforced stitching that wouldn't tear under stress.
'He looks so grown up,' I thought, feeling that familiar mixture of pride and slight melancholy that all parents feel when they realize their child isn't a child anymore.
It had been only a few minutes since we'd started this training session. But it felt like hours.
'That's what happens when you fight someone with super speed,' I mused, blue lightning beginning to crackle around my body. 'Time gets weird and every second feels like ten.'
My son called himself a "Speedster"—whatever that meant. Some reference from those American comics he read sometimes, probably.
But watching him move? The name fit.
I launched my attack—Lightning Discharge—and blue lightning bolts erupted from my body in a coordinated barrage, filling the training room with crackling energy.
Denki dodged. Not just dodged—danced through the attacks like they were moving in slow motion.
A yellow aura surrounded his entire body, electricity crackling across his skin in brilliant arcs. He'd created this technique himself, refined it over years of solo training before finally showing it to me.
'Raijin Drive,' I recalled him explaining. 'Named after the Shinto god of thunder. It supercharges my entire nervous system, increases my physical abilities, and gives me both high scale offensive speed and defensive capabilities.'
'Pretty impressive for a teenager,' I'd thought at the time. 'But then again, he's my son. Of course he's impressive.'
I smiled despite the intensity of our sparring match and increased my attack output.
More lightning with faster strikes from different angles.
But Denki seemed to predict each attack pattern, his body moving before my lightning even reached where he'd been standing.
'His reaction time is incredible,' I observed with professional detachment even as maternal pride swelled in my chest. 'Even though my Lightning Discharge isn't at the actual speed of a natural thunderstorm, it's still incredibly fast—faster than most heroes can track. And he's dodging like he's bored.'
'He got everything from me,' I thought smugly. 'His Quirk—which is basically an upgraded version of mine, got his handsome looks from me, of course as Kenjin isn't this handsome when he was young. His natural talent with electricity is beyond mine with lightning and He's so cool when he focuses his eyes.'
I remembered when he was younger, maybe six or seven, and he'd invented that breathing technique seemingly out of nowhere. Thunder Breathing, he'd called it—a method of controlling your breath to maximize oxygen intake and enhance physical performance.
'Simple movements,' I'd thought when he first taught it to me. 'How can something so simple increase my power output by 30 to 40 percent?'
But it had worked and it still worked. Every time I used Thunder Breathing during hero work, I felt faster, stronger and more controlled.
'My genius son,' I thought warmly.
And then there was his "Whey Mode"—that adorable state where his brain short-circuited and he became a drooling, thumb-raising mess for a few minutes.
'So, Kawaii.'
I'd saved that video in five different drives. My personal phone, computer, cloud storage, my hero agency's secure servers and my backup cloud storage. And I'd shared it with everyone I knew. Other heroes, agency staff, friends and family. That one barista who made good coffee.
'Everyone deserves to see how adorable my son is,' I'd reasoned.
Lost in my thoughts of maternal pride, I almost didn't register when Denki spoke.
"Is this the best you can do, Kaa-san?" His voice carried across the training room, casual and slightly mocking. "It seems the hero name 'Lightning Strike' isn't true to its name."
My eye twitched. 'He inherited his sarcastic personality from Kenji,' I thought, recognizing my husband's influence in that tone. 'Well, nothing a beating from Mom can't fix.'
I grinned—not a friendly smile, but the kind of expression that made villain's survival instincts start screaming. "We haven't even started yet, Denki-kun."
I channeled lightning directly into my feet and launched myself forward.
This technique had taken years to master. When you're moving at near-supersonic speeds, you have to predict your trajectory perfectly, calculate when to stop, account for momentum and inertia. One mistake and you'd crash into a wall at lethal velocity.
'But I'm good at this,' I thought with professional pride. 'Very good and good enough that my entire hero name is based on this move.'
'Strike like lightning—fast and deadly.'
I became a blur of blue lightning, crossing the distance between us in a fraction of a second.
Denki also moved and to anyone watching from outside, we probably looked like streaks of colored light—blue and yellow electricity clashing and separating and clashing again at speeds that made normal perception meaningless.
'He's faster than me,' I realized with a mixture of shock and pride. 'Significantly faster. And he can predict my attack patterns too.'
Denki didn't attack immediately. He was studying me, analyzing, looking for openings.
'Smart,' I thought. 'He knows his electricity doesn't work on me because of my complete immunity. So he's looking for other ways to win.'
I decided to push him. "Is running all you can do?" I taunted while channeling more lightning into my movements.
His yellow aura intensified, electricity crackling more violently across his body. "I think I've got where I stand now," he said and then vanished.
Even with my enhanced perception, I barely registered the movement.
One moment he was across the room. The next—WHAM.
His fist connected with my stomach with the force of a small explosion.
'When did he—'
The impact drove the air from my lungs and sent me flying backward.
But before I could hit the wall, Denki appeared behind me and delivered a devastating kick to my back that sent me crashing down toward the floor.
'He's using his speed to build momentum,' I realized even through the pain. 'Converting velocity into kinetic force. And his body is withstanding the stress because of Raijin Drive's defensive capabilities.'
'He said he got the idea from something called "Lightning Cloak" in an anime,' I recalled hazily. 'From a show called Naruto.'
It sounded crazy—was something like that even possible?
He struck me repeatedly while we were in midair, attacking from multiple angles and targeting points that sent waves of pain through my body, leaving me unable to move or react.
Then after taking a final kick from him, I hit the reinforced floor hard as the impact jarring my entire body. And I just... lay there for a moment... Defeated by my sixteen-year-old son after twenty years as a Pro Hero.
'I should feel humiliated,' I thought distantly. But instead, I felt proud.
Denki appeared beside me instantly, his cocky expression replaced by genuine concern. "Kaa-san! Are you okay? Did I hit too hard? I'm sorry, I—"
I smiled and pulled him into a tight hug, his head naturally falling between my breasts.
"Mommy is fine, Denki-kun," I said softly, stroking his hair. "She's just proud of you."
I felt his body immediately relax in my embrace.
'He's had this thing since childhood,' I remembered fondly. 'Relaxing when I hug him like this. Even falling asleep sometimes. We didn't have many moments like this when he was younger—I was always working—but he's been trying to spend more time with us recently.'
'I promise you, Denki-kun,' I resolved silently while holding him tighter. 'I'll protect you, support you and I'll watch you become the amazing hero you're meant to be.'
...
[Denki's POV - A Few Moments Later]
I did not want to talk about how that training match ended.
Let's just say there are some things a sixteen-year-old guy should never experience, and "face-planted into your mother's chest after winning a fight" is definitely on that list.
Yeah, I'm the kind of guy who prefers big boobs—and, admittedly, feels way too comfortable when my face ends up buried between them.
'It's awesome,' I thought, deliberately pushing the memory aside. 'But let's never speak of this again.'
But I could talk about what I'd learned from the match.
I was strong, like, genuinely, legitimately strong. I should be at a Pro Hero level, at minimum.
'Maybe even higher than that,' I mused, reviewing the fight in my enhanced memory. 'Mom wasn't using her full strength and so was I—she was testing me, not trying to actually hurt me. But even accounting for that...'
I'd won against a Pro Hero with twenty years of experience.
That thought led to another one that had been nagging at me for a while now.
'Something doesn't add up,' I realized, sitting in the agency's waiting area while Mom changed out of her hero costume. 'My growth rate and my power level. It's... abnormal.'
I'd been pushing this thought aside for years, but it was becoming impossible to ignore. My Quirk—Electrification—wasn't supposed to work like this.
According to the original canon, it was a simple ability like generate electricity, store it in your body, discharge it at will. Limited capacity with significant drawbacks. The infamous "Whey Mode" when you overdid it.
'But here I am,' I thought while staring at my hands as yellow sparks danced across my fingertips. 'Moving at speeds that would make most speedster superheroes jealous. With techniques that shouldn't be possible with a mid-tier electrical Quirk.'
I thought back to when I was six years old, barely a year into my training. I'd run at approximately 241 kilometers per hour at six years old and that wa only after only one year of training.
'That's not normal,' I admitted to myself. 'That's not even remotely normal. Even accounting for my adult mind, my scientific knowledge, my training regimen... a child's body shouldn't be capable of that.'
'I have excellent control, studied incredibly hard and trained my ass off. But it still feels weird how everything just... worked.'
I sighed while running a hand through my blonde hair. 'Forget it. I'll deal with this crisis later. Right now, I'm fine with my power level. More than fine, actually.'
'I'm at Pro Hero level at sixteen. That's the important thing.'
A door opened, and Mom emerged in casual clothes, her lightning-blue hair still slightly damp from a quick shower.
"Ready, Denki-kun?" she asked with a smile.
"Ready for what?"
"Speed test, of course! You didn't think I'd let you show off like that without getting actual measurements, did you?"
She led me deeper into the agency building, down a hallway I'd never been in before, until we reached a door labeled "SPECIAL EQUIPMENT - AUTHORIZED PERSONNEL ONLY."
Inside was a woman I'd never met. She was short—maybe four and a half feet tall—with dark hair cut in a severe bob, wearing glasses that magnified her eyes slightly, and a lab coat that somehow looked both professional and eccentric at the same time.
She looked exactly like Edna Mode from The Incredibles. Like, exactly.
'Either this is the world's biggest coincidence,' I thought, 'or The Incredibles exists here and someone decided to cosplay as her full-time.'
"Edna!" Mom called cheerfully. "This is my son, Denki. Denki, this is Edna—she's the genius behind my hero costume and all the special equipment in this agency."
"Fascinating," Edna said while studying me with unsettling intensity. Her voice even sounded like the character. "I observed your fight before but a simple Electrification Quirk that produces the effects I just witnessed on the security feed. It's Intriguing."
"I trained really hard," I offered.
"Hmm." She didn't sound convinced. "Hard training doesn't account for molecular-level bioelectrical optimization and neural pathway reconstruction. But we'll discuss that later."
'She figured that out from just watching our fight?' I thought with alarm. 'Okay, definitely not underestimating her.'
"We're here for a speed test," Mom explained. "I want to know exactly how fast Denki can move."
Edna's eyes lit up with scientific enthusiasm. "Oh, wonderful! Follow me, follow me!"
She led us to another room—this one absolutely massive, with a circular track built across the room. The track was maybe a hundred meters in diameter, with sensors and measurement devices lining the walls.
'This looks like the training room from The Flash TV show,' I realized with growing excitement. 'The one where Barry runs in circles while the team measures his speed.'
"This," Edna announced proudly, "can measure velocity, acceleration, top speed, sustained speed, energy output, and approximately seventeen other metrics I won't bore you with. Simply run at your maximum capability, and the sensors will do the rest."
She gestured toward the track. "Whenever you're ready, young man."
I walked to the starting position, feeling electricity already beginning to hum through my nervous system.
'Finally,' I thought, unable to suppress a grin. 'Finally, I get to cut loose and it's time to see exactly how fast I am.'
Yellow electricity crackled in my eyes as I settled into a runner's stance.
"Start!" Edna called and I exploded forward.
The world became a blur of motion and color as I accelerated to maximum speed, running lap after lap around the circular track. From an outside perspective, I was probably just a streak of yellow lightning—impossible to track with normal human vision.
But from my perspective? The world had slowed to a crawl.
'Faster,' I thought while pushing harder. 'I can go faster.'
With more electricity and more speed.
I lost myself in the motion, in the pure joy of moving without restraint, without limitation.
I thought with fierce satisfaction, 'This is what it means to be fast.'
The yellow lightning around me intensified until the entire room was bathed in its glow. And I ran with excitement.
....
[Narihana Kaminari's POV - Speed Testing Facility]
Run, Denki, run.
The thought echoed in my mind as I watched the yellow streak of electricity blur around the circular track at speeds that made my eyes water just trying to follow.
The specialized insulation and safety measures built into this facility were working overtime—I could hear the telltale crack of sonic booms as Denki broke the sound barrier repeatedly, each one rattling the reinforced walls despite the dampening systems.
'He's so much faster than when he fought me,' I realized with a mixture of pride and—I'll admit it—a tiny bit of hurt. 'He was holding back during our sparring match.'
Beside me, Edna stood transfixed by the monitor arrays, her magnified eyes darting between multiple screens displaying velocity readings, energy output metrics, and dozens of other measurements I couldn't begin to interpret.
"Fascinating," she murmured while adjusting her glasses. "Absolutely fascinating."
The screens beeped and flashed with new data as Denki completed another lap.
"Are you certain," Edna asked slowly, her tone carrying scientific skepticism, "that his Quirk is as simple as Electrification? Because this—" she gestured at the cascading data, "—this does not add up. Not even remotely."
"What do you mean?" I asked while moving closer to look at the monitors.
Edna tapped one screen, highlighting specific readings. "Your son is currently moving at Mach 4. And based on these acceleration patterns, he's approaching Mach 5."
My eyes widened. "Mach 5?"
"Indeed." Edna's fingers flew across the keyboard, pulling up additional data streams. "To put that in perspective—Mach 5 is approximately 6,174 kilometers per hour. At that velocity, he could travel from Tokyo to Osaka in roughly three minutes."
She pulled up another display, this one showing cellular scans taken during Denki's initial entry into the facility.
"Now, here's what confounds me," Edna continued, her voice taking on that lecturer quality scientists get when discussing something that breaks their understanding of physics. "According to my preliminary bioscans, his Quirk is genuinely just Electrification. Simple electrical generation, storage, and discharge. Nothing that should theoretically enable sustained supersonic movement."
"Then how—"
"His cells," Edna interrupted while pulling up a microscopic view that looked like something from a biology textbook. "His cells are generating electricity at the molecular level—not just specialized organs or glands, but every single cell in his body has been restructured to function as a biological capacitor."
She zoomed in further, showing cellular structures that pulsed with faint electrical signatures.
"His nervous system has essentially become a superconductor. Neural signals travel at speeds that exceed normal human capability by several orders of magnitude. His muscle fibers have adapted to handle the stress of high speed movement through a process of continuous bioelectrical reinforcement—essentially, he's using electricity to strengthen his own tissues in real-time, preventing the catastrophic damage that velocity should cause."
Edna pulled up another chart, this one showing energy output calculations.
"And his total electrical capacity..." She paused, as if double-checking the numbers. "Based on these readings, your son could theoretically power the major cities in Japan—most of them—for several days without depleting his reserves."
The room fell silent except for the continued sonic booms from Denki's ongoing speed test.
"That's..." I struggled to find words. "That's incredible."
"That's impossible," Edna corrected. "Or it should be. Simple Electrification Quirks don't produce this level of output. The human body—even one enhanced by a Quirk—shouldn't be able to sustain these speeds without catastrophic structural failure."
She looked at me directly, her magnified eyes serious behind her glasses.
"Your son has somehow optimized his Quirk to a degree that defies conventional understanding. Whether through training, genetic anomaly, or some combination of factors... he's created something entirely new."
'My genius boy,' I thought while watching the yellow streak continue its tireless circuit. 'You really are something special, aren't you?'
...
[Five Months Later - Training Montage]
The following months passed in a blur of intensive training, testing, and preparation.
I had to accept a fact that I'd been somewhat in denial about, my son was a genius beyond what I'd given him credit for.
Not just smart—genius. The kind of intelligence that came along maybe once in a generation.
Denki and Edna had developed an almost disturbing rapport, frequently engaging in conversations filled with scientific terminology that went completely over my head.
"—if we adjust the bioelectrical frequency modulation to account for cellular resistance variance—"
"—then the energy efficiency ratio should increase by approximately 34 percent, yes—"
"—assuming standard deviation doesn't exceed acceptable parameters—"
I'd stopped trying to follow their discussions after the first week.
'As long as they're getting along,' I thought, watching them collaborate on some kind of training enhancement project. 'That's what matters.'
But Denki didn't limit his training to just solo work with Edna and me.
About three months in, he'd brought two of his friends to the agency.
Ashido Mina—a cheerful girl with pink skin and yellow eyes, whose Acid Quirk showed impressive versatility.
And Kirishima Eijiro—a red-haired boy with a Hardening Quirk and determination that reminded me of some of the best heroes I'd worked with.
"Kaa-san," Denki had asked, "would it be okay if Mina and Eijiro trained here sometimes? I know it's asking a lot, but—"
"Of course!" I'd interrupted, genuinely pleased. "Your friends are always welcome. Besides, it'll be good for you to train with peers, not just adults."
They were good kids. Polite, hardworking, and genuinely passionate about becoming heroes.
'Especially Mina-chan,' I thought with a knowing smile, watching how she and Denki interacted—the casual touches, the shared jokes, the way they seemed naturally comfortable in each other's space.
'I wouldn't mind at all if those two got along even better in the future,' I mused, already imagining potential scenarios.
Across the training room, Denki suddenly stumbled mid-conversation with Edna, his body trembling like a leaf caught in a strong wind.
"You okay, Denki-kun?" Edna asked with amusement in her tone.
"F-fine," he stammered, shooting suspicious glances around the room. "Just felt like someone was planning something terrible involving my future."
I smiled innocently and went back to reviewing training schedules. 'Nothing terrible, sweetie,' I thought. 'Just normal parental hopes and dreams.'
....
[Denki's POV - Six Months Later]
Six months passed with the most intensive training, again for me who grinded from five, it's normal.
I've been pushing my limits, developing new techniques, and working with Edna on projects that went far beyond simple hero preparation.
One project in particular had been occupying my thoughts... The Regeneration Cradle.
'Based on Helen Cho's technology from the Marvel Cinematic Universe,' I recalled, reviewing my mental notes on the concept. 'A device capable of accelerating cellular regeneration to unprecedented levels, potentially healing injuries that would normally be permanent.'
The theory was sound—I had extensive knowledge of human biology from both of my lives, combined with my current understanding of how Quirks interacted with biological systems.
But theory and practice were very different things.
'I'm not an expert in the mechanical engineering required to actually build this thing,' I admitted to myself. 'My knowledge is biological and electrical, not mechanical or computational.'
I'd discussed it with Edna, hoping her genius-level intellect might bridge the gap.
"Interesting concept," she'd said while studying my rough schematics. "Similar models exist in experimental medical technology, but nothing quite like what you're proposing. The level of precision required for cellular reconstruction would be... challenging."
She'd given me some pointers—suggestions for materials, ideas for power distribution, thoughts on how to integrate Quirk-based technology with conventional medical equipment.
But ultimately, she'd been honest, "This isn't my specialty, Denki-kun. Medical technology requires expertise I simply don't possess. You'd need someone who specializes in support equipment with medical applications."
'Which means I need to wait until I get to U.A.,' I'd concluded. 'And find Mei Hatsume and Recovery girl.'
The eccentric support course genius whose inventions ranged from brilliant to dangerously unstable and together with me and Recovery girl, this will be possible in the future.
'If anyone can help me build the Regeneration Cradle, it's her,' I thought. 'With her mechanical expertise and my biological knowledge, we could actually make this work. And if we succeed...'
'We could heal All Might and restore his damaged organs. Give him back the power he lost.'
'That would be the ultimate way to show respect to the Symbol of Peace. The man who even Hero killer Stain himself acknowledged as a true hero.'
But that was future planning. Right now, I had something far more immediate to focus on.
[Present Day - U.A. High School Entrance]
The day had finally arrived.
After years of training, planning, and preparation and countless hours pushing my limits and developing abilities that shouldn't be possible.
The U.A. entrance examination.
I stood with Mina and Eijiro at the base of the massive staircase leading up to U.A.'s main building, all three of us craning our necks to take in the sheer scale of the place.
"Holy crap," Eijiro breathed, his eyes wide with awe. "It's even bigger in person."
"It's amazing!" Mina bounced excitedly as her pink skin practically glowing in the morning sun. "We're really here! We're actually at U.A.!"
I couldn't help but smile at their enthusiasm, 'This is it, the start of canon and the beginning of everything I've been preparing for.'
Around us, hundreds of other applicants were streaming toward the entrance—some looking confident, others nervous, all of them carrying dreams of becoming heroes.
'How many of them will make it?' I wondered. 'How many will succeed in the exam? How many will end up in Class 1-A with us?'
'And how much am I going to change just by being here?'
The butterfly effect was real. My very presence had already altered things—I'd met Eijiro and Mina years before canon dictated, had trained them, had helped Eijiro overcome his self-doubt much earlier than in the original timeline.
'But the major plot points should still be the same,' I reassured myself. 'Izuku still got One For All—I saw that villain attack on the news. All Might is still the Symbol of Peace. The League of Villains is still forming, and I can work with this.'
"Come on, you two," I said aloud while starting up the stairs. "Let's not be late for our own entrance exam."
"Right behind you!" Mina called.
"Let's do this!" Eijiro pumped his fist enthusiastically.
Together, the three of us climbed the stairs toward U.A.'s entrance.
Toward our future and whatever destiny awaited us.
'Here we go,' I thought, feeling a wild grin spread across my face. 'Time to show this world what a Speedster can really do.'
We crossed the threshold into U.A. High School and the future changed forever.
...
[Meanwhile - Nighteye Hero Agency]
Sir Nighteye sat at his desk with his fingers steepled in front of his face, his expression uncharacteristically grave.
Across from him, Bubble Girl stood holding a stack of case files, "Sir?" she asked carefully. "What's wrong? You've been staring at that prediction report for twenty minutes."
Nighteye didn't respond immediately.
His Quirk, Foresight, allowed him to see the future of anyone he touched and made eye contact with—a complete, detailed vision of their fate stretching hours, days, sometimes weeks into the future.
It was infallible and absolute... Or it was supposed to be.
"The future..." Nighteye said slowly, his voice carrying a tremor that Bubble Girl had never heard before. "The future... has been changed."