Chapter Text
“IF I CAN’T SAVE ONE SMALL CHILD IN FRONT OF ME, WHO NEEDS MY HELP,”
Izuku’s kicked into the air behind him, his 100% full cowling causing him to rocket forward. He didn’t even feel the pain that shattering his legs that much caused, due to Eri on his back.
“HOW CAN I BECOME… A HERO WHO SAVES EVERYONE?!”
Time seemed to slow down as he forced his body to move as fast as it could, throwing punch after punch at Chisaki. The world around him flared with green light, the energy flowing off of him like fire.
The sound of rushing air and the impacts he made reached his ears as time seemed to speed up again, allowing Izuku to see the damage he did to Chisaki.
The villain’s monstrous body was torn apart, with massive holes dotting what remained. He heard Eri whimper on his back, and felt the pressure being put on him by her Quirk increase.
He saw Chisaki pull himself back together with the remaining material, now smaller, but with all his limbs. The man swung his massive arm at Izuku, and he swatted it away, minuscule pieces of the limb flying off into the distance.
Izuku pressed forward again, moving so fast it almost looked like he was teleporting. In an instant, he was in Chisaki’s face, slamming his fist into the man’s cheek.
“THAT'S WHO I’M GOING TO BE!”
The entire suburb he was fighting above would later be quoted saying that a clap of thunder happened in the middle of the day after that punch connected. Forget about butterflies’ wings, the wind it kicked up would start a hundred tornadoes in Australia.
There wasn’t a person on the ground below them that couldn’t see Izuku’s feat, most of them staring up at him, wide-eyed, with mouths agape.
Most of them thought that his Quirk was just a little bit of a strength booster, and the ones who knew otherwise were surprised about just how strong Izuku was when he was going all-out.
Izuku and Chisaki hung up in the sky for a moment, as if gravity itself was shocked at their performance. It was only when Izuku started yelling as he plummeted to the ground that people started moving.
Chisaki hit the ground with a solid ‘THUD’ , with Izuku using a small kick to land safely. The second that he did, though, he doubled over and yelled in pain. The glow around Eri was growing larger and larger, dangerously so.
Both Heroes and Villains were staring at them, unable to get close unless they wanted to be affected too. Everyone was shocked into place, watching on as the two yelled out.
All except one of the Yakuza.
He was a minor member, with a Quirk that allowed him to teleport things away from him, depending on their energy level. The more stamina a person had, the further they would be sent, in a random direction.
And he was currently under the effects of Trigger. He warped his shackles away, as they hadn’t given him Quirk suppressing ones due to him hiding his Quirk, and sprinted towards the boy.
“You son of a bitch! I’ll get you for attacking the boss!”
The heroes instantly went into action, moving as fast as they could, but it wasn’t fast enough. The man ran into the field of Eri’s Quirk, either unaware or uncaring of its capabilities.
Eri fell off of Izuku’s back a second before the Yakuza reached Izuku, hitting the ground. Almost immediately after she did so, the Yakuza’s hand landed Izuku on the head.
“Fuck off you little Hero shit!”
-voomp-
A corridor of stars, flying past his eyes.
A nebula floated around him, shifting through every colour of the rainbow.
He found himself falling towards a source of light, akin to a star in the night sky.
As he reached the light, the nebulas started to shift, swirling around like water being pulled into the drain after him.
He saw a field of purple bubbles, each one showing him the earth as if seeing it from space.
The bubbles shifted around him before finally one slammed into his chest, bursting on impact.
Light filled his vision, showing him a street, seemingly just before dawn.
And then he stopped falling.
“It was meant for Jojo, the damnable fool, but you’ll be a fine guinea―what in god’s name?!”
Izuku’s whole body was on fire. Where was he? Why was he being held in the air? What was on his face? What the hell was going on?
“Who the blazes are you, boy? Where did that drunkard go? Answer me you wretch!”
Izuku pulled his head back, using a small amount of his Full Cowling on instinct to break the hold around his throat. He fell backward and landed on the ground, right onto his arm. “Ah!”
It seemed that Eri hadn’t been able to rewind the small fracture he had gotten from just being at 100% Full Cowling. Why had she stopped? Had Aizawa erased her Quirk? What was happening?
He howled as his arm spiked in pain, clutching it as he lay on the ground. Why did he feel so weak? Where was he?
What the hell was going on?
Izuku’s eyes were screwed shut, due to a mixture of his nausea, his broken arm, and the lack of breath from suddenly being choked. As he tried to calm himself, he heard the voice continue.
“Damnable whelp, can’t even answer a question! I guess it doesn’t matter now, you’ll be just as good a test subject as the drunkard was for the mask!”
Izuku yelled out in pain as he felt pain flare up from his stomach, his eyes flying open to see a blonde man with a manic smile stabbing him, blood spurting from the wound.
It was only due to his diminished energy and confusion that he didn’t activate his Full Cowling, yelping as he felt something get placed onto his face.
He was pushed to the ground, and through the holes in whatever was on his face, he saw the man wipe something on him.
Then, after a few seconds of shaking, the object on his face made a ‘shink!’ sound, and Izuku felt a stabbing pain in the back of his head, falling unconscious.
“Yo, kid!! Wake the fuck up!”
‘Smack!’
“MMM!”
“Don't worry kid, you can’t talk right now. It’s a side-effect of us bringing you in here. Might be a little early to reveal ourselves, but we need to have met you. Whatever that guy just did is messing with your body big time.”
Izuku was turned around to see a woman with Jet black hair wearing a Hero costume, a black bodysuit, and yellow gloves and boots. She looked panicked, but noticed his confusion. “Hi, I'm Nana Shimura, 7th wielder of One for All, blah blah blah.”
The woman grabbed a hold of his shoulders and looked him in the eyes. “From what we can tell right now, it’s actually doing a lot of good things, stronger muscles, faster brain activity, that sort of shit.”
She continued. “We don’t know the drawbacks though, so don’t go doing anything stupid, OK? When you wake up, I want you to get as far away from that blonde guy as possible.”
Izuku nodded, trying to look around, but finding himself unable to move his body at all besides nodding. He struggled for a bit, but eventually gave up. If Nana Shimura was here, that meant he was in his head, right?
He was able to try and speak when he saw something appear behind Nana. It was… himself? He pointed toward it with his head, and Nana turned around, looking surprised when she saw it. “Daigoro! Get in here! I need you to help me!”
Izuku’s eyes widened as he saw a bald man in goggles appear out of thin air in front of him, giving him a wave. Nana pointed to the Izuku, who was starting to shake. “Wrap that up with Blackwhip. I don’t know if it’s going to try and hurt him or not.”
Izuku couldn’t help it when he saw the black energy shoot out from this ‘Daigoro’s’ arms and wrap his Doppleganger up like Aizawa would with his scarf, and his brain started analyzing the Quirk.
Nana snapped her fingers in front of his face as he did so, though. “No. Usually, I would encourage you to analyze things like this, but you need to focus. Whatever that guy did to you has changed your body.”
“I’m about to wake you up, and the second I do, you need to run, got it?”
He nodded, wondering how she was capable of waking him up. Was she capable of putting him to sleep as well? What else could she do to hi-
“Boop!”
Now, Dio Brando was an incredibly smart man.
He was quick as a whip, as cunning as a snake, and open-minded to new possibilities. He saw the boy that he had just killed, or at least who he thought he had just killed, come back to life.
When he had shoved the mask on the whelp and wiped the blood on it, the glow that had happened had lit up the street like the coming daylight.
And now that this boy had… risen from the dead, Dio was able to see that something about him had changed. For one, his clothing, as odd as it was, had become so tattered that it fell away, revealing a physique known only in storybooks, and in the Joestars’ training grounds.
Then there were the boy’s teeth. A lesser man may have missed it in the short time he’d had his mouth open, but Dio was no lesser man! Right in the front of his mouth were new additions.
Fangs.
Now Dio had heard all the normal fairy tales, and had studied many old fables during his time at university. He had already accepted that this mask was some mystical artifact, due to the light it had created seconds prior.
And knowing that the mask was magical in some way cemented Dio’s hypothesis as to what happened to this boy. He had become something… inhuman.
The stone mask had turned this boy into a vampire .
“A Vampire! The mask turns people into Vampires! What brilliant luck! With this, I, Dio Brando, can transform myself into a creature of the night, surpassing all of humanity and gaining the power to put Jojo and his family in the ground!”
He cackled as he watched the boy panic, excited by the prospect of becoming a Vampire himself. But he would wait for nightfall, so he wouldn’t burn in the sun. He backed up, stepping out onto the street, feeling the early morning rays hit his back.
He swiped the mask off of the ground and walked away, leaving the boy to his doom. The sun would rise soon, and this test would be over.
Dio now had a plan.
A Vampire?
He was a Vampire now?! That wasn’t possible! Right? Surely not! Was it?! Izuku watched as the man, named Dio Brando, he thought, walked away into the sunlight, feeling an odd sense of dread the further the morning light moved closer towards him.
What were Vampires again? It had been so long since he had read a story with them in it. Most media nowadays focused on science fiction and Quirks; Magic and Monsters had really fallen out of fashion.
Vampires. Nana said that whatever the mask did made him stronger, and that his brain activity had increased, which fit with how he was feeling right now. That wasn’t all though! What was he forgetting?!
Vampires had drawbacks as well. He knew that. One of them was… the Christian cross? Maybe? That sounded right to him. Then there was garlic, which didn’t kill them, but was quite unpleasant, and then there was…
Izuku realized what the sense of dread he was feeling was when the morning sun reached his foot. His eyes widened in realization as he remembered what a Vampire’s biggest weakness was!
Sunlight!
His foot flared in pain and he screamed as it melted before his very eyes. Immediately, he started scooting backward, looking for somewhere he could hide. Instinctively, he flared Full Cowling at 10%, flying backward away from the approaching light.
He was still reeling from the pain in his leg when he saw his salvation, however temporary it may be. Using Full Cowling, he threw himself towards an alleyway to his right, now safe in the building’s shadow.
Izuku crawled behind a few garbage cans and looked down at his leg, noticing that the stump of his foot had already stopped bleeding. Was that a bad thing? He was fairly sure that injuries like that were meant to bleed a lot, but right now he couldn’t really think straight.
He lifted his leg to his chest and checked on the stump, barely holding himself back from crying. Could he still be a hero without his foot? Could he still be a hero as a freaking Vampire? How could he? He would die if his skin came into contact with the sun!
His train of thought pulled the emergency stop as he felt a tingling sensation on his stump. He watched in morbid fascination as he felt energy flow down his leg, akin to the feeling he got when charging up One for All, and gasped in shock when he saw flesh and bone starting to grow from the stump.
It only took a few seconds, and after they were up, Izuku’s stump had regrown into a complete foot, looking as good as new, and feeling all tingly.
He stared at his foot, marveling at the fact that it was there. He could regenerate! What were the limits of it? Could he regrow more than just his extremities? What would happen if he lost a whole arm from, say, using a 100% smash?
It was only when he heard a noise from outside the alleyway that he was broken out of his brainstorming, looking up in confusion. It was… neighing? Of a horse?
He crawled over to the entrance of the alleyway, looking out into the street, and was amazed at what he saw. Horses pulling carriages around the street as people dressed in overly formal, or incredibly simple, clothing wandered around the street.
Izuku was even fairly sure that he saw someone unironically wearing a top hat and a monocle, walking with a cane. They looked like something from the 1800s!
What the hell happened to him? Why was he in the 1800s? Where was he?
Or more accurately, when was he?
It turned out that people in whatever time he was in weren’t very charitable to strangers hiding in alleyways.
Not that Izuku blamed them. He was shirtless, with green hair and a clearly Asian face, and never stepped foot outside of the alleyway, only calling to people that passed by.
The only people who had even talked to him were a pair of police officers who had been called when someone found a body further down the street, who had asked him a few questions about the murder.
Izuku hadn’t noticed it then, but Dio Brando had killed another man, just before he had turned Izuku into a vampire. That was still a crazy thing to think about, becoming a vampire, but he had bigger problems to deal with right now.
Izuku had answered the police officers’ questions as best he could, using their assumption that he was a homeless bum (he was a little insulted, but he understood) to his advantage, making it so he didn’t have to exit the alleyway.
He had told them that he hadn’t seen who killed the man, knowing that if these regular people tried to attack Dio, who was probably a Vampire by now, they would die.
Even if Izuku had to wait until sundown, Izuku was probably the only person alive at this point in time who could defeat Dio if he became a Vampire. He already knew who Dio was going to attack, a ‘Jojo’.
When he asked who ‘Jojo’ was, the police officers had pointed towards the north, right towards a mansion on a faraway hill. They told him that the Joestar family lived in it, and their son Jonathan was known as ‘Jojo’.
Izuku tested out his full cowling, pushing it as far as he could. He was shocked to find that it never started truly hurting, not even when he pushed it into the higher levels. He started to feel aches and pins and needles when he hit ~60%, and it started to look like he was emitting green fire when it was at that level.
Izuku dropped his Full Cowling to 50%, feeling the aches disappear, and smiled widely to himself. Who knew that all it took to get access to the upper levels of One for All was to become a vampire?
Izuku pulled out his phone, having already reset its time to when it was now, and nodded to himself when he saw that it should be sundown soon. He wouldn’t have long from when the sun went down to when he would be able to save Jonathan and his family.
But he was All Might’s successor, the ninth user of One for All. He would save everyone he could. And he would do it with a smile on his face. He would find a way to return to his own time and walk in the sunlight with his friends and comrades again.
He closed his eyes, taking deep breaths as he waited out the last few minutes of daylight. At that moment, he made a promise to himself. A promise that he would do his very best to fulfill.
Dio would regret using him as a guinea pig.
“Look alive Master Joestar, he’s trying to lure you in, like is not.”
Dio turned to the newcomer, unable to stop himself gritting his teeth as a smug-looking worm lit a match, illuminating himself. Who the hell was this?
“Right about now you’re probably wondering who I am?” The man seemed to somehow look even more smug as he moved closer, pissing off Dio even more. “Allow me to elucidate you.”
The man paused halfway through his sentence when an odd burst of wind hit the side of the house. He looked towards the window, before continuing. “My name is Robert E.O. Speedwagon.”
Speedwagon tipped his hat back a little, his smirk settling into a frown. “I had a hunch Jonathan’s run of trouble might not be over, so I followed him home.”
Dio had to physically stop himself from getting up right now and stabbing this blundering fool. Was this really what ruined his plan? Some gutter-monkey following Jonathan home like a stray dog?
Another gust of wind hit the side of the mansion, blowing out one of the windows. Where was this damnable wind coming from? He took the opportunity to stand up while everyone was watching the window.
“Jojo! I want you to be the ones to put the cuffs on me! It was hubris that brought me to this fate. This fall from grace has taught me well. However, one might scheme and plot my downfall this night is part of the human condition.”
He smirked internally as Jojo moved closer, and stealthily grabbed the stone mask from inside the sling holding his arm up, which was part of his ploy to earn pity from his accusers.
“A condition I now forsake.”
He relished the confusion in Jojo’s eyes as he spoke those words. The naive idiot even dropped his guard a little bit. “Wait, forsake? What do you mean?”
A chuckle escaped his lips as he pulled out the stone mask with his right hand, pulling out the knife he had taken from that drunkard-turned-whelp with his left. “You see! I am about to become so much more!”
He slammed the stone mask onto himself, thrusting the knife forward, feeling it sink into Jojo, blood splattering onto the mask. He felt the mask vibrate, and felt glee and anticipation, before finally, the spikes sprung out of it.
And into his skull.
Jonathan clutched to his father’s body as it started to go limp.
He barely registered the light coming from his mother’s mask, or the fact that the policemen in his house had started firing at Dio, who was cackling madly.
A fire rose in Jonathan’s chest. Dio. This was all his fault. He had been trying to kill his father since day one! Mr. Speedwagon was right, Dio was evil, down to his very bones!
Dio’s body flew out of the window from the force of the gunshots, breaking right through it and landing on the ground, the mask staying attached to his head.
He looked up from his father just in time for the inspector to tell him the story of Dio’s father as he lamented not driving the Brandos out of town years ago.
He had barely finished the story when Jonathan’s father found the strength to speak. “Jonathan. My son. I implore you, please do not hate-”
“DIO BRANDO!”
Everyone stopped what they were doing as the unknown voice nearly shook the Joestar mansion. It was only a second later when their entire world changed.
A boy, who looked around 16 years old, shirtless, smashed through the front wall of the Joestar Mansion, landing right in front of the main staircase. He was glowing green, energy flowing off of him like fire as he scanned the room.
“WHERE IS DIO BRANDO? He’s here to kill… Jonathan.” The boy stopped as he seemingly saw him holding his father, everyone in the room staring at him in shock.
But before anyone could say anything to the boy who had just kicked a stone wall down, the inspector yelled out to them, panic clear in his voice.
“Dio’s body is gone!”
Izuku’s heart cried out as he saw the man with the knife in his back.
It cried even louder when he saw the younger man clutching onto him, tears staining his eyes, staring at Izuku. Izuku took a step towards the pair, already reaching down to the first aid kit on his belt.
“Dio’s body is gone!”
Instantly, Izuku changed focus. He whipped around to the voice, activating Full Cowling at 15%. It wouldn’t do to injure anyone here with the blasts of air One for All kicked up. “Dio Brando! I know you’re still here! Show yourself!”
There was silence for a moment, before chuckling reverberated around the mansion’s hall. “So my little guinea pig has come back to be my test subject once again!”
Izuku whipped his head towards the roof, dodging as Dio dropped down from above him, Full Cowling giving him more than enough speed to dodge such an attack. He stopped in front of who he assumed was Jonathan and thrust his first aid kit into the man’s hands.
Turning to him for a moment, he spoke in the clearest English he could, looking Jonathan right in the eyes. “Syringe into neck, put the bandage around the wound. Apply pressure, but don’t take the knife out. I will come back and help soon.”
He didn’t wait to see Jonathan’s response, instead turning back to Dio, throwing his arm up to block the spear he had swung at him. His arm sheared right through the metal pole, the two halves clattering to the ground.
“You’re not killing anyone, Dio Brando! Not while I have anything to say about it!”
Dio jumped backward, laughing as he pulled one of the curtains in the hall down onto Izuku, momentarily blinding him. Izuku was quick to shred the cloth, but wasn’t fast enough to stop Dio from grabbing one of the police officers.
Izuku launched forward and kicked Dio’s arm, but it was too late. Dio had stuck his hand into the officer’s neck, and from the looks of things, had drained the poor man dry. Jumping to the top of the staircase, Dio posed, laughing at Izuku.
“Oh, what a useless whelp you turned out to be, Guinea Pig! Mere seconds after your foolish promise, and I’ve turned you into a liar! What will you do about that, eh whelp?”
Izuku’s anger flared up for a moment, and he felt something in his mind shift for a moment. He felt himself getting angrier, and could almost feel something gripping his mind, squeezing out every last drop of aggression he had in him.
He shook slightly, the green glow around him calming slightly, before he spoke, his voice reverberating throughout the entire hall thanks to One for All.
“You turned me into a Vampire against my will! You murdered multiple people in cold blood! You laugh, carefree, as you stand near your victims!”
Everyone in the room looked away as Izuku flared One for All at 75%, blocking their ears as he roared . The power flowing through him felt like fire in his veins, and he could feel his bones fracturing with every movement, but regenerating almost as quickly.
With rage filling him, overpowering the small amounts of Deja Vu he felt, he stared up at Dio, who looked surprised. Izuku looked the man right in the eyes, and growled .
“Your time is up, Dio Brando. You wanted to be a monster? A beast? Something other than Human? Fine. ”
“Allow me to treat you like one.”
Jonathan had to plant his feet to keep his father stable.
A blast of air had hit him and the remaining police officers, most of them being knocked off of their feet. But the person that was trying to help them, trying to stop whatever monster Dio had become, had given him a task.
It was only right that he did what the boy who was trying to save all of their lives told him to. And if it would help keep his father alive, like he suspected it would, he would go to any lengths necessary to make it happen.
He reached out to the side and grabbed one half of the spear that the boy had broken, stabbing it into the ground and using it to anchor himself next to his father, keeping pressure on the wound, but keeping the knife in, like the boy said to.
He watched as Dio tried to keep up with the boy, who was clearly moving faster than he could keep track of, leaving a green blur in his wake. Jonathan had never seen anything move so fast in his life, except for bullets.
Was this boy a gift from the heavens? A guardian angel, here to protect their family from the evil of Dio? Jonathan wanted to believe that, but with the boy yelling that Dio had turned him in a Vampire, he couldn’t.
If anything, this boy was an unfortunate victim who used his tragically obtained, newfound powers for good. A truly noble soul. A hero, like in the fairy tales, with power thrust onto them against their will, tasked with a seemingly impossible job.
Was he exaggerating a bit, because of the shock he was feeling? Quite possibly. Was he exaggerating the boy's good qualities because he had given Jonathan hope of having his father survive this night? Again, it was quite possible.
But he couldn’t deny that the boy was incredible.
He would have to thank him when this was all over. Because if the outcome was in their favour, it would all be because of the boy’s timely arrival.
Dio screamed in a mix of agony and hatred when he felt something slam into his arm, shearing it off entirely.
He had barely seen the whelp move! One second, he was making a fool of himself by making a speech in the middle of a fight (the irony was 100% lost on him), then suddenly in a flash of green light, the whelp was behind him, and his arm had been removed.
This wasn’t the only effect the boy’s movement had, though. The gusts of wind that blew through the hall, and down the different hallways and rooms of the Joestar mansion, knocked over many a candle, or lantern.
Dio smirked as he willed his arm to return to him, feeling the limb respond to his command, the arteries and veins writhing like worms to pull it back towards him.
It reattached itself with ease, and he could feel his skin fuse back together. He laughed, turning around quickly to punch the boy, only to feel his left leg get torn off at the knee.
He dropped to the ground with a howl, instantly bringing his leg back to himself and re-attaching it. The moment he stood up, though, he felt himself get punched in the back, and flew down the steps.
“You feeling powerful, Dio Brando? Do you feel superior right now? I hate people like you, looking down your noses at everyone. You remind me of someone I know, actually.”
The boy chuckled, grabbing his head as if in pain. “Or should I say, I will know. It’s funny. Isn’t this all funny? You bragged about surpassing everything, but you can’t even surpass a Deku like me.”
Dio growled, confused, angry, and getting tired. Was this boy insane? And how did he have such speed and power? They were both Vampires, why couldn’t he glow like this whelp did, or move at such speeds?
Whatever. He was just a lucky brat. Not worth his time. But for now, he would have to make a tactical retreat. Until he learned more about this ‘Deku’, he wouldn’t be able to defeat him.
He stood up, back up into the shadows that the doorway created. Growling, he started to sink into them, imagining the area that he wanted to be in. He didn’t know how he knew he could do this. Perhaps it was instinctual for Vampires?
“You win this round, Deku. But mark my words. You and all of the Joestars will die, and it will be at my hands.”
Izuku realised a second too late what Dio was doing.
He rushed forward only to find himself grabbing at the stones that made up the wall. He roared in anger, in frustration, punching the wall.
He continued like this for a moment, punching the wall with one arm, clutching his head with the other. Why was it hurting so much? It couldn’t be physical, he would have regenerated from that.
What was happening to him?
“Daigoro! On your six! Contain it!”
Nana Shimura panted as she coordinated the other previous users of One for All in Izuku’s mindscape. Turning into a Vampire, and wasn’t that a surprise she hadn’t seen coming, had done something to Izuku , more than just physical.
It was as if there was another version of Izuku in here that could grab the controls if Izuku faltered mentally. A wild, rabid version of the boy that worked on instinct and rage.
Izuku had only faltered for a moment when Dio had taunted him, but it had been enough for the doppelganger in his head to grab the reins.
They had been chasing it around for the entirety of Izuku and Dio Brando’s fight, and only now that he was calming down slightly had Daigoro been able to grab it with Blackwhip.
The second that he did, the Doppelganger fell still, and Nana could feel the shift in Izuku’s mindscape as the boy reclaimed his place as the solitary controller.
She looked at the Doppleganger, sitting on the ground, asleep in Daigoro’s blackwhips.
This was going to be one bizarre adventure, wasn’t it?