Chapter 1: Bring Your All

A/N: Dad For One is fairly common as a story basis in this fandom, as is the idea of giving Izuku All For One instead of One For All. But this story is going to be different. Because here, Izuku won't just have All For One. He'll do the one thing All For One could never do: take back One For All. And there will be hell to pay for that.

Izuku Midoriya was, by all accounts, a fairly normal fifth generation Quirk user. An All Might fanboy, more than a little bit of a Quirk nerd, more than a little scrawny, but otherwise, average. But some days, he really wasn't sure whether he'd call himself normal.

The first time had been when he was 7; he'd been playing with Katsuki and messing around, trying to see if his flames could light up the blonde boy's sweat, when he'd grabbed his friend's arm. The next time Katsuki went to make another explosion... nothing happened. It didn't stick, luckily, and the two were back to their antics not a moment later than that.

Next had been when he was 11. This time, it'd been with a girl he'd had a bit of a crush on, she could crystalize her limbs. She'd offered to hold his hand while walking back from school one day, and him being the nervous wreck that he was, nearly fainted from the idea. But when he did, he felt a tingling. Apparently she had too, and she found that her arm wouldn't turn to crystals like it always did. She'd run away home crying after that, Izuku unable to apologize for something he hadn't even realized he could do. Luckily again, the effect wasn't permanent; within the week she was back to normal, though he knew his hopes of talking to her ever again were crushed.

And now, he was just past 14, on summer vacation, relaxing on the beach with a few friends, when…

"AH! S-some kind of m-monster!" someone shouted. Instantly he sprang up, noticing the odd shadow in the water, and then it broke the surface: an odd, amorphous blob of a villain, looking like an oversize jellyfish, slinking about in the water and dragging people in with its tentacles. Izuku gulped, unsure of what to do. It had always been in his nature to help, but while fire was nice, given he was at the beach, well, there was only so much he could do.

And so he decided that maybe not approaching the jelly kaiju was a smart decision, and he took off running, that is, until he noticed someone stuck in the sand.

"HELP! I-I can't move my leg!" the person shouted, and Izuku realized it was a girl, her leg having gotten caught in a small patch of quicksand. Forcing down his nervous mutterings, he ran in.

"I-I've got you, miss!" he shouted, reaching down and attempting to pull her up. Dammit, my arms aren't strong enough, he cursed as he struggled to pull the girl out. But then, there was the tingling. What the – before he could react he suddenly yanked her out like she weighed nothing at all. He fell back on his butt, only to realize the girl was floating a few feet in the air.

"Release!" she called out, bringing her fingers together, only to realize that nothing was happening. "AH! HELP! PULL ME DOWN!"

Izuku's eyes widened, then he stared down at his hands, still feeling the tingly sensation from earlier. On closer inspection he realized… What are these?

Turning his hands around, the girl's eyes widened. "HUH – how'd that happen!? Wait, hold on, bring your fingers together! L-like I did!" Izuku nodded, doing just that, and the girl plopped back on the sand. The two then continued running away from the giant jellyfish villain.

Eventually, when they were off the sand, the girl said, "Hi, I-I'm Ochaco Uraraka! What's your name? And why do you have my Quirk?"

Izuku gulped. "I-I'm Izuku Midoriya, a-and I… don't know… I feel kinda tingly though."

"Well, maybe you got it when you grabbed my arm?" Ochaco asked.

"I-I guess," Izuku mumbled. "Y-you can have it back now!"

Ochaco sighed. "I can't just take it back, y'know! Give it here!"

Izuku stopped, then realized she was right. Quickly, he held tight to her arm and felt the odd sensation again, and sure enough, Ochaco's Quirk was back in her own hands.

"Th-thanks for saving me, by the way…" Ochaco added. "Even if you kinda stole my Quirk to do it."

"I-I didn't mean to!" Izuku blurted out. "I-I didn't even think I could, I mean that's not what my Quirk is!"

"Wait, really?" Ochaco said, raising an eyebrow. "What is it then?"

"Uh, Flamethrower; I can shoot fire from my hands," explained Izuku.

"That… was definitely not what you did just now."

"Which is why it's so weird! Look, I'll prove it!" Saying this, he let out a small burst of flame.

"Alright, neat, but you can still take Quirks!"

"And give them back, gotta remember that!"

Ochaco glared. "You didn't know you could do that until I told you!"

"I never had to!" said Izuku, raising his hands in surrender.

"Alright, alright, fine. We should probably head home for now… I've gotta get to Mie, so…"

"This late!?" Izuku spluttered. "Nah, you can stay at my house!"

"Really!? You'd do that!?" Ochaco exclaimed.

"Absolutely! Come on, it's just a stop or two away!" With that, he and Ochaco walked to the station and hopped on, a few stops later, at Tatooin Station, they hopped off, when…

*BOOM!* "Again!? Seriously!?" Izuku shouted, staring at the wrecked train tracks ahead of him. Standing there was a giant villain, who decided he'd try and mess with the now stalled train. Grabbing onto the lead car, the villain hoisted the train like a metal chain, and was about to toss it away when out of nowhere- "LACQUERED CHAIN-" "CANYON CANNON!"

"Hey everybody, Mt. Lady here, and you," she pointed at the now dazed villain, "Are going straight in the slammer, got it!?" As she said this, she bent over slightly, baring her… generous curves at the crowd that was forming. Several cameras appeared, and the giantess hero gave a coy smile and a wink as she turned back around, allowing Kamui Woods, who'd been rather rudely interrupted, to safely restrain the villain and escort him to a waiting police car.

As Izuku and Ochaco watched on at the unfolding spectacle, Ochaco noticed the green-haired boy had started mumbling and scribbling furiously in a notebook. "Hey, Midoriya-kun? Hello, Earth to Midoriya-kun!" When nothing seemed to distract him, Ochaco gently let the notebook float out of his hands.

"Hey, give that back!" Izuku moaned.

"Pay attention! The city's real busy and you could get hit by something, like a car or some crazy giant's foot!" Ochaco countered.

"Fine…" Izuku groaned. "But anyway, we're here!" Saying this, he gestured to a series of apartment blocks, each numbered accordingly. He pointed at building 2's 5th floor, and said, "My apartment's right there! Actually, wait… there she is!" Ochaco stood, confused, until she saw the woman now standing on the balcony. "Hey mom!" Izuku called.

With that, the two made their way up to the apartment. Opening the door, the two say Izuku's mother Inko sitting at the table, trembling a little. "Hi mom! We made it back, safe and sound!"

"Oh, Izuku, my baby, you're safe! 2 villain attacks in one day! I can't believe this!" Inko shouted, before she realized what he'd said. "Wait, who's 'we?'"

"Hello, Mrs. Midoriya! I'm Ochaco Uraraka," she said. "Your son saved me from that giant jellyfish villain earlier and he offered to let me stay the night here."

"Well, you're certainly welcome to!" said Inko. "And Izuku, good job nailing yourself a girlfriend!"

"Wha-buh-she's not my…" Izuku spluttered.

"We just met!" Ochaco added. "And I wouldn't exactly call that a first date, either!"

"Well, Uraraka, I think you'll find that plenty of relationships start from less desirable circumstances. My marriage, for instance!" Inko said with a chuckle.

"Yeah, the one dad left from?" Izuku noted. "You always say he works overseas but he barely even calls you or writes anymore!"

"Uh, can we maybe discuss slightly happier topics?" Ochaco jutted in. "I don't exactly have a bed over here, so…"

"There should be a fold-out futon in my husband's study," Inko said. "If not, are you OK with just sleeping on the couch?"

"My family's not too well-off so sometimes our beds aren't great, so I'm OK with the couch," Ochaco said, looking down slightly.

"What!?" Izuku shouted. "In that case, take my room! My bed's great, it's super comfy and springy like all get out, you'll be like a baby!"

"You really don't have to…" Ochaco said.

"I insist!" Izuku said. "As an aspiring hero I will always be willing to provide for others even at a cost to myself! It's my one sworn duty!"

Ochaco stared at him, both admiring and questioning the lofty goal. One the one hand, selflessness was something sorely lacking in this day and age. On the other, there's always a point of being too selfless. Ochaco wasn't sure if Izuku was crossing the line, but he seemed to be very close. "Alright, I guess I'm taking Midoriya-kun's bed!"

"Oh, please, just call him Izuku!" Inko said. "He let you come all this way to stay with us, I think you can safely be counted as a friend."

"Alright, then, Izuku!" Ochaco called. "In that case, would you mind calling me Ochaco?"

"Not at all! Anyway, while you're here, you can go hang out with Kacchan and I tomorrow!" Izuku said.

"Who's Kacchan?" Ochaco asked.

"You'll know," said Izuku.

Ochaco stared at the green-haired boy, tilting her head slightly at the cryptic statement. Still, she wouldn't say know to a bed, even if it was… Oh my god I'm sleeping in a boy's bedroom. Suddenly her cheeks flushed bright red, but she pushed through to open the door and… That's a lot of All Might merch. "Is all of this yours?" she asked, gesturing to, well… everything.

"Oh, uh, yeah…" Izuku mumbled. "I-I'm pretty sure I'm his biggest fan; I've gotten every single All Might merch item that's been released since I was 3, so…"

"Huh." Ochaco said. "Are you sure you don't mind me sleeping here?"

"What? No, of course not!" Izuku said. "I'd be perfectly willing to let any nice girl… hang… out… in… my… bedroom…" Suddenly Izuku turned bright red very quickly, and his hands began to start leaking flames. When he noticed this, he freaked out more and began loudly muttering something about the new Quirks he'd seen in action today, and after a few minutes (and a bit of a singed wall) he was good as new. Very quietly, he added, "I don't have much luck with girls… The last one I had a crush on ran away screaming and crying when I turned off her Quirk by accident…"

"What!?" Ochaco exclaimed. "You!? Trouble with girls? That can't be right!"

Inko, who'd been in the kitchen, heard the shouting, and with a laugh, added, "My little Izu used to have girls chasing after him every day because he was just so nice and adorable and he never noticed! Every other week there'd be a letter or note or package sent to Izuku by a girl he'd met or was in his class."

"Hang on, I don't remember this!" Izuku cried out. "Wait, do you mean… Oh my God I thought those were things dad sent you!"

"Maybe every month, sure," said Inko. "But the rest were for you!"

Ochaco grinned. "Huh, looks like you're a harem anime protagonist! Or one for a dating sim!"

"Wha-Hey, no I'm not!" Izuku groaned.

"Come on, seriously?" Ochaco said. "Girls trying desperately to get your attention, and you, the dense, generic teen barely even notices them or takes them completely the wrong way?"

"Uh…" Izuku mumbled.

"Well, no more!" Ochaco smirked. "Because now you've done the unthinkable for the average teenage guy! You have a girl in your bedroom!"

"C-can I rethink the offer?" Izuku ventured.

"Nope! You made this bed, now let me lie in it!" Ochaco said.

"OK… But uh, word of advice, you may want to turn the figurines around." Izuku said. "I swear I can sometimes feel All Might staring at me. Anyway, good night!"

"Night!" Ochaco called back as she shut the door. Izuku went to grab a blanket and pillow and change into his PJs (a shirt labelled 'bed shirt' and some spare shorts) before he too went to sleep.

That night, however, sleep did not come easily; because instead of drifting off, Izuku found himself staring into a dark abyss. Suddenly there came a voice: "Well done… truly, well done."

"Dad?" Izuku asked. "Wha-where am I? What is this?"

"Welcome… to the All For One mindscape," boomed the elder Midoriya ominously.

"What am I doing here? And… wait you're All For One?" Izuku asked.

Hisashi began to clap. "Well, this is the very first time you've truly utilized All For One's full potential, son! It's a momentous occasion. And so soon after your birthday, too!" He paused. "As for your other question, well, yes, I am. I am indeed the man known as All For One, the one who brought order and stability through my ability to transfer Quirks."

"Order and stability? Really? B-but you're stealing what makes people, well, themselves!" Izuku shouted into the void.

"And if someone doesn't like who they are?" Hisashi said. "I give them the option to change that. And now, Izuku, now… it's your turn."

"My turn to do what, exactly? Lead your underworld empire?" Izuku asked. "You know I can't do that! I've wanted to be a hero! Always have!"

"I have a massive corporate enterprise too, you know." Hisashi said. "That job that always sends me on business trips is for a very legitimate company."

"Again, hero." Izuku countered. "I know heroics has a lot of paperwork but I can't really be a hero and manage your massive corporate conglomerate too, you know."

"I think you'll find that with the right Quirks, you can do anything." Hisashi noted.

"I don't want to take Quirks either!" Izuku shouted.

"And what good is a flamethrower underwater? Or in a burning building?" Hisashi retorted. "You need options, and you can have them!"

"I don't want them!" Izuku exclaimed. "I know what being Quirkless gets you in this day and age, I've seen it! With Kacchan, that crystal girl, hey even today another girl nearly ran off when I accidentally used her own Quirk to save herself!"

"Which is exactly what you should do!" Hisashi shouted. "If someone's Quirk is failing them or they simply can't activate it, you could take it from them, maybe even use it for something good. Like today on the beach, given what your mother mentioned."

"Fine…" Izuku said. "But only that. I'm not getting involved in your mess."

"Oh, I think you'll find there isn't a choice for you, son." Hisashi said. "Even now my successor is training to reveal himself. Who better to talk him down from tearing the whole system apart than his very own little brother?"

"Wait, I have an older brother!?" Izuku shouted. "Since when!?"

"I adopted him right around when you were born, though your last names aren't the same." Hisashi explained. "Keep an eye out for a college-age kid named Tomura Shigaraki, would you?"

"I… guess…" Izuku said. "Hang on, why tell me all this? I could just inform the police, or a hero agency, or something like that."

"You think I don't have the entire police department under my thumb? Or the Hero Commission? Come now, Izuku, my influence hasn't faded just yet." Hisashi chuckled. "All Might may believe you, but what are the odds that you ever meet him in person?"

"I have literally all of his merch from the past 10 years, some of which was limited edition only sold at exclusive-access interviews and conventions," Izuku said. "Let's just say I've got a bit of an 'in.' You're not the only one with extensive outreach."

"Oh? Really?" Hisashi said. "Is it through the Bakugos? Your mother doesn't know too many people."

"Nah, someone else. Works at Might Tower," Izuku said.

"A hero, then?" Hisashi asked.

"No, he's just All Might's Chief Secretary." Izuku corrected. "I met him at a con and told him about my Quirk notebook entry on All Might, and from there he… just let me in."

"An odd coincidence," Hisashi commented. "Just who is this secretary?"

"Uh, Mr. Yagi," Izuku answered. "I don't know his first name."

Yagi…? That can't be right… Hisashi thought. "Well far be it from me to ask you to break standards of propriety. Either way I sincerely doubt All Might will make time for you."

"Eh, I may have a solution for that," Izuku said.

"Do you now? I assume you won't tell me, but I look forward to seeing your results," said Hisashi. "Anyway, our time in this little space is up, so I suggest you maybe check on the girl you let sleep in your bedroom."

"Uh… sure… dad…" Izuku groaned, and suddenly the void disappeared. Turning to check the time, he noticed it was just past 8 AM, so he quickly slid off the couch before realizing something: Ochaco probably hadn't brought a spare set of clothes with her. Knocking on his door, he asked, "Uh, do you need me to get you some extra clothes?"

"No, no, it's fine!" Ochaco said. "I'm used to wearing clothes maybe one extra time to save water on laundry. Trust me, I've had worse."

"OK…" Izuku said, and a minute later Ochaco stepped out.

Later that morning, after the two had had breakfast, they'd gone over to the Bakugo residence, a fairly upscale 3 story house located a few blocks up from the Midoriya apartment. Knocking on the door, they heard muffled shouting.

"Oi, Katsuki, Izuku's here!" Katsuki's mother, Mitsuki shouted.

"Alright, hag, you don't gotta fuckin' shout!" Katsuki shouted back.

"Just open the goddamn door, brat!" Mitsuki snapped.

"I'm gonna fuckin get it, hag! Jeez!" Katsuki exclaimed, before grabbing the door and damn near yanking it right off the hinges. "Oi, Izuku, get your ass in here." He then noticed Ochaco. "Wait, who the hell is she!? Since when the hell did you get a girlfriend, you damn Deku scrub!?"

"Alright, one, don't call me a Deku scrub, two, she's not my girlfriend, and three, she's from Mie." Izuku said, raising his fingers as he did so.

"What the hell is a Mie chick doin' in fuckin' Musutafu!?" Katsuki yelled.

"Takoba Beach just opened itself up partway thanks to someone cleaning it up. It's not much, but I kinda wanted to go," Ochaco said. "Then that big jellyfish kaiju sprang up and by the time Izuku and I got far enough away, it was getting late enough there'd be no trains back to Mie. So I hung out at his place."

"Aight, Round Face, that actually makes sense." Katsuki said. "Anyway fuck it, name's Katsuki Bakugo and I'm gonna 100% be the number 1 hero. So stay the fuck outta my way, you goddamn extra."

"Extra!?" Ochaco shouted. "Oi, I'm pretty sure if anyone's the protagonist it's Izuku!"

"We haven't established that!" Izuku said.

"Fuckin' Deku over there?" Katsuki shouted, swinging wildly in Izuku's general direction. "Scrubby, scrawny Deku!? Sure he's got flamethrowers but come on! He's literally just a human Deku scrub!"

"He's also almost unfathomably nice!" Ochaco said. "He didn't even know me and he just moved to save me from the jelly monster like it was his job!"

"What-fucking-ever, Round Face." Katsuki rolled his eyes. "Just fucking stay outta my way. And when the time comes for me and Deku to go at it, I'm gonna fucking turn him from Deku to Decked-u."

"Hey, Kacchan, just gotta remember that I'm the guy who knows basically all of All Might's secrets." Izuku said, pulling out his notebook from… somewhere. "If you're ever gonna beat him you're gonna need some tips from me."

"Alright, fine. You get me insider info, I get number 1, then I deck you." Katsuki grumbled.

"Glad we worked that one out," said Izuku. "Anyway, what're we doing?"

"Jack-fucking-shit, because apparently Musutafu's gone to yellow alert." Katsuki said.

"Wait, what?" Ochaco asked. "What does that mean?"

"Oh, uh, since Musutafu's the city where UA is, they're kinda hard on villain activity in the area," Izuku explained. "Usually everything's green, which means all clear, but given the 2 big villain attacks yesterday they may have gone to yellow alert. That means most large gathering spaces are closed today aside from public transit."

"What's after that? Red alert, I guess?" Ochaco said.

"Well, orange alert, which also shuts down small businesses and stuff, while giving clearance to open any evacuation shelters," Izuku continued. "Then it's red alert, which means all of Musutafu goes into lockdown. There's even apparently a black alert, but that's only ever happened once, and it was a while ago, back when All For One wasn't just a boogeyman."

"So, nothing fun's open?" Ochaco said. "Well, then maybe I should just, y'know, go…"

"No, no there's definitely stuff to do!" Izuku interjected. "And besides, yellow alerts also stop all outbound trains. You're not going back to Mie today."

"Huh. Well, then, what are we doing?" Ochaco asked.

"There's an old forest nearby that Kacchan and I used to hang out in," Izuku said. "Wanna check it out?"

"OK…" Ochaco said.

"Well, I ain't going. Stupid woods are boring anyway," Katsuki said. "Now get outta my face, extras."

"Alright, alright, going…" Izuku mumbled.

"Is he always like that?" Ochaco asked.

"He's a little more on edge than usual since he's bored," Izuku replied, "But yeah, basically."

"Hm…" Ochaco thought. "How do you two even know each other?"

"Our moms are best friends; we grew up together. It's… why I call him Kacchan actually." Izuku said.

"Lemme guess, couldn't pronounce his name as a baby?" Ochaco said.

"Yeah, pretty much – Oh hey I remember this tree!" Izuku gestured to a large tree that had fallen over, bridging a small stream.

"Why this tree specifically? Besides the fact it fell over." Ochaco asked.

"Oh, uh, when we were like 4 or 5 Kacchan and I and some of his friends were exploring and we found this tree." Izuku explained. "He tried to cross, then slipped. I helped him up, but that's also about when he started calling me Deku. 'Cause I was a short scrawny kid in the middle of the woods."

"Huh, that's… interesting." Ochaco said. "Wait, doesn't 'Deku' also sorta mean useless?"

"Well, I guess…" Izuku said, "But I never really thought of it like that. Kacchan's nice enough deep down, so I figure maybe he was trying to get me to improve. He's not wrong about me being short and scrawny. Have you seen my arms?"

"True… So, maybe you take it less as 'Deku the useless nerd' and more as 'Deku the always-improving.' Like… 'dekiru,' y'know, 'you can do it!'" Ochaco said, fist pumping.

"Yeah! I can do it! I will be a hero! And there isn't anyone who can tell me no – WOAH!" Out of nowhere Izuku slipped on the grass, and fell down toward the stream. Ochaco dived down to catch him with her Quirk, but her reach just barely wasn't enough. And so Izuku fell into the river, hair and clothes getting completely and utterly soaked. "Well, maybe one thing…" he said, even as he began drying himself off with a small flame.

Unfortunately, said small flame let loose an ember, and while most of the ground was wet and slick, a patch of dried-out leaves remained. Within minutes the ember had turned into a flame, and soon enough, the small fire began to spread.

By the time the two had gone back to Izuku's apartment, the fire had begun to cover a good chunk of the forest, but most of the heroes on the scene had no good way of handling the flames. The only one remotely capable was Backdraft, but against an inferno of that size Mt. Lady would have a better time stomping it out.

Soon enough, however, All Might arrived, and using a couple of Air Force attacks, he managed to blow away all the flames. He then went to ask the police and fire department what had happened. The fire department was fairly brief on the subject, but the police had more to say.

"How did this happen?" All Might asked.

"Someone either decided to use the woods to smoke or someone's Quirk was used," said Tsukauchi. "Given the lack of any common cigarette ash or other inhaled drug residue, signs point to a Quirk."

"Do we know who was in there today?" All Might asked.

Tsukauchi pulled out a list. "A fair few people were, but the most intriguing pair was two teens, Izuku Midoriya and Ochaco Uraraka." Midoriya!? Wait, right he lives here…

"I… know the boy. Midoriya, that is." All Might said. "I can go talk to him."

"Understood, All Might," said Tsukauchi. "Call me when you're done."

A/N: Well, Izuku's not getting One For All just yet, but All Might's already seen his potential thanks to the discussions he has as Toshi. But rest assured, he will when the time comes. And there's going to be pretty major consequences for that. Oh, and of course, Izuku knows what his dad does! Hisashi figured Izuku would be too smart to stay hidden, so he didn't.