Izuku's Time Traveling Babysitting Service

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Chapter One

Nana

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It started out as a normal Monday. Izuku got up, got ready, ate breakfast with his classmates, and braced himself for another day at U.A. Today promised to be a long one, but nothing he couldn't handle.

Izuku, like all his fellow students, looked forward to their heroic coursework. Their other academic work, however, was just as grueling and offered little in the way of adrenaline to get the students pumped and excited. History, art, mathematics, social studies, the sciences, as well as language studies in Japanese and English were constant sources of mental exhaustion. Unlike the students in the general studies group, students on the hero course were expected to carry these courses and the additional work of their hero courses. The only course dropped by the hero course that general studies took part in was physical-education and for obvious reasons.

For three periods everything seemed normal. Lunch passed without any incident save for a loud argument between Bakugou of 1-A and Monoma of 1-B. No one was hurt, but there was a lot of yelling in the cafeteria.

Social studies that day, though, proved memorable.

That day's lesson was about Durkheim and his theory of social functionalism. That, however, is not what made the class memorable, certainly not for Izuku.

The would-be hero, the successor to All Might, was taking notes when he felt it. A bite. Just a tiny little bite on the back of his neck, like the sting of a diminutive insect or spider. His hand moved to the spot instinctively, but nothing was there for him to capture or squash. He thought nothing of it and carried on, writing in his notebook.

"What the hell?" Bakugou looked over at Midoriya as he blurted out the words. Mineta looked over as well, staring in wordless shock.

Izuku was so caught up in his notes and the lecture that he didn't notice what they were staring at, at least at first. Then it became obvious.

Sparks of green light suffused in the air around Izuku, from above his head to around his feet. Soon more eyes turned towards him as students turned in their chairs.

"Midoriya, what is the meaning of this?" their teacher called out.

"I, I don't know! I…" Izuku's words were cut off as a nauseous feeling roiled throughout his torso. The green lights flashed intermittently about him like a parade of fireflies or the sparks of a forge. More of them sputtered into existence, dancing around him. Then they landed on his skin.

The sensation was disorienting, but not painful. Before everyone's eyes, Izuku dissipates, evaporating into the air.

"Deku!" Uraraka bolted from her seat at the front of the class.

She was too late. His pen clattered onto his desk. His notes and backpack were left unfinished and unattended, respectively.

"Midoriya!" Iida called out, but their friend was gone.

The class exploded into a panic-fueled uproar.

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Izuku awoke on a comfortable yet tacky couch. It was blue, red, and gold in places. The room surrounding him looked like a shrine to All Might's career. It contained almost every piece of All Might merchandise Izuku had ever heard of.

His inner nerd squealed in his head. This was the collection he'd always dreamed of having. Everything in here worth signing was signed as well. It was almost enough to make him cry.

He got up and walked through the room. It was larger than the apartment he shared with his mom and had glass cases for rarer pieces. What drew him though, was a large photo he had never seen before.

It was All Might standing next to another hero in green. The man was tall, with a squared jaw and muscles that seemed to match All Might's glory days. All Might, though healthy-looking, was thin in this picture.

The two of them smiled for the camera, each of them wearing an iconic All Might expression on their faces. It was silly, inspiring, and fun.

Izuku shed several tears looking at this.

"That was taken three years ago. It was a fun day, one of our favorite memories, so I had it enlarged," came a deep voice from somewhere behind him.

Izuku turned around and stopped cold. His eyes widened enough that he felt the cold air hit the whites where they'd been protected by his lids.

Deku. He knew the man in front of him was Deku. The man in the photo, the man in front of him: they were his future. That smile, those scars, those muscles, all told a story that Izuku hadn't lived through yet. His heart shook in his chest the same way it did whenever he met a famous hero, and that was all the forewarning Izuku needed to know, deep in his chest, that his dream would be a reality someday.

"Hey there Izuku," the older pro-hero version said. His smile was confident, carefree. He was also tall. He radiated strength from every muscle and every bone. His shirt also said "shirt" on it, clinching in Izuku's mind that his future self was just as lazy about fashion as Izuku was in the present.

"H-Hey," Izuku stuttered. Somehow this felt as amazing as meeting All Might for the first time. "I, uh, I have so many questions."

Deku smiled warmly as he walked towards his younger self. Izuku felt the same sense of safety he'd expect from hearing All Might declare his iconic "I Am Here," yet Deku had made no overt words to that effect. He radiated assurance.

"I know," the man said to the boy. "I wish I could answer all of them for you, but just having you here is disrupting things. I can't let you find out too much, or you might mess up the timeline by mistake."

Izuku blinked at Deku's words. The timeline. The timeline! "I'm… this is the future? You called me forward through time?"

Deku nodded solemnly. His smile never decreased, but his eyes seemed sad. "Yes. I normally would never do something like this but we're in a unique situation, one I can't tell you about. Unfortunately, all I can do is ask you for your help."

Izuku didn't hesitate. "Whatever it is, I'll help."

Deku gestured for Izuku to follow. "Come on, this is just my den for old memories. The real treasure is just one room over."

The real treasure? Izuku was confused, he thought Deku needed his help.

Deku lead him out of the room into a vacant hallway. Izuku could tell that the walls here were stripped bare recently. The plain painted surface was pocked with nails here and there where framed photos once hung and would likely hang again. Why would Deku take down all of his photos, though? Were they taken down just so that Izuku wouldn't see them?

The room at the other end of the hall had an open door, but there was a waist-high gate installed in the doorframe. Izuku's eyes were immediately assaulted by color. This room was pink and blue, with an occasional rainbow. Dolls were strewn all over the place. Music played from a tv in the corner, but the little girl barely paid any attention to the team of female heroes beating up bad guys in the animated adventure on screen.

Wait, little girl?

Izuku stopped cold, taking in every detail. Her cheeks were chubby, dimpled with the smile that dominated her face. "Papa! I drew you a picture!" she cried out as she stood up, tossing her dolls to the side. Her eyes sparkled like emeralds beneath a messy mop of brown hair that cascaded down to her shoulders.

Deku knelt down to pick her up. She ran into his arms and squealed when he ascended, raising her up above his head. "Daddy! The picture!" she giggled as she reminded him.

"Alright, let's see what you drew," Deku said to his daughter.

That's when it struck home. Deku's daughter. Izuku's future daughter. "I'm a father," he whispered to himself.

She pointed at the table where her crayons and coloring books were, and Deku walked her over before picking up a large piece of construction paper. The coloring on it was the work of a child, not a great masterpiece, but his eyes lit up like it was the work of prodigy worth placing in any museum, or even his den next to his All Might collection. "Oh, wow, you did this for me? You love papa that much?"

Izuku stepped past the gate, walking forward as if he were a zombie. None of this felt like it was real. He was a father or would be. Wait. Was he a single dad? Was he married? He shook those questions to the side and peered over to the parchment.

He had no idea what the little girl, his daughter, drew. The people were glorified stick figures with smiling faces. "It's very pretty," he offered.

The girl locked eyes on him. "Daddy, who is this?"

Deku brought her closer to his younger self. "Nana, this is going to be hard to explain, but this young man is a smaller version of your Papa. Aunt Mei used a machine to bring him here, but the machine couldn't make a complete Papa, so he's a bit small. Izuku, this is our daughter, Nana."

Izuku's heart swelled. He feared he would cry or choke. "It's nice to meet you, Nana."

Her eyes were intense as she furrowed her little eyebrows at him. She couldn't have been older than four. She studied his face intensely, cataloging his features. She offered a short grunt before turning back to her father. "Aunt Mei's machine turned you weird, Papa. Will he get big soon?"

The big man laughed. "Papa's always been a bit weird. Yes, he'll get big soon enough. First, though, Papa needs you to go on a secret mission."

Her eyes lit up. Izuku's curiosity piqued. "A secret mission?!" she bounced in his arms; her tiny body unable to contain her excitement.

He gave his daughter a kiss on one of her chubby cheeks. "Yes. I need you to go with Little Papa, or you can call him Izuku, and scout out his home. I want you to be careful, and to let him guide you and for you to do what he says while you're there. According to Mei, her machine accidentally made small versions of everyone and they're all there. Can you find out if that's true for me?"

Izuku marveled at this explanation of time travel, and also shook with fear. Was his older self really doing this? Sending his daughter back in time with his younger self? "Uh… is this a good idea?"

Deku turned his eyes, locking them with Izuku's. "Keep her safe for me, please."

The way he said it, Izuku immediately understood. Something in the future was a threat, one so terrible that Deku needed his daughter beyond anyone else's reach. She looked curiously at him again, her cheeks puffing up with irritation. "I don't want to go with Little Papa. I want Papa."

Whatever the threat was, Deku didn't want his daughter to know, and he couldn't tell Izuku because of the timeline. Izuku's brain wracked, trying to think of a threat so terrible that he'd resort to time travel to keep his family safe.

Even as little Nana rejected him, Izuku fell helplessly in love. He knew that he would do anything to make sure this child was safe. No, not "this child." This was his daughter, Nana. "I'll keep her safe, sir."

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The U.A. campus entered full lockdown after Midoriya Izuku's disappearance. The students could not leave, and deliveries entering were triple checked. The news shocked everyone. The duty to inform Midoriya Inko fell to All Might. The faculty searched the entire campus repeatedly while the students were banished into their dorms.

All of that was more than eight hours ago.

With a disastrous school day and dinner behind them, the students were finally allowed to venture out, but only within a specified range of their dormitories. By then, many of the students wondered if they'd ever hear from or see Midoriya ever again, or if anyone else would suddenly disappear like he had. Although it felt like a kidnapping, there wasn't even a ransom note to act as a lead.

Many students, most of them in class 1-A, were inconsolable. Class 1-B, though, was hit unexpectedly hard. As Itsuka looked out across the common room, she saw everyone's nerves fraying at the edges. Tetsutetsu gazed ceaselessly out the window as if scanning for any sign of their missing classmate from 1-A. Ibara, wanting to some meaning or method of being helpful, isolated herself in her room to pray. Even Monoma lacked his usual snide confidence.

None of them knew the boy as well as his primary class did, but 1-B took his disappearance seriously. The air inside their dorm felt oppressive and thick with loss.

"I'm stepping out for a walk," Itsuka declared as she marched for the front door.

"Do you need someone to go with you?" her classmate Pony asked, using English. She was too emotionally distraught to pay attention to what language she spoke with.

"I'll be fine Pony. The teachers have made the patrols tight and we only have limited areas we can walk in, so I intend to use them." Even as she spoke the words, she understood Pony's fear. Midoriya disappeared inside a classroom while surrounded by his peers.

That meant none of them were safe.

The fresh evening air is often refreshing, especially after being stuck inside for an entire day, Itsuka observed. The air was crisp and cool, setting her skin alight with goosebumps. At any other time, this wonderful feeling would be enough to make her happy.

The mood, though, was spoiled by the whirring noise of drones flying overhead. UA's security was on high alert, after all. Despite all that, Itsuka might have wandered a bit farther from her dorm than she promised. It felt too stifling to remain in clear sight of the building. She wanted to get away, not stay in its shadow.

She wasn't supposed to wander out near the front gate, but she did it anyway. In hindsight, it was one of the best decisions of her entire life.

Flashes of brilliant green energy filled the air near the front gate of UA. Sands swirled in the air as if on a strong breeze, soldering together in the evening twilight, flashing sparks of brilliant green energy.

Was another person vanishing? Itsuka knew better than to investigate, knew the risks to herself, yet she moved forward despite her cautious self-reprimand, acting on instinct instead.

Midoriya Izuku stepped forward into existence as if he never vanished at all, as if everything was perfectly fine. The expression on his face was peaceful, happy.

He was also holding a small child with chubby cheeks and an adorable pink bow in her messy brown hair.

"Midoriya!" she called out as she ran towards him. "Everyone was so worried!"

He held his finger to his lips, ordering her to be quiet. "Hush," he whispered, loudly. "She's sleeping."

There was a spot of drool on his uniform, just under the girl's face. Itsuka had to admit to herself that the combination was adorable. "Midoriya… whose kid is that?" she asked, as quietly as she could.

Izuku's eyes sparkled when he looked at Itsuka. He was happy beyond all reason, and it looked like he'd explode from how much it overwhelmed him. "A friend asked me to look after his daughter," he said.

No one could be this happy about babysitting, Itsuka observed. Something about this felt off. "What friend? And how did you leave and come back? Where have you been?"

She might have accidentally raised her voice. Maybe. Probably. Yes.

The little girl straightened up in Izuku's grip as she rubbed her eyes. She blinked blearily at Itsuka. "Aunt Itsu? Is that you?"

Itsuka froze. What was that? Aunt? "Midoriya, what's going on?"

"Eh, well, um…" Izuku stalled. Badly.

"Papa, Aunt Itsu asked you a question," the child interjected.

Papa?! "Midoriya, explain. Now." Itsuka was out of patience. In fact, she was burning for the lack of it.

He laughed nervously. "I um, got pulled into a time travel machine?"

Itsuka's brain halted all operations. "Excuse me?"

Izuku looked at the little girl and then back to Itsuka. "Now isn't the best time to explain. I'm babysitting for a friend."

Itsuka crossed her arms. "You will explain though."

Izuku bowed his head, unable to make a complete bow while holding this child. "Yes, I'll explain everything!"

Itsuka looked at him, how helpless and lost he was. "You have no idea how to look after children, do you?"

Izuku didn't so much answer as whimper.

Sighing, the 1-B class president considered how best to help. "I deal with kids a lot at my family's dojo. She looks to be what, four?"

The child immediately puffed up like a blowfish. "I'm past four and a half, Aunt Itsu! I'll be five in three months!"

Itsuka smiled, liking this kid already. "Well, that means you're a big girl then, doesn't it?"

The child nodded.

Itsuka pressed on, "That means that you can walk anywhere, but you still need to hold Midoriya's… Papa's hand, right? Like a big girl?"

The nodding resumed with more vigor.

Izuku sighed in relief as he put the child down, taking hold of her hand before standing up. "Thanks, Kendo."

"No problem, but you'd better report in right away. You've been missing for eight hours." Itsuka warned him, hoping he'd take it well.

He winced, almost hissing as he breathed through his teeth. "Oh boy, that means I can't put off explaining this."

Itsuka merely shook her head. "Good luck!" she called after him as he wandered towards the administration office with a child in tow. "I'll come to check on you two tomorrow, alright!?"

Izuku waved back to her, as did the child with him.

Itsuka smirked while walking back towards her dorm. Izuku was back. Everything was fine, or at least it would be.

Midoriya Izuku also looked cute while caring for a kid, she observed. She turned and watched him walk, keeping his pace slow enough for the child next to him. "Cute," she mused out loud, taking in the entire image: the small hand in his, her tiny legs tottering alongside his, and his hard muscles as he walked slowly alongside her. Yes, Itsuka reaffirmed to herself, she would check on him tomorrow.

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A Note from the Author

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Hello all! You've seen me do mature writings ranging from angst to sultry. Well, here is something light, fluffy, and adorable instead. Prepare for children and their uncontrollable antics.

What kind of trouble will Izuku get in now that he's caring for a child, his child, from the future? Who is Nana's mother? How will caring for a little girl affect the way his classmates see him? Find out all of this and more as this misadventure continues!

For anyone concerned: yes, I'm aware that I'm launching two new fics before my main fic is complete with its first arc. Don't worry. All of these fics have been mapped out in advance. I'm keeping myself to a rotation schedule so that nothing lags too far behind! Once more, I also reply to all comments, both on FF and on AO3! Check the comment section a few days after you review on FF to see my mass reply!

Don't forget to check out my Discord server for updates. It's the fastest way to poke me and ask when the next chapter of anything I'm writing will be out! discord. gg/25BTet3

Thank you all for reading my fiction and wandering through my imagination. I hope you enjoy it!