Summary: When you become a hero, you must be prepared for whatever life throws your way. No matter how crazy. "Holy whoa, I really am All Might's secret love child!" AU where Midoriya is All Might's son.

Teaser Link: https/halfafand/art/Like-All-Might-Like-Small-Might-Teaser-805859885

Cover Art Link: https/halfafand/art/Like-All-Might-Like-Small-Might-Cover-Art-816608828?ga_submit_new=10%3A1570949685

HalfafanD: Yes, I'm throwing my hat in the 'Midoriya-is-All-Might's-son-AU' ring, except I'm adding my own little twist. Even though I highly doubt that this will become canon, it is a fun concept to explore. Dad Might is just the best. Don't worry, I won't be changing things up much. Only so that not only would everything be left mostly untouched canon-wise, but also so that I can expand upon that father-son dynamic those two got going on.

Also note that if you haven't read the manga, go read it NOW! Otherwise I'm gonna be spoiling EVERYTHING right out the gate.

Another thing is that this is my first My Hero Academia fanfic. I have read everything in the manga up to Chapter 245. So I'm not going solely of the anime if the spoiler warning was any indication. I'm someone who strives for accuracy and has deep respect for many fandoms so apologies in advance if I get some things wrong or if I have some OOC leaking through. I'm a devoted fan already but have only been so for about a few months. Still, I hope you all enjoy.

Rating Warning: This story has been rated T for slight mature content. Now while that means suggestive themes meant for older audience members, it's your choice whether to read this story or not. It's you who chooses your own maturity. So if you don't like it, I'm not stopping you from leaving this story. Reader discretion is advised.

Disclaimer: As awesome and cleverly written this unbelievably badass manga/anime is, it's not mine. All credit goes to Kōhei Horikoshi. Though I do sincerely hope that this fanfic, along with any others I may write in the future, live up to this amazing story's standards.

Like All Might Like Small Might

It was a calm sunny day at U.A. High School. After everything that has happened in the last few months (the USJ, Hosu, Kamino, and most recently Overhaul), it was nice to settle back into normal school stuff.

Normal school stuff, as in, a school-wide festival. And although it was mainly for the support and general studies classes, Izuku Midoriya was excited to participate. The class in full swing alongside him as they planned for their class event.

It really was a great idea on both Mina and Jiro's part to do a dancing and singing performance. Izuku didn't know what their class would've picked if it wasn't for Iida's suggestion on them doing something fun and stress relieving. Everybody on campus desperately needed the break.

Mina squealed. "Oh this is gonna be so much fun! I can't wait until my friends from middle school see this!"

"Really?" Kirishima rubbed the back of his neck. A nervous reaction despite the small laugh he gave off. "I don't really want my old buds seeing me out on a dance floor struttin' my stuff. Pretty sure I'd give them all heart attacks. I'm not really cut out for dancing. It's kinda embarrassing really."

Ojiro raised a brow. "You're on the planning committee though. You won't be on stage."

"Yeah, and that's the whole reason I'm working behind the scenes. I got two left feet, man. Badly."

"But what if you went out there and danced anyway? It'd be pretty manly of you to face your fears." Kaminari suggested grinning.

"No way! How dare you throw those words back at me!" The red-head exclaimed, appalled. "Don't disrespect the god of manliness!"

"But isn't the point of dancing having fun?" Toru asked innocently. If her quirk wasn't invisibility, the class would've probably noticed her head being tilted to the side in an inquisitive manner, as her doe-like eyes shinning like glittering sparkles often seen in anime tropes. Sadly they instead had to rely on their imagination.

"Nothing's fun about getting laughed at when you trip on-stage." Sato replied, fully serious.

Iida huffed. His arm flying out in emphasis. "Regardless, we already have too many dancers as it is. Not to mention barely enough people working behind the scenes. With Kirishima's strength it'd be much wiser to have him assist in planning and construction."

Sero snorted. "You make it sound like we're building a house."

"No, but seriously guys." Mina spoke up again, getting back on topic. "I can't wait until our friends and family come see us on stage."

Tsu nodded. "After everything that's happened, it'll be nice to see our families."

Uraraka blinked, giving a small frown. "I don't know guys. With all the crazy attacks, would anybody be let into the festival?"

"I hope so. I was looking forward to my parents visiting me." Yaoyorozu said, placing a hand on her cheek, a tad nervous.

"Not mine." Jiro commented. "My dad can be a bit embarrassing sometimes."

"Well in any case," Sero piped up. "We all know that Todoroki's dad'll be able to come. Him being the new number one hero and all."

"Dumbass!" Bakugo snarled. The hot-head had been mainly quiet for most of the free period, his position in the performance already set in stone. But class was class, and he'd be damned if someone took him off the drums. Forget about it being stupid, no one took him down from a position. No one. "The top ten list hasn't even been published yet!"

"But he was the number two hero before." Kaminari reasoned. "And with All Might out of the picture and the list not updated yet, that puts him at the tipy-top."

"Either way, he won't come." Todoroki affirmed. "With all that's happened he'll be too busy working in All Might's place."

Izuku turned to duel quirk user. "How is your dad by the way?"

Endeavor, no matter how powerful or furious, was also a very passionate and driven man. He knew Todoroki had come to terms with the abuse he and his family suffered. But he also knew the reason behind it. The man wanted more than anything to surpass All Might, and now that achievement was taken away from him while the title was handed to him on a silver platter. An empty victory.

Todoroki shrugged. "Don't know. But I'm sure he's furious about how All Might is retiring."

"I'll bet, man." Kirishima agreed. "Dude's a legend. And to suddenly have him retire after all that; my folks were pretty upset too."

"Whoa, really?" Jiro asked, a bit surprised. "I would've guessed he'd be like my dad. You know, going on and on about how hardcore he was."

The red-head shook his head. "Nah, my folks are pretty plain."

"How plain we talkin'?" Kaminari gaged.

Kirishima shrugged. "Both of my parents are office people. Only difference is that my dad's a bit higher up in authority. Not by much, but still."

"I feel ya, man. My dad works at an electric plant. Not a glamorous job, but it's ideal for someone with a quirk like what my family's got."

Sero turned to one of the larger students. "What about you, Sato?"

"My pop works a gym. He's a professional trainer. Though he mainly specializes in body-building."

"Whoa, no wonder you got into U.A.!" Kaminari exclaimed. "You must've had your dad train you."

Sato smiled, a tad sheepish. "Yeah, but not by much. He just wrote down some tips and guidelines for me."

"Still awesome!" Kirishima then put on his best begging pose. "Please have your dad teach me his manly ways!"

Sato sweat-dropped. "Uhh... why don't you ask him when he comes to visit."

"Yeah, I can totally see your dad goin' nuts over all the exercise we do here." Sero grinned. "Though mine would totally feel out of his element."

"What makes you say that?" Tsu questioned.

"My dad's a writer. A novelist if we're going into specifics. Guy almost never leaves his office. Mom always has to drag him out of the house to all those social gatherings and book signings."

"Oh my gosh!" Toru squealed. "I totally have this image of your mom pulling your dad's ear as she's dragging him out!"

Kaminari laughed. "Oh man! that's too much!"

Mina giggled. "My parents are like that too. Dad's always making funny jokes to make us laugh. He's never failed to brighten our day."

"My parents are wine sellers." Aoyama supplied. "Best wine in the country."

Ochaco smiled. "Both of my parents are pretty far away. Before the dorms, I was kinda living on my own in order to get to school. They both run a construction company so they don't make a lot. I don't know if they'll be able to come." She then turned to Izuku, who seemed to be staring off, lost in thought. "What about you, Deku?"

Midoriya's head snapped up. "What?"

"Are your parents coming to the festival?"

"W-Well, I don't know if anybody outside the school could come. But if possible, I'm sure my mom would want to visit. Though she'd probably have to ask her boss."

"Is she an office worker too?" Mineta asked.

The freckled boy nodded. "Something like that. After that incident at the mall and what happened at camp, she's been pretty worried. I'd like her to come see that it's all more good than bad here."

Kaminari smirked. "A mama's boy, huh?"

Izuku flushed.

Sero bonked the blonde over the head with his elbow. "Oh like we all haven't been there." He too then smirked. "Didn't your mom call you her little Pikachu?"

The class erupted with laughter.

"Dude! You promised to never tell anyone that! What happens at sleepovers stays at sleepovers!"

"What are we, chicks?" Mineta scoffed, grinning. "It's your own fault for suggesting your house for our study session in the first place."

"I think it's admirable for Midoriya to show such love for his mother. He's a model son." Iida complimented. "I'm sure she would be delighted to come see how you are faring here. And I'm also sure my own mother would love to meet her."

Uraraka beamed. "Yeah, let's have our parents meet each other!"

Izuku nodded, smiling back. "Yeah, I've told her about you guys. She'd love to finally meet you."

"What about your dad?" Mineta asked. "What does he do?"

Izuku froze.

Sero blinked. "Yeah, you haven't told us about him yet. Is he coming?"

"Umm... I-"

"You know, come to think of it," Kaminari spoke, scratching his head. "You haven't mentioned your dad period."

Iida held a hand to his chin in thought. "Does he work oversees or something?"

By now, the young greenette was looking completely dejected. His head hung low, staring at the notes he had taken in class. Though his mind was a million miles away.

Uraraka frowned. "...Deku?" She asked worriedly.

"How dumb can you losers get? " Bakugo scoffed. "All the shitty nerd talks about is his mom and you ask about his fucking dad? That asshole left them years ago."

"Kacchan!"

"Fucking coward dumped his mom and hightailed it out of there. Honestly, you shitty extras should've caught onto that by now." Another scoff. "Some lame friends you are."

Silence enveloped the room. Everyone staring at either Bakugo for his revelation, or at Midoriya for being the subject of it. All surprised at the implications.

Why didn't they figure it out? In all the times they were at school, hanging out, and now with them living in the dorms; Midoriya (while still open in many cases) was often very scarce with the stories he told. Though he did talk about his mother a lot. How good of a cook she was, and how her and Bakugo's mom were good friends leading him and Kacchan to being raised together. But since the day they all each met Midoriya, he never once mentioned his father.

"...Deku?" Uraraka asked again. This time, her words carried more weight. "Is that true? Did your dad really leave?"

Immediately Deku sprung to life, arms flailing. "No! No, no, no, no! I mean, yeah. What Kacchan said is true. B-But it's not as bad as he's making it sound. Really!"

"Dude, your dad bailed on ya." Kirishima spoke softly. Fully serious. "How is that not bad?"

"Yeah, man." Kaminari nodded. "So not cool."

"Well..." Midoriya tried to find the words. "I was still very little when he left. I hadn't even turned four yet and it was already just me and Mom."

They easily caught the hidden message beneath. 'He didn't even stick around to see what kind of quirk I'd get'.

"I was too young to really understand what had happened. I never knew my dad so I never really thought about it. All I know is that his quirk is breathing fire. I've asked Mom about him before but whenever I did she'd get so sad. Eventually I just stopped asking. Because at that point I was old enough to realize that he'd left us. But I also never wanted Mom to get sad like that again so I never brought him up again." Midoriya then gave them a small smile. "So really, it's ok. We pulled through with just the two of us so we'll be fine."

The room fell into silence once again. All wanting to say something, but didn't know how to say it. But Tsuyu, always the level-headed one, stepped up.

"So, in other words, because your dad left when you were still really young, you never got to know him let alone form a close bond. So you didn't get hurt as bad when he did leave."

Midoriya nodded.

Tenya took a breath. "Well, I suppose it could be worse. But even so," He began, before flailing his arms like Midoriya earlier. Though his movements were more precise. "I cannot condone the actions of such a terrible man for abandoning his wife and child, leaving them to fend for themselves! It's a father's duty to create a safe stability for the family and provide a form of guidance and identity for the child and to support them even in times of struggle! The fact that Midoriya's father did the exact opposite is despicable!"

"Yeah!" Kirishima cheered. "You tell 'em Iida!"

"I'll zap him 'till he passes out!" Kaminari exclaimed.

"I'll melt him with my acid!" Mina joined in.

Hagakura raised her sleeve. "This cinnamon-roll must be protected!"

"I'll pound him into the ground!" Sato roared.

Sero grinned. "I'll tape him to the top of Tokyo Tower!"

Shoji raised a brow at the tape hero. "That sounds pretty tame compared to the others."

The teen's toothy grin only widened. "...Upside down in his underwear."

"Only if I get to use him as target practice." Bakugo smirked, his hands sparking. "I'll blast him off that tower and plummet him into hell."

Tsuyu hummed. "Bakugo's sure fired up. Do you want to protect Midoriya too?"

"Shut up! My mom's been waitin' to burn his sorry ass! All I've ever heard is how shitty he was so I'm gonna return the favor by killing him!"

Aww... many of the girls cooed. He does care.

"Mind if I join you?" Todoroki asked politely. Not surprising. Midoriya had stood up to his father during the sports festival. It was only fair he'd return to favor. "I can freeze him and then burn him alive. The rapid change in temperature should make his arms break off."

"Can it Icy-Hot!"

Izuku sat there, flabbergasted. Everyone, shouting about how they're gonna turn his father's insides outward and feed his intestines to the various blood-thirsty animals Koda vowed to sick on him. Sure it was nice that his friends cared enough to want to protect him, but things were getting out of of hand. He had to do something, fast.

"Whoa, hey, wait a minute!" Midoriya waved. "Isn't this a bit excessive?"

"Indeed, are we not striving to be heroes? Pillars of justice?" All turned to Tokoyami. His level tone quickly drawing their attention. The bird had mostly kept to himself, much like Bakugo earlier. As one of the class' many voices of reason, it only made sense he'd speak up now.

"Honestly," He scoffed. "You're behaving like children. We don't even know where Midoriya's father is much less how to locate him. It would be senseless to go attacking blindly in search of him. We're better than that."

Izuku sighed in relief. His faith in his class restored. Finally. "Thank you, Tokoya-"

"However if we were to somehow discover his whereabouts, I would use Dark Shadow to drive him into the very pits of darkness. Tearing away at his sanity." He gestured to the black mass behind him.

Dark Shadow's eyes gleamed as it laughed. "Just let me at him. I'll tear him apart limb from limb."

Izuku's smile fell. Since when did his classmates become so vengeful?

"Leaving Deku and his mom is unforgivable!" Ochaco growled. Her eyes fired up with the darkest look. Much like before the sports festival. "I'll hurl him all the way to Saturn!"

"Uraraka too?!" Midoriya cried out in alarm.

"Woo!" Mina cheered. "You go girl!"

Izuku moaned, his face now in his hands. "This is insane."

"Before you kids start planning any murder schemes, you should finish your preparations for the school festival."

The class, startled, all turned to the front. They knew that dead dreary voice all too well.

Aizawa continued to give his class a deadened stare. Standing by the chalkboard, leaving the class to wonder how they didn't see him earlier (Though many could already guess, seeing a familiar yellow sleeping bag peeking out from behind the podium).

"And to answer your question; yes, your families will be able to come visit during the school festival, as well as the festival being open to the public. The school will just be increasing security. It'll be much more thorough than during the sports festival."

How much did he hear? The class had to wonder.

But their teacher wasn't done. "However, in light of both the incidents and the school's decision of moving you all into dorms, many of the parents are expressing concerns on wanting to know what's happening. While no doubt you kids have been updating them on your phones, seeing their child in person would be better."

That was true. Due to the increased security, no one outside had any inkling as to what went on on school grounds. It was also due to the extra precaution that visitors were practically forbidden unless they had special clearance from the principal.

"That's why, two days before the festival, the school will be holding a special open-house of sorts. Your parents and family members will be able to visit the school and attend class with you as normal class continues. This is the case for all the students, not just class 1-A. Think of it as like your own Parent's Day."

"Sweet!" Kirishima exclaimed. "I can't wait to show them Red Gauntlet!"

"Your parents will all receive letters in the mail much like with the dorms. Each contains a slip for them to fill out detailing on who from the family will visit and how many will show. This is mandatory. Without filling out the proper information and sending it back to us, your parents will be unable to attend until during the festival. Be sure to tell this to your parents. Do I make myself clear?"

"Yessir!" Rang the class in unison.

"Good. Now with that out of the way, Present Mic can start English class." And almost as if on cue, the classroom door opened to reveal the blonde.

"YO, WAZZUP, YOUNG LISTENERS! HOW'RE Y'ALL DOIN' TODAY!"

He was met with silence.

Aizawa not even bating an eye, grabbed some papers and his sleeping bag. "If anybody needs me, I'll be in the teachers lounge... sleeping."

And just like that, once Aizawa was out the door, Hizashi set his own papers onto the small podium and English class began.

Izuku was always one to pay close attention, his determination to become a pro hero driving him to taking excessive notes in class. But today, his mind was elsewhere. Still thinking about what his class talked about just moments ago.

His father. Just like he'd told his classmates, Izuku never new anything about the man. The only reason he even knew about his dad's quirk was because he'd begged his mom to tell him. With him still waiting to see what quirk he'd get, he wanted to know what quirks his parents both had.

Why did his dad even leave? Was it because his son turned out quirkless?

No. If it were that then Izuku would've at least gotten to know the man. Maybe it was something else.

These questions continued to plague Izuku's thoughts. His mind running through all possible scenarios as to way his father decided to up and leave.

Maybe he should ask his mom about this. He knew the subject always upset her, but he had a right to know. Sure he could always call her, but this wasn't really meant to be discussed over the phone.

Besides, it had been a while since he had seen her. No doubt she was worried. It'd be nice to see her again.

But it wasn't like he could just waltz off school grounds. He'd probably have to ask All Might for permission. Maybe he could ask him if he could deliver the slip in person. Or at least tell her about it himself face to face. That way he'd take care of the slip, assure his mom, and be able to ask the questions he needed to.

Mind made up, Izuku quickly delved back into his intense note taking, making a mental note to see his mentor after school.

That just left getting through the rest of the day.

HalfafanD: And there you have it. I know it's not much, but it's a prologue. What do you expect?

Speaking of that word, random thought: you know how the British spells things differently than the US? Well I know both of the spellings for a lot of the words, but regardless of me being an American, I just stick with what I think fits best. For example, I think "colors" works better than "colours" while I think "prologue" is better than "prolog". As for "gray" or "grey" I really don't care so I get the two mixed a lot. I never really ever came across a situation where my teachers marked me for spelling things the British way, but I sure hope that I don't come across anybody like that in the future. "YOU'RE AMERICAN SO SPELL IT THE AMERICAN WAY!!!"

But I'm rambling, back to the main point.

As I said at the beginning of this chapter, this story is gonna be rated T. The mature content isn't overly graphic or anything and there aren't any gore or sex scenes. But there are mentions of the word sex and the word sperm is thrown around a bit. I can't get into too many details but I just wanted to give you guys a heads up for what lies ahead. Anything mature will be held in a casual or exposition manner so there's really nothing to worry about.

BTW, Parents Day is a real thing in Japan. I don't know what it's called in Japanese, but that's what they call it in the English Dub. It's like what we have over here with Open-House except the parents get to hang out with their kids all day. Sort of like a 'bring-your-kid-to-work' day only backwards, 'bring-your-parent-to-school' day.

There also is of course Bakugo's swearing but that's just Bakugo. It wouldn't be him without it so I'll keep it in. Do be warned though that he will be dropping the F-bomb a LOT, I know he doesn't in the anime but he does in the manga so I just want to stay true to form. But swearing's bad guys. *wags finger in 'tut, tut' manner*

Anyway, that's it for now. Please follow the story if you enjoyed it and please review to tell me what you think. No flames though. But a little healthy criticism never hurt anyone. And since there's been so many takes on this head-cannon, by all means, leave a comment to guess how exactly you think I'll write All Might being Midoriya's biological father. Come on, guess!

See you next chapter!