I did not expect this story to get as much love as it did. I initially hadn't thought much of the idea, but after seeing that you guys liked it, I decided to start thinking about it more seriously.

As for the length, I think for this story I'll stay in the 2-4k range, in my opinion, it fits well.

Anyways, on to the chapter!

Izuku Midoriya stared down at his phone with a look of confusion, his eyes locked on a message from an unknown sender.

[Meet me in the teacher's lounge after you finish your classes for the day.]

The message was similar to the ones All Might sent him when he wanted to discuss his quirk, but Izuku had his contact saved and favorited. Additionally, Izuku rarely gave his phone number out, meaning the person had gotten his number from somebody who knew.

Taking one last look at the text, Izuku switched to All Might contact and sent a quick message.

[I got a weird message from someone telling me to meet them in the teacher's lounge. Do you know anything about that?]

While waiting for a response, Izuku looked around the classroom. The school day was about to start so the majority of his classmates were present and interacting with each other.

As he watched, Izuku became acutely aware of the tension in the air. It was understandable of course, the USJ attack had happened only three days prior. He was still feeling the effects of the attack, the most prevalent being an everpresent sense of inadequacy.

All he had really managed to do during the assault was get Mineta and Tsuyu off the boat and distract Shigaraki for a few seconds. He had failed to save Tsuyu and had been saved by her twice. He was of little help during the confrontation with the Nomu. Despite all his power, he was useless.

The buzzing of his phone broke Izuku from his thoughts. Looking down, he saw All Might had responded.

[You can trust him.]

Izuku's brow furrowed. All Might was no stranger to being cryptic, but this was different.

As he was about to press for more answers, he was interrupted by the loud voice of his class president.

"Midoriya! Phone usage is strictly prohibited during classroom hours!"

"Iida, class doesn't start for another five minutes," Uraraka pointed out as she walked up to Izuku's desk.

"Being prepared for instruction includes mentally preparing oneself for learning," Iida responded passionately. "A task made impossible by phone usage!"

"Whatever you say, Iida," Uraraka said with a small smile before turning to Izuku. "You doing okay Deku? You look a little down."

Izuku shook his head slightly and gave her a weak smile.

"Y-Yeah, just thinking about a weird text I got."

"Oh, those are the worst! Especially the scam texts." Uraraka replied enthusiastically. "Anyway, I'd better get back to my seat before Iida starts yelling again."

Izuku chuckled to himself and waved his friend off. He liked Uraraka and thought she was a good friend. Her enthusiasm was infectious and often made him smile. Plus she was the first friend he'd made in a long time.

Not wanting to invoke Iida's ire, Izuku turned his phone off and slipped it into his bag.

Whatever that text was about would have to wait.

"What does he know?"

Yagi wished to be anywhere than where he currently was. Facing Gran Torino would have been one hundred times more appealing than the conversion he was about to have.

"H-he knows O-one for All is old and that h-he is the ninth user."

"And?"

"That's all," Yagi said quietly, physically curling into himself.

Percy took a deep breath and looked him in the eyes.

"I'm going to say the same thing to you that I said to Nana."

Before he had time to react, Yagi felt himself get lifted into the air by his collar.

"WHAT THE HELL IS WRONG WITH YOU?"

Percy dropped him and began pacing around the loudly cursing in a language Yagi couldn't understand.

"I didn't think I needed to tell him about a monster I'd already taken care of," Yagi said weakly when he noticed a break in Percy's storm of expletives. "Plus what kid wants to hear that their idol killed someone."

Being dressed down by someone who appeared much younger than him was something Yagi never got used to despite how many times it happened.

"We don't know that he's dead!" Percy shouted. "There was nobody recovered and that devil has some many tricks up his sleeve he might as well shoot the moon!"

"I caved his face in!" Yagi respond passionately, suddenly filled with defiant energy. "There is no way he could have survived that!"

"The monster that attacked the students says otherwise!"

Yagi fell silent.

"Look, I get it," Percy said, his voice calmer. "You're young and like to imagine men, monsters, like him go down in one easy punch," Percy walked over and knelt before Yagi. "Your whole career is built on winning in one blow, but this is a fight you can't win that way."

"Don't talk to me like I'm a child," Yagi said tiredly.

He knew Percy was right, he'd known it for years. But he'd desperately hoped that for once his master was wrong.

"In my eyes, you are a child," Percy said with a chuckle. "But you're right, you're a man now," Percy pretended to wipe a tear from his eye. "I guess it's time I throw all those Father's Day cards away."

Despite the previously serious mood of the conversation, Yagi felt his cheeks heat up.

"You still have those!"

"Yep!" Percy replied with a shit-eating grin. "Now get out of here, your successor will be here soon and your presence will ruin my fun."

Yagi groaned and stood up from the couch, the remnants of his embarrassment fading away.

"Go easy on the kid, he's jumpy."

Percy waved his hand dismissively.

"I know, I know. Just go already."

Yagi nodded and made his way to the door.

"And one more thing."

Yagi looked over his shoulder to see a scowling Percy.

"This conversation isn't over."

"Yes sir."

Yagi quickly prayed for his successor.

He might need it.

Izuku stood in front of the door to the teacher's lounge.

His whole day was spent speculating who the meeting was with, yet he'd come up blank. No matter how many different ways he looked at it, he couldn't think of a single person who would have access to his number and want to meet him that he didn't already know.

The question of the meeting had almost been enough to distract him from the weird way his teacher was acting. Every time Aizawa had looked at him that day, his expression had been a mixture of understanding and distress.

Deciding to ponder his teacher's strange behavior later, Izuku brought his hand up to the door and knocked. Almost immediately he got a response.

"Come in."

Taking one last deep breath, Izuku entered the room and was assaulted by an overwhelming feeling of familiarity and familial affection. Pausing for a second to regain his bearings, Izuku scanned the room and found the only other person in the room.

It was a man, no older than twenty, lounging on the couch farthest from the door. He had his arms spread over the back of the couch in a way that spoke of a lazy confidence. Like he knew he was great, but felt no need to demonstrate.

The man himself was far from what Izuku was expecting. He could tell the man was tall, at least a good twenty centimeters taller than him. His face screamed a mixture of American and something else Izuku couldn't identify. His vibrant green eyes were barely obscured by his messy black hair. He wore a faded graphic tee and jeans.

Overall, when compared to some of the strange people that occupied Japan, the man looked average.

"You gonna keep standing there and analyzing me or are you gonna sit down!"

Izuku's eyes widened before he hurried to take a seat, the man's eyes following him the entire time.

"Well I'm sure you've got questions," The man said as soon as Izuku was seated. "But first two things. One my name is Percy Jackson, call me Percy, and I'm a friend of All Might. Second, may I see the Hero analysis notebook you currently have in your bag?"

Izuku blinked a few times as he tried to process what had just happened.

The feelings he'd gotten when he entered the room, while muted, were still very much present. It confused Izuku greatly. How could he feel like the man was family when he'd just met him?

Additionally, the man knew about his journals and wanted to see them. And Izuku had no problems with it!

"I-uh, sure," Izuku sputtered as he dug around his bag pulled out his notebook, and handed it to Percy.

Percy took the notebook with a grateful smile and started flipping through it, leaving Izuku nothing to do but watch the man.

Ignoring what was happening with his emotions, Izuku found Percy weird, even by his standards.

He was obviously not of Japanese descent but made an effort to clarify he wanted to be called by his given name. Percy seemed too young to be a friend of All Might but somehow had gotten his number.

Looking closer, Izuku was able to see that on Percy's shirt was a hero who, if He was right about Percy's age, died about forty years before Percy was born.

"Well kid I have to admit I'm impressed,' Percy said suddenly. "About ninety percent of what you got in here is accurate, but I do have one question."

Percy flipped through the notebook before stopping on the page for the number two hero.

"What's up with the number five next to my name? I looked through the entire book and no other page has it."

Izuku's eyes widened dramatically as a wide smile stretched across his face.

Finally, someone noticed! He finally got to talk about his theory that most hero forums declared too wild.

"It's because Wavebreak is the fifth in a line of heroes going back to the first official hero!"

Izuku grabbed his bag and pulled out the notebook he'd specifically dedicated to his theory. Showing the book to Percy, he started flipping through the pages.

"There have been five heroes including Wavebreak that all have very similar if not identical quirks," Izuku exclaimed happily, his previous wariness of Percy forgotten. "Not to mention, with the exception of Blackjack, all of their hero names are ocean-related."

"Yeah I don't know what I was thinking that time around," Percy replied quietly.

Izuku ignored him and kept flipping through the pages.

"Additionally, all five heroes have been extremely important to hero society as we know it! Riptide was the first publicly recognized hero, Typhoon helped establish Tarturus, and Marine was the first number two hero!"

"Ok, so far all you've given me is a list of coincidences," Percy said, his voice full of amusement. "What is connecting them?"

Izuku flipped to a page with a timeline drawn out on it.

"All of them operated for about twenty-five to thirty years before announcing retirement and being replaced by the next hero about five years later," Izuku said seriously. "That's not unheard of, but what is interesting is that the replacement hero was always unheard of. No school could claim them and no one ever found out what their true names were."

"What's your conclusion then?" Percy had a wide smile on his face.

"I think it is a single family that has been operating as heroes and that they hide their identities for protection and privacy," Izuku declared with finality. "It is the only explanation that makes sense."

Percy stared at Izuku for a moment before bursting out into laughter.

Izuku watched as Percy laughed at his theory and shrunk into himself. Why did he expect any other reaction? Every time he shared it he was ridiculed and called delusional.

Looking down sadly, Izuku grabbed his notebooks and put them back in his bag.

"Man kid! That was impressive!" Percy exclaimed after laughing for a few moments. "I can't believe after all this time it's a kid that came the closest!"

Izuku looked up with a shocked expression.

"What?"

"I mean, I know I'm not the best at being sneaky, but being found out by a kid is a new low for me!" Percy said happily, wiping a tear from his eye as he looked at Izuku.

"What are you talking about!?" Izuku asked desperately.

Percy knew something, Izuku was sure of it. There was no way he didn't.

"Kid, all those heroes weren't different people. They were me!"

Izuku felt as if he'd been punched.

"H-how?" Izuku pleaded. "You'd have to be over two hundred years old!"

"I am, not sure how old exactly though. I lost count at some point."

"Prove it!"

"I can't prove it," Percy said with a sigh. "But I can do this."

Percy reached under his shirt and pulled out a necklace. He tapped the necklace twice and from it came metal which spread across his skin. After a few moments, amour covered the entirety of Percy's skin.

Before Izuku stood Wavebreak.

"Oh my God it's Wavebreak," Izuku mumbled under his breath, desperately trying to avoid passing out.

"Does this help prove my story?" Percy asked, his voice sounding metallic through his helmet.

Izuku nodded numbly.

He was in the same room as Wavebreak! He was alone in a room with Wavebreak. He knew Wavebreak's true identity.

"I think I'm in heaven," Izuku whispered to himself.

"Alright kid, I got a few things to tell you before you go," Percy said, his voice becoming less metallic as his suit deactivated. "I didn't ask you to come here just to reveal my identity to a random kid."

"R-right."

"First, nice job on the beach. I've been meaning to clean Dagoba up for a while, I've just been busy. So thank you," Percy said, his tone one of gratitude. "Second, your control of One For All is absolute shit and I will be working with you on it since Yagi doesn't know how."

"How do you know about One For All!" Izuku shouted suddenly.

How did he know? Had he let it slip? Had he already messed up?

"No need to shout kid jeez" Percy complained. "But to answer your question, I know about it because I'm old and because I was personal friends with every user before you."

Izuku's eyes snapped to Percy.

"You were friends with them?"

"Yep! I'd go as far as to call them family."

The feeling Izuku felt when he entered the room initially came back with intensity. He had so many questions, but the mental whiplash he was feeling made it hard to think.

"Now I have one more thing to tell you, but it's gotten late and I'm sure your mom is worried about you," Percy gave Izuku a mischievous smile. "Plus I think it would be more fun as a surprise."

Izuku nodded, noticing for the first time how dark it was outside and how tired he felt.

"Well kiddo, I'll see you soon. Now leave, I gotta figure out what I'm gonna do for dinner."

Izuku grabbed his bag and walked out the door without another word.

He needed a full night's rest before he even tried processing his meeting with Percy.

I know I said that I'd include class 1-A's reactions to Percy in this chapter, but this felt like a more appropriate endpoint. Plus that means I can lump their reaction with their first class with Percy.

'Til Next Time!