Groggy eyelids opened to reveal an old lady and a homeless-looking man, both sat at either side of the bed.

"He's awake," the woman said, scooting further towards his side. Her head lowered so they met eye-to-eye as she asked him, "How do you feel?"

"Fine," he replied.

That seemed to let her relax a little. She motioned to the homeless man that it was his turn to say something, but the sour look on his face gave the impression this whole situation wasn't worth his time.

After a sigh, he glared at the young boy who was moving to sit up against the wall. "What are you doing here?"

The boy froze. That was a question he couldn't answer, even for himself. What was he doing here, and, even more troubling, where was he in the first place? It seemed like an infirmary, but that gave him more questions than answers.

"We're not going anywhere until you answer me," the man said.

"I don't know," he finally answered, breaking eye contact as his eyes fell to his lap, clasped hands resting on top of it.

Surely, there must be some sort of clue as to what brought him here. What was he doing before? Did he get injured, and was brought into this room? He didn't know, and that was an extremely unsettling thought.

"Alright," the man said. "Who are you, then? Tell us your name."

My... name? the boy thought.

Something was very, very wrong.

He shot out of the bed, shoes pushing off the ground as he jetted towards the window to find any sense of familiarity. But, before he could reach it, something wrapped completely around his body and yanked him back, forcing a gust of breath out his mouth.

"Aizawa! He was just in a hospital bed!" the old lady hissed.

"And he just ran off like he wasn't hurt in the first place," the man, whose name was apparently Aizawa, retorted. "We can't take any chances. Especially with everything that's already happened."

Aizawa turned his attention back to the boy who was currently struggling to break free from the tight grip of his scarf. "I'm going to ask this one more time," he said, forcing the boy to meet his cold stare. "What is your name?"

It felt suffocating; the scarf and the questions. He was being backed into a corner with virtually no idea of how to escape when it should be easy. After all, who doesn't even know their name?

The boy scoffed. "I don't know. And if you ask me any more questions, I'm probably not going to know, either. So, can you let go of me now?"

A moment of hesitation, and Aizawa lifted his scarf from the boy. A frustrated grunt escaped his mouth, one hand pinching the bridge of his nose and the other on his hip as if he'd just gotten a headache. "Kid," he said, "you have amnesia?"

The boy slowly nodded. That would make sense—why he couldn't remember where he was, his name, and everything else. It unnerved him that he potentially lost his entire life's memories for some unknown reason, but that wasn't what was important right now.

"I'll try to jog your memory, then. Ever heard of the League of Villains?"

He shook his head, almost laughing. If a stupid sounding name like that would have brought his memories back, he'd be better off staying an amnesiac.

"Maybe we should take this to the police station. They'd be able to find his legal guardians," the old lady recommended.

"And we're gonna ignore the way he appeared out of thin air in 1-A today? Something tells me this has to do with more than helping some lost kid."

"Then what? You're gonna take him to Nezu?"

"If that's the fastest way to get him off my hands, then sure." Aizawa gestured for the boy to follow him outside the infirmary, before the woman said her goodbyes.

She looked to the boy, sympathy filling her eyes as she softly smiled. "If you don't feel well, you can always come back here."

He waved her off. "I don't need to be coddled, old lady."

Stepping out the door, he could almost hear a small "brat" from inside the room.

That was the first time he smiled after waking up.

"You are Yuu from now on!"

"...Like the school's name?"

"Correct!" the rat-bear-dog whose name was Nezu said, who voluntarily assumed responsibility in assigning the amnesiac's new and (hopefully) temporary name.

Entering the office with Aizawa, who he'd learned was actually a teacher (no wonder he looked so sleep-deprived,) he didn't know what to expect. He hadn't even known he was in a school until Nezu introduced himself as the principal of U.A. High School, which was apparently a school meant for teaching children how to become heroes. And to become heroes, they had to work on their quirks... quirks?

"It is quite unusual that you remember simple basic concepts and social constructs, except for the existence of quirks," Nezu said from his clearly oversized leather chair, "but there is no point in discussing the intricacies of memory loss. For now, we must make arrangements for your stay with Aizawa."

Yuu glanced at Aizawa, catching him jolt upon hearing those words. Oddly enough, the sleep-deprived teacher looked more awake than ever.

"I'm sorry, what?"

Nezu's signature smile never faltered, but there was something dark swirling in his beady eyes. "You heard me. Until we clear his status as a threat, he has to stay with you. He does not know what his quirk is, so if it is something dangerous, you are the only one who can stop it." He raised his hands (paws?) and produced one solid clap. "You are the best man for the job!"

Aizawa was about to argue, but Yuu quickly interrupted, slipping his hands out of his pockets. "Hey, you think I'm a threat?"

"Absolutely!" Nezu said a little too brightly. "With all the villain activity jeopardizing U.A.'s staff and students' safety, we must take every precaution."

"Nezu, I'm a teacher," Aizawa said, "I already spend more time with these kids than I want to, and now you want me to babysit this damn brat in what's supposed to be my time off?"

"I don't wanna stay with this homeless guy, either," Yuu teased. "He's just gonna keep throwing his scarves at me if I try to do anything."

Aizawa grimaced. "I wouldn't have done that if it didn't look like you were going to escape out the window. And don't call me homeless," he said, the second sentence substantially quieter than the former.

"Stupid," he drawled, "I was just gonna look—"

"Okay!" Nezu loudly interjected, ending the argument early. "I see we all have our disagreements on the matter. If anyone has any better ideas, please come forward, as I would love to hear them!"

"I have one," Yuu immediately said. "Let me go out on my own. Homeless guy doesn't have to watch me, and you don't have to worry about me anymore because I don't plan on staying around here."

"Nope!" he rebounded. "I already said we must take every precaution with any threat appearing in our school."

"Why am I a threat? I haven't done anything wrong."

"Correct. It is not every day a child with no memories comes upon our campus, and if things were different, we would send you to the police station for your guardians to pick you up. However!" The exclamation almost made him jump. "Aizawa here says you appeared out of thin air, right in the middle of his classroom."

"Appeared?"

"Oh, I think Aizawa himself should describe the sight!"

Yuu turned his head towards the teacher, who was already looking at him with hesitance. A grand sigh came from him, then said, "In the middle of class, there was a... whirring noise. All of a sudden, a dark purple haze came from the middle of the room. I ordered my students to stand back, and what we saw was what looked like your body slowly appearing on the ground, starting from your feet and ending with your head.

"It wasn't a portal. It was more like you were being printed. But the haze was similar to what the villains we're currently trying to catch use, so you have to understand why we assume you're a threat."

"Whatever," Yuu said, hands moving to hold the back of his head. "Homeless dude, you don't wanna watch over me, too, right?"

"Brat," he said. "Of course not. I hate the idea for obvious reasons, but Nezu won't have it any other way."

"I am open to other options, Aizawa," Nezu corrected, "I just believe this is the best one." He turned his attention to Yuu. "You will go along with this, won't you?"

Part of him wanted to whine even more, but that rat was getting on his nerves. Agreeing would get him out of the room faster, so he gave him a small nod. That seemed to satisfy the creature.

The rest of the conversation discussed the general rules he'd be under while Aizawa was watching him; basically, other than inside his home, Yuu was to be supervised 24/7.

What was he, a child?

He couldn't hold himself back from loudly exclaiming his distaste for the rules, but nothing changed, to his misfortune.

Once everything was settled with the principal, Yuu and Aizawa walked into the hallway.

"What happens now, Homeless-sensei?"

"Lunch," he answered, then shot him a dirty look upon hearing his jest. "You still haven't properly addressed me ever since you learned what my name is."

Yuu chuckled. "So?"

He made no reply. He did not want to exert effort in arguing with children.

"AIZAWA-SENSEI!"

A student came running down the hallway, charging right for the pair. He suddenly stopped in his tracks as he took in the sight of Yuu, arms oddly resting at robotic right angles. As he spoke, those right angles frantically moved vertically.

"Ah, you are the boy I helped carry to the infirmary!" He deeply bowed, which coincidentally was also at a right angle. "My name is Iida Tenya, 1-A's class representative. I hope you are feeling well, now that you've visited Recovery Girl!"

So that was the hag's name.

"Nah," Yuu said, a hand behind his head as he looked off to the side, "I didn't need her help."

"What?!" he blurted, continuing to utter unrecognizable interjections. "You appeared unconscious in our classroom! What if it was more serious than that?"

Yuu shrugged. "I've been through worse."

That was a complete lie since he couldn't even remember anything before he woke up in the infirmary. But what was strange about it was that it didn't feel like a lie. The phrase came to him naturally, and it rolled off his tongue before he had time to even think about it. Had he actually gone through something more dreadful?

Iida wasn't having any of it, though, as his arms somehow stiffly flailed about, brows knitting together in incredulity. "Well, you seem awfully confident! What, you don't need help? You don't care about any potential danger because of what you've gone through before? Well! I..."

He heard Iida continue to chastise him, but he didn't register his words as something in the distance caught his eye. It was a student with his back turned to him, but there was something... familiar...

Yuu ignored Iida and started towards the boy in the hallway. He could feel there was something in his mind that was begging to reach the surface, as if it was submerged in the ocean of his subconscious, waiting to grab a lifebuoy.

He was just a foot away from his dark green haired lifebuoy.

Dark green hair...

A high-pitched childish voice presented itself in his mind, playfully shouting a word he couldn't recognize.

"K...ua..."

He firmly planted a hand on the boy's shoulder.

"Killua!"

The student shuddered as he turned around, nervously facing him with big green eyes scanning his every move.

No, he was wrong. He's not what he was looking for.

"H-hello?"

But he did help him remember one thing.

"O-oh, you're the boy from this morning... Are you okay...?"

Iida and Aizawa had been following him from behind while he was approaching the student, paying close attention to his sudden change from a cool demeanor to one of quiet pursuit. Slowly removing his hand from the boy's shoulder, he spoke.

"My name is Killua Zoldyck." He turned to face Aizawa. "Not Yuu."

Aizawa had an unreadable expression on his face, but before Killua could attempt to decipher it, the stuttering boy started to speak.

"Nice to meet you... er... Zoldyck!" the student said, bowing, "I'm Midoriya Izuku!"

Killua almost scoffed. Did everyone here go by their last names? Actually, everyone here had names he found to be distinct enough from what he was used to. Maybe that meant he came from somewhere with different naming conventions.

"Call me Killua," he said. "I don't like my last name."

There wasn't a reason he could think of for not liking it. All he knew was that it gave him the same feeling as when he let it slip to Iida that he'd been through worse things than amnesia and being unconscious after getting "printed" into a random classroom.

Midoriya heavily blushed, spurting nonsense, in turn puzzling Killua.

"Are first names uncommon, or something?"

"No," Iida said, "but they are mostly used by those closest to them. I would ask if you're a foreigner, but your Japanese is perfect!"

"Japanese?" he questioned. That couldn't be right... everyone here spoke the same language, but it definitely wasn't Japanese.

"Alright," Aizawa said, albeit a little irritatingly, "Zoldyck and I are getting food before we leave, so if you could move out of the way, I'd appre—"

"We're getting lunch right now!" A newcomer butted into the conversation, already teeming with bubbly energy. "I'd love for Zoldyck to join us. I'm Uraraka Ochako, by the way!"

"Nice meeting you, Uraraka!"

Killua glanced at Aizawa's face, and he almost straight up laughed at the sight of how annoyed he was. If hanging out with these students would get more of that reaction out of him, then, by all means, he'd go for it.

This is what you get for not letting me go, he impishly thought. All of this could've been avoided if that rat principal didn't call him a threat; now, Aizawa had to pay for it, too.

"Are you feeling okay, Zoldyck? After Iida helped carry you to Recovery Girl, we were all so worried," Uraraka said, pouting while recalling the scene.

"I'm all good," he smiled, "I could go for some lunch with you guys, though!"

"R-really?" Midoriya said, looking like he just got told he won ten million jenny.

"Yup! As long as Homeless-sensei's okay with it?"

"Homeless-sensei?!" Iida hollered in disbelief.

Aizawa looked to be on the edge of breaking, eye twitches abundant.

"That's enough," he scolded, effectively silencing the group of teenagers. "I'm supposed to be watching Zoldyck. I am not going to let him drag me into eating along with you students, the same way Nezu dragged me into watching him in the first place."

Killua sulked as he was forcefully led away from his group of potential means for annoying the hell out of Aizawa. But if he was their teacher, it wouldn't be unrealistic in expecting to see them again.

His focus instead shifted on the students as a whole while he was led to the lunch line. It was an odd sight. There were people who looked "normal," but there were others who looked like...

Ants?

Wait, no, that didn't make sense.

He first saw it with Nezu, and he also was the one to explain to him what quirks were, including so-called "mutant" quirks. And, apparently, they can manifest in very, very unique ways; one student had horns, one had a bird head, and another had a... manga speech bubble head.

On the walk back to the staff room where Aizawa would be free from "noisy students" (seriously, why is he a highschool teacher if he acts like he hates teenagers?) after getting food from Lunch Rush, Killua wondered what his own quirk was. Though earlier, he caught a glimpse at himself through a mirror, so he ruled out having a mutant quirk.

"Here," Aizawa said as he pointed to a nearby couch, "sit."

"I'm not a dog."

"Then eat standing up, I don't care." The teacher walked over to his desk, pulling out its chair and taking a seat while Killua grumbled in place.

Stupid homeless guy, he thought. Instead of following Aizawa's order, he chose to invade his personal space by hovering right over his shoulder, looking at the documents laid out on his desk. Eyes quickly scanning the pages, he learned two things: a student named Kaminari Denki had a D in one of his classes, and something about a USJ attack...

"Do you mind?" Aizawa covered the papers with other, less important ones.

Killua gave him a lazy look and said, "I'm bored. Also, I'm not hungry yet."

"What do you want?"

Scratching his chin, he recalled the now covered up information on the desk. "What's USJ? Something to do with that scary League of Villains you talked about?"

"None of your business."

What a killjoy.

Before Killua turned around to mope back over to the couch, Aizawa said, "How'd you remember your name?"

Surprised by the sudden curiosity, Killua shrugged and answered, "Some guy reminded me of it."

"Midoriya?"

"Yeah, dark green hair," he chuckled. "He's way too plain, though! He's nothing like what I was looking for."

Aizawa raised an eyebrow. "And what were you looking for?"

"Stupid, I'm an amnesiac. I wouldn't know."

"You don't remember manners, either."

"Huh? Why should I care?"

Frustration once again seemed to build up in the tired teacher's attitude. Shutting his eyes, he pinched the bridge of his nose and said, "We're supposed to be around each other for who knows how long. Can't you make this a little easier for the both of us?"

Killua threw up his hands in mock defeat, muttering a simple, "Whatever," and turned to the couch to eat his food. And, since Aizawa took it upon himself to do his job, he was left to his own thoughts, slowly but surely finishing an actually quite delicious bento.

He was an amnesiac. He was sure of that. But since he was able to remember his name, that meant not everything was lost... how would he go about trying to bring back the rest of his memories? Maybe he could talk to that Midoriya boy some more; see if there's anything worth digging up from that split second of recognition that gave him just one piece to the puzzle. It was a long shot, but it was still a shot. Taking it would be the next best move, if Aizawa wasn't so strung up on being such a weird antisocial loner (who also looks homeless.)

But no matter how much he wanted to mess with him, he couldn't ignore the fact it was Aizawa who faced him with a question he ended up asking himself, as well.

What was he looking for?

Gon Freecss woke up on a tattered couch in what looked like a bar. There stood some smoke... no, a smoky purple man wearing a suit somehow, cleaning wine bottles behind the bar. A man with light blue hair sat at it.

"Who are you?" Gon aimlessly spoke out loud, shooting up from the couch and skipping over to the two.

Both men instantly whipped their heads to Gon, him realizing the man who was sitting down had his entire upper body covered in hands, including part of his face. Whether they were real or not wasn't a concern, he just wanted answers.

"I'm Shigaraki Tomura," the hand-ful man deadpanned. "Who are you?"

Gon smiled and held out a hand. "I'm Gon Freecss!"

A dry laugh escaped his lips. "You sure you want to do that?"

"Huh?" Gon tilted his head to the side, hand still outstretched.

"Shigaraki," the smoky man said, almost as if he were scolding.

It was just one word, but something in Shigaraki's demeanor changed from interest to annoyance upon hearing it.

"Yeah, yeah, whatever," he waved off, reaching to shake Gon's hand. The odd thing about it was that his pinky was lifted, but he assumed it was just some funny little quirk he had. And although his appearance was quite menacing, he hadn't done anything to actually be granted that title.

"I'm Kurogiri," the smoke-man behind the counter said. "Do you know why you're here?"

"Hm, not really. I can't remember anything," Gon answered. A beat passed, and he made a small sound of realization, raising a finger in the air. "Ah, I was with Aunt Mito!"

"Aunt Mito?"

"Yeah, she's awesome! But... if I'm here, that means I probably ran off again." He rubbed the back of his head, giving them a sheepish smile. "It's okay though, it's been years since I've been on an adventure!"

The two men passed glances at each other, silently communicating something he couldn't decipher.

Kurogiri again took the lead in questioning him. "What was your last adventure?"

"Oh, I finally met Ging Freecss! I climbed a World Tree to get to him, and... and..."

A moment passed, and his face looked almost as if he was straining something, cheeks puffed as smoke threatened to blow out his ears. He finally relaxed, but the effort spent was, in the end, worthless.

"I don't remember. All I can think of is Aunt Mito and Ging, but there's things I feel like I'm missing..."

"It doesn't matter," Shigaraki said. "Aren't you supposed to be strong? You're just a kid. What's your quirk?"

"I'm 14!" he corrected, then an instant look of confusion followed. "Quirk?"

"Your power, abilities, whatever you call it, I don't care."

"Oh! I can use Nen," Gon said, then realization settled. "...I could use Nen."

"Eh? So you're useless?"

"No! I'm still strong."

Annoyance glazed over his face. "Then prove it. I'm not going to keep someone who can't do anything on our side." He stood up from his spot on the couch and stood a few feet away from Gon, as if challenging him. Kurogiri, even if he did only have two yellow slits for eyes as his sole facial features, sent him a cautious look.

Gon could have questioned what he meant by him being on their side, especially after waking up in such an odd situation. But once he realized his opportunity to fight, he couldn't help but have it be the only thing on his mind.

"I'm going to kill you. You win if you survive."

"Shigaraki, don't underestimate him."

"Shut up."

Gon beamed, fire lighting in his eyes. "Okay!"

He shot forward, straight for Shigaraki, and made his move.

This was the first time he'd be fighting someone since he went back home, and he really really hoped hands-guy was strong enough for him to put all his training to use.

His hopes were unfortunately crushed when his challenger immediately slammed against the brick wall, leaving behind a deep crater from the sheer force of impact.

All from a single push.

Coughing as he was slumped on the wall, he all of a sudden began laughing.

"Freecss..."

"No, call me Gon."

Another dry laugh from his defeated opponent. His head rose to make eye contact with him, grinning behind the hand covering his face as he slightly jolted from every shock of pain. Blood trickled down his forehead, but he still managed to rise from his spot on the ground.

"You'll be a fun toy to play with, Gon," he cackled.

A/N: thanks for reading until the end, i hope you enjoyed it! i'm trying hard to keep everyone in character in the story, so i hope nothing seems too off. i honestly started writing this because there aren't too many hunter x hunter and my hero academia crossovers (or i've already read them all haha...) so i wanted to try my hand at combining two of my favorite animes. please feel free to leave some feedback (especially reviews!) it really motivates me to know people are reading. thank you, and see you in the next chapter :)