The early morning sunlight filtered through crimson curtains, casting a warm glow across the Beacon Academy dorm room. A figure stirred in the top bunk, blonde hair splayed across a white pillow. Consciousness came slowly, then all at once as unfamiliar sensations registered.

"Mmph... my arms feel heavy..." The voice that emerged was feminine, causing green eyes to snap open in confusion. The ceiling seemed closer than usual, and the bed felt wrong – wider, softer, with different sheets.

Sitting up abruptly, long blonde hair cascaded forward. Izuku stared at the golden strands in bewilderment, heart beginning to race. These weren't his hands – they were larger, more calloused, with yellow bracelet-like devices around the wrists. The room itself was entirely foreign: bunk beds arranged haphazardly, some suspended by ropes, posters of weapons and bands on the walls.

"What... what's going on?" Izuku whispered, the unfamiliar voice causing another jolt of panic. Looking down revealed an orange tank top and black shorts – definitely not his All Might pajamas. The body was taller, stronger, and unmistakably female.

A soft groan from the bottom bunk drew attention. A girl with black hair and a bow was beginning to stir. "Yang? You're up early..."

Izuku froze, mind racing. Yang? Was that whose body this was? "I... uh..." he stammered, trying to modulate the strange voice. "Just... couldn't sleep!"

The dark-haired girl raised an eyebrow but didn't comment further, reaching for a book on the nightstand. Izuku's gaze darted around the room, taking in more details – weapon racks, school uniforms he didn't recognize, and three other beds occupied by sleeping figures.

'This isn't my room. This isn't my body. This isn't even my world,' the thought finally crystallized. 'But how? Why? And where is my body?'

Scene 2: Yang in Izuku's Body

Sunlight streamed through All Might curtains into a modest bedroom filled with hero merchandise. On a twin bed, a figure with green hair twitched in their sleep, one arm thrown across several All Might plushies.

Yang gradually drifted toward consciousness, immediately sensing something was off. The bed felt smaller, harder, and the air smelled different – less like weapon oil and dust, more like... curry?

"Izuku! You'll be late for UA!"

The unfamiliar voice jolted Yang fully awake. She sat up, immediately noticing everything was wrong. The room was tiny compared to Beacon's dorms, plastered with posters of a muscular man in red, white and blue. But more concerning was the body – smaller, male, wearing All Might pajamas.

"What the hell?" Yang muttered, then clapped a hand over her mouth at the boyish voice that emerged. She looked down at pale, scarred hands, flexing them experimentally. The arms had definition but nothing like her usual toned muscles.

"Izuku?" The voice called again, closer now.

"Uh, coming!" Yang responded automatically, mind whirling. UA? Izuku? None of this made sense. She stood, stumbling slightly at the different center of gravity. A mirror on the wall revealed a freckled face with wide green eyes and messy green hair.

'This has to be a dream,' Yang thought, pinching one arm. The pain felt real enough. A hero costume hung on the wall – green with white highlights and a mask. School uniforms were neatly pressed nearby.

"Your breakfast is getting cold!"

"Just... just a minute!" Yang called back, anxiety building. She was in a strange body, in a strange place, and apparently had to go to some school called UA. And who was this Izuku person everyone thought she was?

The door opened, revealing a round-faced woman with green hair. "Are you feeling alright, sweetie? You're usually up by now..."

Yang forced a smile, trying to act natural despite the surreal situation. "I'm fine! Just... tired from training yesterday!"

The woman – apparently this body's mother – nodded sympathetically. "Well, hurry up and get dressed. You don't want to keep young Iida waiting!"

As the door closed, Yang slumped against the wall. 'Ruby is never going to believe this... if I ever get back to tell her.'

The morning sun continued to filter through the crimson curtains as Izuku sat cross-legged on Yang's bed, golden hair cascading over his shoulders as he examined the yellow bracelets on his wrists. Below, Blake had settled into reading her book while Ruby and Weiss were beginning to stir.

'These devices seem to be some kind of weapon,' Izuku muttered, falling into his familiar analysis mode despite the feminine voice that emerged. "The mechanism appears to be spring-loaded, possibly triggered by a specific motion or impact. The craftsmanship is incredible, and the weight distribution suggests they can be used for both offense and defense without compromising mobility..."

Ruby's silver eyes blinked open at the sound of muttering from above. She sat up, red-tipped hair disheveled, and stared at her sister's form with confusion. "Yang? Are you... analyzing your own Ember Celica?"

"Ember Celica?" Izuku latched onto the name, continuing his muttering investigation. "So that's what they're called. The name suggests fire or explosive capabilities. Perhaps the chambers here are for some kind of ammunition? But the loading mechanism isn't like any gun I've seen. And the recoil management system is fascinating..."

Weiss stirred in her precariously suspended bed, ice-blue eyes narrowing at the unusual morning monologue. "What in Remnant has gotten into you? You've had those gauntlets for years."

"The transformation sequence is particularly elegant," Izuku continued, too absorbed in his analysis to notice the growing confusion around him. "The way it expands from bracelet form suggests inspiration from traditional boxing techniques while incorporating modern weapons technology. The user could theoretically enhance their punching power while maintaining the option for ranged attacks..."

Blake lowered her book, amber eyes studying the muttering blonde with growing concern. Her bow twitched slightly as she exchanged glances with her teammates.

Ruby hopped out of bed, rose petals briefly trailing in her wake as she moved closer to examine her sister. "Yang, you're starting to sound like me when I see a new weapon! Are you feeling okay?"

Izuku finally registered the attention he was drawing, heat rising to his cheeks as he realized he'd fallen into his old habits. "Oh! I'm sorry, I just... find the engineering really interesting?" He tried to modulate his voice to sound more like he imagined this 'Yang' would speak.

"Engineering interesting?" Weiss scoffed, climbing down from her bed with perfect poise despite its questionable construction. "You usually just punch things until they explode."

The comment made Izuku's eyes widen. 'Explosions? Like Kacchan?' He looked back at the gauntlets with renewed interest, unconsciously beginning to mutter again. "The explosive force could be channeled through the punching motion, creating a synergistic effect between the user's natural strength and the weapon's output. The recoil could even be used for mobility enhancement, similar to how some pro heroes use their quirks for movement..."

"Okay, now you're really freaking me out," Ruby declared, pressing a hand to Yang's forehead. "No fever... Did you hit your head during training yesterday?"

"What's a pro hero?" Blake asked quietly, marking her place in her book.

Izuku froze, realizing his slip. "Ah, I meant... huntsmen? Yes, huntsmen!" He desperately tried to recall the unfamiliar terms he'd heard them use. "And... huntresses?"

The three girls exchanged worried looks. Weiss stood, hands on her hips as she regarded their teammate critically. "Perhaps we should take her to the infirmary."

"No!" Izuku waved his hands frantically, still startling slightly at how different they felt. "I'm fine, really! Just... had some weird dreams that have me thinking differently this morning!"

His gaze fell on a weapon propped against Ruby's bed – a massive red and black contraption that appeared to be both a scythe and a gun. The analytical muttering started again before he could stop himself. "The transformation mechanics must be incredibly complex to allow for both forms while maintaining structural integrity. The blade angle suggests optimization for sweeping attacks while the rifle component appears to be high-caliber, possibly using the recoil for additional momentum in close combat..."

Ruby's face lit up. "You want to know about Crescent Rose? I can tell you all about her! I used a high-carbon steel alloy for the blade, and the firing mechanism is custom-designed to handle specialized dust rounds..."

"Ruby!" Weiss interrupted. "Something is clearly wrong with Yang. She's never shown this much interest in weapon specifications before."

Izuku tried to school his features into something more casual, though his eyes kept darting around the room analyzing everything. The beds' construction, the various weapons, the strange crystals on Weiss's desk that seemed to glow with different colors – it was all fascinating from an analytical perspective.

"Maybe we should call Professor Goodwitch," Blake suggested, marking her place in her book again.

"Really, I'm okay!" Izuku insisted, trying to climb down from the top bunk without making it obvious he wasn't used to this body's proportions. He nearly stumbled but caught himself on the edge of Ruby's bed. "I just need to... get ready for class!"

His hand brushed against Crescent Rose, and before he could stop himself: "The balance point suggests it can be used as a pole arm in its extended form, and the curve of the blade would create optimal cutting angles when using the recoil for spinning attacks. The compacted form appears to maintain full rifle functionality while improving portability..."

"Okay, that's it!" Weiss declared. "The Yang I know doesn't use words like 'optimal cutting angles' or 'structural integrity.' Something is definitely wrong."

Ruby nodded emphatically. "Yeah, usually you just say things like 'It's also a gun!' or make terrible puns!"

Izuku's mind raced, trying to think of a pun to dispel their suspicion. "Well, I guess you could say this morning has been... quite... disarming?" He gestured weakly at Ember Celica.

The silence that followed was deafening.

"That," Blake said slowly, "was the worst pun you've ever made. And that's saying something."

"Professor Goodwitch," all three girls said in unison, reaching for their scrolls.

Izuku panicked, finally spotting what appeared to be a bathroom door. "I'll just go get ready!" He darted inside, closing the door perhaps a bit too quickly. Leaning against it, he slid down to sit on the floor, head in his hands.

'This is bad. They know something's wrong. But I can't help analyzing everything – it's all so different from quirks! These weapons are incredible pieces of engineering, and they all seem to have multiple forms. Plus, there's no mention of quirks at all. Where am I? What happened to my body? And who is this Yang person I'm supposed to be?'

A knock on the door made him jump. "Yang?" Ruby's voice came through, heavy with concern. "We're really worried about you. Please let us help?"

Izuku stared at his reflection in the bathroom mirror – long blonde hair, lilac eyes, a face that belonged to someone else entirely. He needed to figure out what was going on, but first, he needed to find a way to act more like this Yang person before they really did call for help.

'At least I didn't start taking notes,' he thought, imagining how they'd react to seeing their seemingly weapon-obsessed teammate suddenly pulling out a notebook to document everything. Then he spotted Yang's scroll on the bathroom counter and had to physically stop himself from reaching for it to start documenting his observations.

Another knock, more insistent this time. "Yang Xiao Long, open this door right now!" Weiss demanded.

'Even her name is fascinating,' Izuku's mind wandered. 'The pronunciation suggests...'

"And stop muttering in there!"

Izuku clapped a hand over his mouth, realizing he'd been doing it again. He needed to get control of this situation fast, but everything was just so interesting from an analytical perspective. The weapons, the technology, the strange crystals they called 'dust' – it was like being dropped into an entirely different system of powers and abilities that begged to be understood.

Through the door, he could hear the girls having a heated discussion:

"I'm calling Professor Goodwitch." "Wait, maybe we should try Professor Ozpin instead?" "What if it's some kind of semblance effect?" "Yang's semblance is fire and strength, not... whatever this is!" "Could it be some kind of dust accident?" "Since when does Yang handle dust? She punches things!"

'Semblance? Dust? Professors?' Izuku's analytical mind latched onto each new term, starting yet another round of muttering. "The reference to semblance suggests some kind of innate ability system, possibly similar to quirks but with different underlying principles. And dust seems to be an energy source or catalyst, but the various colors might indicate different elemental properties..."

"There she goes again!" Ruby's voice came through the door, equal parts worried and fascinated. "I've never heard Yang talk like this!"

Izuku forced himself to take deep breaths. He needed information, but his usual information-gathering method was clearly too suspicious. He'd have to find another way to learn about this world without breaking character. But first, he needed to figure out how to act like Yang.

He studied his reflection again, trying to project confidence instead of analytical curiosity. "Just act natural," he told his reflection, then winced at how unnatural it sounded. "I mean... it'll be fine! Everything's... uh... on fire?" He tried to make a pun about fire given what he'd heard about Yang's semblance, but it fell flat even to his own ears.

The heated discussion outside continued, and he could hear someone on a scroll talking to what sounded like authority figures. Time was running out.

'I'm sorry, All Might,' he thought, 'but I don't think "I AM HERE" is going to help me this time...'