Mirror, Mirror on the Wall

The morning light slipped through the thin curtains, painting pale stripes across the futon where Atsumu lay sprawled, one arm draped over his face. Something was off. He could feel it in the way his hair brushed against his cheeks—longer, softer, tickling his nose. He scrunched up his face and rolled onto his side, groggy, and noticed a strange weight on his chest. Unfamiliar. Heavy.

He blinked his eyes open, still half-lost in a dream he couldn't remember. The room looked the same. Posters of volleyball players on the walls. His training bag slumped in the corner. Osamu’s loud snoring from the other futon. Everything normal—except for that weight. He sat up, rubbing his eyes, and looked down.

His shirt—his oversized sleep shirt—hung differently now. Looser around the shoulders, but pulling tight across a pair of distinct, soft curves he’d never seen on his own body before. He froze. His hands trembled as he brought them up to his chest. He touched the mounds of flesh—soft, real—and a sharp, electric jolt shot through him. He yanked his hands back like he’d been burned.

“What the hell,” he whispered, and the sound that came out made his blood run cold. Not his voice. Higher, softer, feminine. He scrambled off the futon, barely registering the strange, unfamiliar rhythm of his body as he moved—hips swaying, a different center of gravity—and stumbled into the small bathroom they shared. He flipped on the light and stared into the mirror.

A girl stared back.

Long, honey-blonde hair cascaded past her shoulders, the ends slightly tangled from sleep. Her face was softer than his—cheekbones less sharp, jawline more delicate—but the eyes were unmistakable. Honey-brown, wide with panic, slanted in that distinctive Miya way. She lifted a hand, and the reflection did the same, touching the cheek, tracing down to the neck, the collarbone. No Adam’s apple. Atsumu opened his mouth to scream, but no sound came out.

“Osamu,” he croaked instead, his new voice thin and desperate. “Osamu! Get up!”

Thudding footsteps from the bedroom, then the bathroom door flew open. Osamu stood there, sleep-tousled and annoyed, his words dying in his throat the moment he laid eyes on the person in the bathroom. His face went through a rapid sequence—confusion, shock, disbelief, fear—before settling on pure alarm.

“Who the hell are you?!” he shouted, stepping back, hands flying up in a defensive posture. “What are you doing in our house? Where’s Atsumu?!”

“I am Atsumu, you moron!” Atsumu shrieked back, his voice cracking on the last word. He grabbed the collar of his shirt and tugged it down, exposing the small, familiar scar on his collarbone—the one he’d gotten when they were seven, falling out of the same tree. “Look! Look at this!”

Osamu squinted, leaning forward cautiously. His eyes traced the scar, then traveled up to meet those panicked, familiar eyes. The same annoyance. The same frantic energy. The same way of biting his lower lip when he was scared.

“Atsumu?” Osamu breathed, his voice dropping to a whisper.

“Yes, obviously!” Atsumu crossed his arms over his chest, then immediately uncrossed them as the pressure sent another wave of alien sensation through him. “I don’t know what happened! I just woke up like this!”

Osamu stared at him for a long, heavy moment. Then he did the only thing that made sense in the face of such absurdity: he started laughing. Not a chuckle, not a snort, but full, wheezing laughter that bent him over and had him bracing his hands on his knees.

“It’s not funny!” Atsumu shrieked, grabbing a towel and hurling it at his brother’s head. “Osamu! Osamu, stop!”

“I’m sorry,” Osamu gasped between laughs, straightening up with tears in his eyes. “I’m sorry, it’s just—you look like Mom. You look exactly like Mom when she was younger.”

Atsumu’s anger deflated, replaced by something colder. He turned back to the mirror, studying his reflection with new eyes. Osamu was right. The same soft jawline, the same honey-brown eyes, the same thick hair. He looked like their mother at sixteen, just with slightly sharper features and a more brash expression.

“What am I supposed to do?” Atsumu asked quietly, and the vulnerability in his voice made Osamu’s laughter die immediately.

“Let’s figure it out,” Osamu said, stepping closer and putting a hand on his twin’s shoulder. The height difference was wrong. He had to look down now to meet Atsumu’s eyes, instead of the other way around. Atsumu had been two centimeters taller. Now he was a good five centimeters shorter. “First things first. You need to shower. You look like you’ve been rolling on the floor.”

“I haven’t. I just—” Atsumu gestured vaguely at himself. “It’s weird. Everything’s weird.”

“I’ll find you some clothes,” Osamu said, already backing out of the bathroom. “Just… shower. It’ll help.”

Atsumu locked the door after Osamu left, turning back to the mirror. He forced himself to look properly this time. His body was slender but not bony, with curves that were distinctly feminine. His breasts drew his gaze—substantial, probably a D cup, he guessed, though he had no frame of reference. He groaned and stepped into the shower, turning the water to scalding.

The shower was a nightmare of new sensations. Water sluiced over his skin in ways it never had, each rivulet leaving trails of sensitivity that made him shiver. Washing his hair took forever—there was so much more of it now, and it tangled easily. He fumbled with the shampoo, nearly dropping it twice. When he finally worked up the courage to wash his body, his hands trembled, fingers brushing against places that felt familiar and alien all at once.

No male anatomy. Just smooth skin and an unfamiliar emptiness that made his stomach churn. He washed quickly after that, avoiding looking down, avoiding thinking about what he’d lost. Every touch, every splash of water, every brush of his hand against his skin sent sparks of hypersensitivity through him. By the time he stepped out, wrapped in a towel that didn’t quite seem to cover enough, his skin was pink and buzzing with overstimulation.

He padded back to the bedroom, where Osamu had laid out a change of clothes on his futon. His school uniform. The white shirt looked impossibly small, the pleated skirt lying beside it like an accusation.

“What’s this?” Atsumu asked, pointing at the skirt.

“Your uniform,” Osamu said flatly, not looking up from his phone. “I checked your closet. You don’t have anything else. Apparently, when you transformed, your wardrobe transformed too.”

“I’m not wearing a skirt.”

“Then go to school naked.”

Atsumu snatched the clothes off the futon and retreated to the bathroom. The uniform was a female version of Inarizaki’s standard outfit—white button-up shirt, blue pleated skirt, red ribbon tie. He put on the shirt first, fumbling with the buttons, and discovered his first major problem: his breasts.

The shirt pulled tight across his chest, fabric straining. When he moved, they moved. They jiggled. It was the strangest, most distracting sensation he’d ever experienced. The nipples—pink and much more sensitive than his old ones—pressed visibly against the thin fabric, making him cringe. He tried the skirt next, hating the way it swished around his thighs, the way his legs felt exposed.

He looked at himself in the mirror. A girl in an Inarizaki uniform stared back. He barely recognized himself. The only familiar thing was the scowl. He tied his hair back with a rubber band he found on the sink counter, the ponytail swishing against his neck in a way that made him want to cut it all off right then and there.

When he walked back into the kitchen, Osamu was making breakfast. Rice, miso soup, grilled fish. The smell was comforting, grounding. Atsumu sat down heavily at the table, wincing as his breasts bounced with the movement. He pressed his arms against them self-consciously, trying to keep them still.

Osamu glanced at him, then did a double-take. His gaze traveled slowly, taking in the white shirt, the ribbon tie, the blue skirt, the ponytail. His expression was unreadable.

“What?” Atsumu snapped.

“Nothin’,” Osamu said, turning back to the stove. “You just… look smaller than I remember.”

“I’m not smaller. I’m probably the same height.”

“You’re definitely shorter. Come here.”

Atsumu stood reluctantly, walking over to where Osamu stood. They turned to face each other. Osamu’s eyes were level with Atsumu’s forehead. He used to have to tilt his chin up to meet Atsumu’s gaze. Now Atsumu had to look up.

“See?” Osamu said softly. “You’re shorter. And thinner. I can probably lift you with one arm now.”

“Don’t you dare.”

Osamu reached out and poked Atsumu’s shoulder. “You’re soft too. Like, actually soft. Your skin’s different.”

Atsumu slapped his hand away. “Stop touching me!”

“Just observing.” Osamu returned to the stove, ladling miso soup into bowls. “You know, we’re gonna have to figure out the bra situation.”

Atsumu choked. “What?”

“You need a bra. For school. For volleyball. For everything.” Osamu set the bowls on the table and sat down across from him. “You can’t run around like that. It’s gonna hurt, and it’s gonna be obvious.”

“I’m not wearing a bra,” Atsumu hissed, his face burning. “I’ll figure somethin’ out.”

“There’s nothin’ to figure out. You need a bra. We can go buy one after school.”

“I am not goin’ bra shoppin’ with you, Osamu!”

“Fine, go by yourself.” Osamu picked up his chopsticks and started eating. “But you’re gonna have a rough day if you don’t.”

Atsumu stared at his food, his appetite gone. His chest throbbed with every heartbeat, the fabric of his shirt rubbing against his sensitive nipples. He tried to ignore it, picking up his chopsticks and forcing himself to eat. The food tasted like ash in his mouth.

Breakfast passed in silence. Osamu watched him with those quiet, observant eyes, and Atsumu felt stripped bare. Not just physically, though that was bad enough. His twin could see right through him, could see the fear and confusion he was trying so hard to hide.

“We’ll get through this,” Osamu said finally, standing up to wash the dishes. “It’s just a body. You’re still you.”

“But I’m not,” Atsumu whispered, his voice cracking. “I’m not me anymore.”

“Yes, you are.” Osamu turned, drying his hands on a towel, and looked at his twin with an expression that was almost soft. “You’re still annoyin’, still loud, still obsessed with volleyball, still got that stupid crush on Kita-san that you won’t admit to. You’re still Atsumu. You just look different.”

Atsumu’s eyes stung. He blinked rapidly, refusing to cry. “You’re bein’ weirdly nice.”

“Don’t get used to it.”

The walk to school was agonizing. Every step sent vibrations through Atsumu’s body, making his breasts bounce and jiggle inside his shirt. He couldn’t find a comfortable way to walk. His hips swayed in a way they never had, his center of gravity shifted lower, and his new body seemed determined to betray him at every turn. He kept his arms crossed over his chest, trying to keep everything still, but that just drew more attention.

Guys stared at him as they passed. Girls too, but in a different way—curious, assessing. He heard whispers follow him like a trail, words he couldn’t quite catch but knew were about him.

“Just ignore them,” Osamu said, walking close beside him, a solid, reassuring presence.

“Easy for you to say,” Atsumu muttered. “You’re not the one who woke up with boobs.”

Osamu snorted, covering his mouth with his hand. “You gotta stop talkin’ like that. People are gonna think you’re weird.”

“I am weird! I’m a guy trapped in a girl’s body! That’s pretty weird!”

“Keep your voice down!”

They reached the gymnasium where the boys’ volleyball team was having morning practice. Atsumu hesitated at the door, his hand hovering over the handle. Could he even go in there? Was he still on the team? He was still a guy, technically, but no one would know that. They would see a girl in a skirt and wonder what she was doing there.

“Come on,” Osamu said, pushing the door open. “You’re still a member of this team. Don’t let ’em scare you off.”

The gym was already buzzing with activity. First-years were setting up nets, second-years were warming up, and the third-years were huddled together, discussing drills. Suna Rintarou was the first to notice them, his lazy gaze sliding over Osamu, then freezing on Atsumu.

“Who’s the girl?” Suna asked, his voice carrying across the gym.

The other players turned. Atsumu felt seventeen pairs of eyes land on him, and he wanted to sink into the floor. He recognized the look on their faces. Confusion. Curiosity. A few of them were checking him out, and the realization made his stomach turn.

“She’s, uh, Atsumu’s cousin,” Osamu said quickly, stepping in front of his twin. “He’s not feelin’ well today. She’s just droppin’ somethin’ off.”

Atsumu nodded, not trusting his voice. He could feel Suna’s gaze boring into him, sharp and analytical. Suna was too smart. He would figure it out. He always did.

“His cousin,” Suna repeated flatly. “She looks exactly like him.”

“Genetics,” Osamu said, his voice strained. “Anyway, she’s leavin’ now.”

Osamu grabbed Atsumu’s arm and dragged him out of the gym, not stopping until they were around the corner, hidden from view. Atsumu sagged against the wall, his heart pounding.

“That was terrible,” he breathed.

“He’s gonna figure it out,” Osamu said, running a hand through his hair. “Suna’s too observant. But we can worry about that later. Right now, you need to survive until lunch.”

Classes were a new kind of torture. Atsumu sat in his usual seat, but he felt like an imposter. His classmates looked at him strangely, some with recognition, some with confusion. Teachers called on him, and he had to speak in his new voice, which made half the class turn around in surprise. He hunched over his desk, arms pressed against his chest, trying to minimize the movement, but the constant pressure was making his breasts ache.

Between classes, he ducked into the bathroom and locked himself in a stall. He splashed cold water on his face, staring at his reflection in the small, grimy mirror. Same eyes. Same Miya features. But everything else was wrong.

At lunch, he couldn’t face the cafeteria. The thought of walking through those doors, of being seen by everyone, of having to explain himself—he couldn’t do it. Instead, he made his way to the club room, the small room where the volleyball team stored their equipment and changed. It would be empty at this hour. He could hide.

But the moment he walked in, the silence of the room pressed down on him, and he felt the tears building. He sank onto one of the benches, burying his face in his hands, and let himself fall apart. The sobs came in ugly, gasping waves, his new body shaking with the force of them. His breasts jiggled with every heave of his chest, a constant, mocking reminder that nothing was right.

He was still crying when the door opened.

“Atsumu?”

Osamu’s voice. Gentle. Concerned. Atsumu looked up through blurry eyes, seeing his twin standing in the doorway, holding a bento box.

“Figured you’d be here,” Osamu said softly, closing the door behind him. He walked over and sat down beside Atsumu, close enough that their shoulders almost touched. “Brought you food. You didn’t eat breakfast.”

“I’m not hungry.”

“Tough. You need to eat.”

Osamu opened the bento box and set it in Atsumu’s lap. Rice, tamagoyaki, grilled mackerel, pickled vegetables. Atsumu stared at it, his stomach turning, but he picked up the chopsticks anyway and forced himself to eat a bite. The food was warm and familiar, and something in his chest loosened.

“I hate this,” Atsumu whispered between mouthfuls. “I hate everythin’ about this.”

“I know.”

“My boobs hurt. My voice is weird. Everyone stares. I can’t even walk right without—without—” He broke off, fresh tears spilling down his cheeks.

Osamu didn’t say anything. He just shifted closer and wrapped an arm around Atsumu’s shoulders, pulling him into a side hug. Atsumu stiffened for a moment, then collapsed against his brother, burying his face in Osamu’s shoulder. They stayed like that, the bento box forgotten in Atsumu’s lap.

“You’re still my annoyin’ twin,” Osamu said quietly, his voice rough. “Even as a girl. You’re still the same idiot who steals my food and wakes me up at six in the mornin’ to practice serves. That doesn’t change. Not because of some stupid body swap.”

Atsumu laughed wetly, the sound muffled against Osamu’s uniform. “You’re gonna get all sappy on me.”

“Shut up. I’m tryin’ to be nice.”

“I know. Thanks.”

They sat in comfortable silence, the tension slowly draining from Atsumu’s shoulders. He had almost forgotten about the outside world when a knock on the door made them both jump.

“Miya? Are you in there?”

Kita Shinsuke’s voice. Calm, steady, polite. Atsumu’s heart slammed against his ribs. He pulled away from Osamu, frantically wiping his eyes.

“Shit,” he hissed. “Shit, shit, shit—”

“Calm down,” Osamu said, but his own voice was tight with nerves.

The door opened, and Kita stepped in. His eyes landed on Atsumu first—the girl in the female uniform, with tear-tracked cheeks and a deer-caught-in-headlights expression—and something flickered in his gaze. Recognition. Understanding.

“Kita-san,” Osamu started, standing up. “This isn’t—”

“I noticed something was wrong this morning,” Kita said calmly, cutting him off. He walked into the room, closing the door behind him, and sat down on the bench across from Atsumu. His posture was relaxed, his hands resting on his knees. “You were avoiding me. You never avoid me.”

Atsumu’s throat closed up. He couldn’t speak, couldn’t breathe. Kita was looking at him with those steady, warm eyes, and he felt completely exposed.

“I don’t know what happened,” Kita continued, his voice gentle. “And I don’t need to know. But I wanted you to know that whatever it is, it doesn’t matter to me. You’re still the same person you were yesterday. You’re still a member of this team. You’re still… you.”

“I’m not,” Atsumu choked out. “I’m not the same. Look at me. I’m a girl. I’m—”

“You’re Atsumu Miya,” Kita said firmly, and the certainty in his voice made Atsumu’s protest die on his lips. “You’re the setter for Inarizaki’s volleyball team. You’re loud and arrogant and annoyin’ sometimes, but you’re also hardworkin’ and dedicated and you care more about this team than you let on. That hasn’t changed.”

Atsumu stared at him, his vision blurring with fresh tears. No one had ever said anything like that to him before. No one had ever seen him that clearly.

“I’m scared,” he admitted, his voice barely a whisper.

“I know,” Kita said, and there was a softness in his eyes that made Atsumu’s chest ache. “But you don’t have to be alone. You have Osamu. You have the team. And…” He paused, his ears turning slightly pink. “You have me. If you want.”

Osamu cleared his throat loudly, breaking the moment. “Alright, that’s enough. We’ve got practice in an hour, and Atsumu needs to finish eatin’.”

Kita stood, nodding. “I’ll leave you to it. But Atsumu…” He paused at the door, looking back over his shoulder. “If you ever need to talk, I’m here.”

The door clicked shut behind him, leaving Atsumu and Osamu in stunned silence.

“He knows,” Atsumu said numbly. “He figured it out.”

“Kita-san’s always been perceptive,” Osamu said, sitting back down. “And he’s a good guy. You could do worse.”

“I know.” Atsumu looked down at the bento box in his lap, a small, fragile smile tugging at his lips. “I know.”

The walk home was quiet, but not uncomfortable. The sun was setting, painting the streets in shades of gold and orange. Atsumu walked with his arms still crossed over his chest, but the motion was less defensive now, more habitual. He was learning to accept the new weight, the new sensations.

“So,” Osamu said, breaking the silence. “Five months.”

“Five months,” Atsumu echoed. The transformation had come with a mental memo, of all things—a strange, lingering knowledge that this would last until the spring. Five months of being a girl. Five months of skirts and bras and jiggly chests and high-pitched voices.

“I’m scared,” Atsumu admitted.

“I know.”

“What if I can’t play volleyball like this? What if my jump serve is different? What if everyone treats me different?”

“Then we adapt,” Osamu said simply. “We figure it out. Together.”

Atsumu looked at his twin, really looked at him. Osamu’s face was serious, his jaw set, his shoulders squared. He meant it. Every word.

“You’re really gonna help me?” Atsumu asked, his voice small.

“I said I would, didn’t I?” Osamu rolled his eyes. “Besides, someone’s gotta make sure you don’t embarrass yourself in a bra shoppin’ aisle.”

“I’m still not goin’ bra shoppin’ with you!”

“Fine. I’ll send Kita-san with you instead.”

“Osamu!”

They bickered all the way home, their voices carrying through the quiet streets, a familiar rhythm that felt almost normal. And when they reached their front door, Atsumu paused, looking up at the house he’d lived in his entire life. The same house. The same home. The same twin standing beside him.

“Hey, Osamu?”

“Yeah?”

“Thanks. For today. For… everythin’.”

Osamu shrugged, but there was a warmth in his eyes that he couldn’t quite hide. “Don’t mention it. Seriously. Don’t mention it. I have a reputation to maintain.”

Atsumu laughed, the sound surprising him. It was higher than his old laugh, softer, but it felt real. It felt like him.

“You’re still an idiot,” he said, shoving Osamu’s shoulder.

“And you’re still annoyin’,” Osamu shot back, shoving him in return. “Now come on. I’ll make dinner. And we can figure out the bra situation tomorrow.”

“I told you—”

“I know what you told me. But you’re gonna need one, and I’m not gonna let you suffer just because you’re embarrassed.”

Atsumu sighed, but there was no fight left in him. He followed his brother inside, the door closing behind them with a soft click. And for the first time all day, he felt like everything might just be okay.