The Shirtless Incident

In the Miya house, everything was a war. Last carton of milk? War. Remote? War. Personal space? Biggest war of all. Osamu never really bought into the whole door thing. Doors were more like suggestions—why knock when you can just walk in? Efficient. And Atsumu, for all his dramatics, had put up with it for seventeen years.

Then came the Shirtless Incident.

Three weeks ago, Tuesday afternoon. Unremarkable. Osamu needed a charger—phone at two percent, he had a new tuna mayo onigiri recipe to screenshot. He pushed open Atsumu's door without a second thought. His twin stood in the middle of the room, shirt in hand, completely bare from the waist up.

They both froze. The air got weird.

"What the hell, Osamu?!" Atsumu yanked the shirt over his head so hard the seams screamed.

"Ya should've locked the door," Osamu shot back, already backing out.

"Ya should've knocked! This is my room! My private sanctuary!"

"It's the same sanctuary ya snore in every night. Not much of a sanctuary."

Forty-five minutes of arguing. Atsumu decreed: Osamu would knock from now on. Or else. The "or else" was vague but scary—probably involving the rice cooker. Osamu grumbled but agreed. Even he knew when he'd crossed a line.

He'd been trying. Really. But old habits die hard, and the Miya household's knocking culture? About as solid as wet paper.

Which brings us to now: Thursday afternoon, three weeks post-treaty. Osamu was desperate for hair gel. His own supply had run out that morning—squeezed the tube till his knuckles ached, got a sad crusty glob. Tried water. His hair rebelled, defying gravity in directions that defied physics. He looked like a startled hedgehog.

Atsumu, of course, had a shrine of pomades and gels on his dresser. Osamu had borrowed before—without asking—and Atsumu threw a fit every time. But desperate times. His hair was committing crimes against aesthetics.

He sprinted down the hall, socked feet slipping on polished wood. Rice simmering on the stove—maybe ten minutes before it needed attention. Plenty of time to grab gel, apply, be back before the rice even thought about burning.

He reached Atsumu's door. His hand, on autopilot, wrapped around the knob. His brain finally caught up, screaming KNOCK! REMEMBER THE TREATY! but too late. He'd already turned it. Door swung inward.

And Osamu's world tilted.

Atsumu stood by his bed, facing the doorway. Jeans on—thank God—but above the waist, just a bra. Not a sports bra, not a bralette. Full-on, structured, underwire bra. And it was struggling. Because Atsumu had breasts. Big ones. The kind that would make a magazine model jealous. Pale, full, spilling over the lace-trimmed cups.

Time slowed. Black bra, delicate floral embroidery. Straps cutting into his shoulders. Center gore—Osamu didn't even know what that was, but now he was an expert—sitting flat against his sternum, fighting against the pressure.

Atsumu's eyes went wide. His hands, reaching for a shirt on the bed, froze mid-air. His mouth dropped open.

And then his breasts bounced.

Just a small bounce—a subtle jiggle as his body reacted to the shock. To Osamu, it was slow-motion disaster. He knew he should look away but some morbid part of his brain refused.

"Osamu," Atsumu said, voice dangerously low.

Osamu's brain buffered. "Uh."

Then Atsumu shrieked. High-pitched, earsplitting. He grabbed a crumpled t-shirt and hurled it with professional volleyball precision. It smacked Osamu square in the face, enveloping his head in cotton and fabric softener.

"GET OUT!" Atsumu roared.

Osamu staggered backward, arms flailing. His foot caught the doorframe—the stupid, unforgiving doorframe that was always an inch too high—and he toppled. Hit the hallway floor with a solid thump, back of his head connecting with wood. Stars exploded.

Above him, the door slammed shut, rattling the hinges.

Osamu lay there, sprawled on his back, Atsumu's shirt covering his face. Blinked up at the ceiling. His brother. A bra. Breasts. Big breasts. The kind belonged on a magazine cover, not on his twin's chest.

He sat up slowly, pulled the shirt off his head. Stared at it—white cotton, no design, size large—then looked at the closed door.

"I forgot to knock again," he muttered.

From behind the door, muffled but furious: "YA THINK?!"

"I'm sorry!" Osamu called, getting to his feet. His back ached. "I was in a hurry! The rice is on!"

"I don't care about yer stupid rice! Ya just saw—ya saw—" Atsumu's voice cracked. "Ya pervert! Those are private! My breasts are not for ya to see!"

Osamu's face was on fire. "I didn't mean to! Why were ya even wearing that?!"

"None of yer business! It's my body! I can wear whatever I want!"

"Yeah, but—ya don't—I didn't even know ya had—"

"That's because I hide them! For good reason! So my twin brother doesn't barge in and gawk at them like some kind of creep!"

"I wasn't gawking!" Osamu protested, even though his brain helpfully supplied the memory of definitely gawking. "I was shocked! There's a difference!"

"There's no difference! Ya looked! Ya saw everything!"

"I saw a bra, Atsumu. Calm down."

"Don't tell me to calm down! Ya don't get to tell me to calm down when ya just witnessed my—my configuration!"

Osamu pressed a hand to his forehead. His rice was probably boiling over. He could hear faint steam from the kitchen, promising burnt pot and ruined dinner. But he couldn't leave now—not with Atsumu having a full-blown meltdown.

"It's not that big a deal," Osamu tried, placating. "So ya have a chest. Lots of people have chests. I have a chest."

"Yers is flat! Mine is not! There's a huge difference, and ya know it!"

"Okay, fine, it's a big deal. But it's not like I'm gonna tell anyone. Who would I tell? Mom? She already knows."

"That's not the point!" Atsumu's voice wobbled. "The point is that ya don't knock! Ya never knock! And now I can't even change in peace without worrying that yer gonna bust in and see me in my—my unmentionables!"

Osamu leaned his back against the door frame. Cool wood against his heated skin. He sighed, long and heavy. "I've been trying, Atsumu. I really have. But my hand just… forgets."

"Then tie a string around yer finger! Write it on yer hand! Do somethin'!"

"What about ya? Ya could lock the door."

Pause. Telling.

"I… forgot," Atsumu said, smaller now.

"See? It's not just me. We both forgot."

"But ya walked in on me! Twice! The first time was bad enough, but now—now ya've seen the full armor, Osamu! The whole arsenal!"

Osamu snorted.

"Don't ya dare laugh!" Atsumu shouted, but less venom.

"Sorry, sorry," Osamu said, covering his mouth. "It's just—full armor? Arsenal? Ya make it sound like a weapon."

"It is a weapon! These babies can knock a man unconscious if I swing 'em right!"

That did it. Osamu doubled over, laughing openly. The absurdity—the bra, the bounce, the shrieking, the thrown shirt—all of it crashed over him. He laughed till his sides ached, till tears pricked his eyes.

"It's not funny!" Atsumu yelled, but Osamu could hear the hint of a smile.

When laughter subsided, Osamu wiped his eyes and knocked on the door. Gently. Three soft taps.

"Atsumu," he said, serious now. "I'm sorry. For real. I shouldn't have barged in. I know ya told me to knock, and I keep messin' it up. I'll do better. I promise."

Long silence. Osamu waited, heart pounding.

The door creaked open a few inches. Atsumu's eye appeared, suspicious and red-rimmed. He'd put on a shirt—loose grey hoodie that hung past his waist. He looked like a disgruntled turtle peeking out of its shell.

"Ya promise?" he asked, soft.

"I promise," Osamu said. "From now on, I'll knock. Every time. I'll even knock before I knock to make sure I remember to knock."

Atsumu's eye narrowed. "That's stupid."

"Yeah, but it's me. I'm stupid." Osamu gave him a small, earnest smile. "I'm sorry, 'Tsumu."

The door swung open fully. Atsumu stood there, arms crossed, still pouting. Cheeks flushed, hair mussed from yanking the hoodie over his head. He looked like a very dramatic, very angry cat startled off a counter.

"Fine," Atsumu muttered. "I accept yer apology. But if it happens again, I'm tellin' Mom ya walked in on me in the shower."

"Ya wouldn't."

"Try me."

They stood in the hallway, silence stretching. Osamu shifted, suddenly awkward. The memory of the bra—black lace, curve of flesh—forced its way back. His ears went red again.

"So," he said, clearing his throat. "Uh. Can I borrow yer hair gel?"

Atsumu stared at him. Then burst out laughing.

Loud, barking laugh, the kind he only let out when genuinely amused. He doubled over, clutching his stomach, laughter echoing down the hall.

"Ya—ya walked in on me in a bra," he wheezed, "and yer first thought—is hair gel?"

Osamu's face went from red to crimson. "I need it! My hair looks like a disaster! And yer the only one who has the good stuff!"

Atsumu straightened up, still chuckling, wiping a tear. "Fine, fine. Come on."

He turned and walked back into his room, leaving the door open. Osamu hesitated—was this a trap?—but followed.

Typical teenage disaster zone: clothes on floor, volleyball magazines stacked on desk, half-empty glass on nightstand. The bra was nowhere to be seen; must have hidden it during the argument. Osamu pretended not to notice the lump under the bedcovers.

Atsumu walked to his dresser, where an assortment of hair products stood at attention. He picked up a jar of the expensive gel—the one that cost three times as much—and tossed it.

"Here. Don't use too much, or yer hair will look greasy."

"Got it." Osamu caught it, turned to leave, then paused at the door. "Hey, 'Tsumu?"

"What?"

"Thanks. And… for real. I won't forget again."

Atsumu's expression softened. He walked over and punched Osamu lightly on the arm. "Ya better not. Or I'll hide yer rice cooker."

"Yer evil."

"I know."

They grinned at each other—the same grin, the one that said they were twins, bound together through all the weirdness and arguments. Then Osamu remembered.

"Crap! The rice!"

He sprinted out, nearly tripping again. Atsumu's laughter followed him down the hall.

---

Fifteen minutes later, Osamu had salvaged the rice—slightly scorched on the bottom but mostly edible—and applied the gel. His hair sat in perfect, glossy spikes. He was stirring miso soup when Atsumu wandered in.

"Smells good," Atsumu said, peering over his shoulder.

"It's just miso. Nothin' fancy."

"I'm hungry."

"Then make yerself a bowl."

Atsumu didn't move. Just hovered, hands shoved in hoodie pockets. Osamu sighed.

"Fine. Sit down. I'll make ya lunch."

"Yer the best, Sammy."

"Don't call me that."

They sat across from each other at the small kitchen table, steaming bowls of miso and rice in front of them. Atsumu added an obscene amount of chili oil. Osamu ate his plain. Comfortable silence.

Then Atsumu said, "So. Ya saw 'em."

Osamu choked on his rice. Coughed, pounded his chest. "Wha—can we not talk about this?"

"I'm just sayin'." Atsumu shrugged, smug grin spreading. "I've got an impressive rack, don't I?"

Osamu stared, horrified. "Are ya—are ya askin' me to compliment ya?"

"I'm just statin' a fact. Ya can't deny it. Ya saw 'em bounce."

"Stop sayin' 'bounce'!"

"They bounce, Osamu. They're bouncy. That's a thing."

Osamu dropped his chopsticks and buried his face in his hands. "I can't believe this is my life. I can't believe my brother is proud of his boobs."

"They're not boobs! They're pectoral enhancements!"

"They're boobs, Atsumu. Ya have boobs."

Atsumu puffed out his chest—more prominent now that Osamu knew what was under the hoodie. "'Boobs' is such a crude word. I prefer 'the twins.'"

"Don't call 'em that."

"Why not? I'm a twin. They're twins. It's thematic."

Osamu picked up his chopsticks and pointed them like a weapon. "If ya ever reference yer chest in my presence again, I will tell every member of the Inarizaki volleyball team that ya sleep with a nightlight."

Atsumu's grin faltered. "Ya wouldn't."

"Try me."

They glared across the table, standoff of sibling pride. Then Atsumu broke first, snorting.

"Fine, fine. Truce." He held up his hands. "But for the record, yer the one who barged in. So if anyone's the weirdo here, it's ya."

"I said I was sorry."

"And I accepted. But I'm still gonna bring it up at family dinners for the next ten years."

Osamu groaned. "I knew it."

They finished lunch with light banter, earlier tension dissolving into the easy rhythm they'd shared since childhood. Atsumu talked about a new defensive drill; Osamu complained about a customer who complained his onigiri was "too triangular." By the time they cleared dishes, the bra incident was filed away as another absurd chapter in the saga of the Miya twins.

As Atsumu left the kitchen, Osamu called out: "Hey, 'Tsumu?"

"Yeah?"

Osamu hesitated, then said, "For what it's worth… ya have nothin' to be embarrassed about. They're… nice. The twins."

Atsumu's face went pink. He ducked his head, hiding a smile. "Shut up, pervert."

But he said it without heat, and as he walked away, Osamu saw him puff his chest out just a little more.

And that, Osamu thought, was that.