Unlocked

The door clicked open and Osamu stepped in, already tugging his practice jersey over his head. Automatic. Muscle memory from years of coming home late. His shoulders ached from a long day in the kitchen, and all he wanted was to collapse onto his futon and stare at the ceiling until sleep showed up.

He froze mid-step, jersey bunched around his ears.

Atsumu was on his knees.

That wasn't unusual—his twin was always sprawled across the floor or furniture in some dramatic pose. But Atsumu wasn't alone. There was a guy, older, early twenties maybe, with messy brown hair and a hand fisted in Atsumu's peroxide-blond locks. And Atsumu's head was bobbing in a rhythm that left nothing to the imagination.

The guy's head snapped up. Eyes wide.

Atsumu pulled back, lips slick and shiny in the dim lamplight, and turned to see who'd interrupted. Something flickered across his face—surprise, maybe embarrassment—but it was gone before Osamu could name it. Instead, Atsumu just raised an eyebrow, slow and deliberate, like he'd been caught eating the last onigiri rather than with his mouth full of a stranger's dick.

"Samu," he said, voice rough but steady. "Door was locked."

Osamu's mouth opened. Closed. Opened again.

Nothing came out.

He backed up—one step, two—shoulder blades hitting the doorframe. The jersey slid down his face and he yanked it the rest of the way off, clutching it to his chest like a shield. "Sorry," he croaked. "I—I didn't—"

"Obviously," Atsumu said, with that sharp edge that meant I'm not embarrassed, you're embarrassed. "Can you—"

"Right. Yeah. Going."

Osamu fled.

He didn't stop until he was in the kitchen, leaning against the counter, heart hammering. The house was quiet—parents already asleep, floorboards creaking when the heating kicked on. Osamu stared at the refrigerator, at the persimmon magnet that'd been there since middle school, and tried to scrub the image from his brain.

Atsumu's mouth.

The guy's hand in his hair.

The wet, obscene sound of—

"Fuck," Osamu whispered, pressing his palms against his eyes.

He slept on the couch that night. And the next. And the one after that.

---

Three days passed. Then four. Then five.

The Miya household ran on a fragile, unspoken truce. Osamu ate at odd hours, when he knew Atsumu would be out or already done. He stayed late at the restaurant, offering to help with prep long after his shift ended, just so he wouldn't have to go home and face closed doors and that memory.

Atsumu acted like nothing happened.

He'd stroll into the kitchen in the morning, hair messy, wearing only boxers and an old Shiratorizawa T-shirt that should've been thrown out years ago. He'd pour cereal, grab a banana, and flash Osamu a grin—all sharp canines and false ease.

"Mornin', Samu. Sleep well?"

Osamu grunted and stared at his phone until Atsumu left.

At training, Atsumu was his usual self—flirtatious, loud, obnoxiously confident. He'd sling an arm around Aran's shoulders, call Suna a gremlin, make comments about the cheerleaders that made Kita sigh and pinch his nose. Back home, he continued his parade of late-night visitors, though he was careful now to lock the door and keep the noise down.

But between them, there was a wall.

Osamu couldn't look his brother in the eye.

It was stupid. They'd shared a womb, a bedroom, a life. They'd seen each other at their worst—Osamu held Atsumu's hair back when he got food poisoning from a dodgy convenience store onigiri; Atsumu sat with Osamu through every one of their grandmother's memorial services, silent and solid. Twins. Supposed to be closer than anyone.

But Osamu had never seen that.

And he couldn't stop seeing it.

The worst part was the questions. His brain, traitor that it was, wouldn't let it go. How long had Atsumu been doing that? Was he safe? Was he happy? Did he even want that, or was it just another performance, another mask?

Osamu didn't know. And the not-knowing was starting to itch under his skin.

---

Thursday night, just past eleven, something finally cracked.

Osamu was lying on the couch, scrolling through his phone without really seeing it, when he heard the front door open and close. Atsumu's footsteps padded down the hallway—lighter than usual, probably wearing those ridiculous fuzzy slides their mom bought him last Christmas.

The footsteps stopped.

Osamu didn't look up.

"Samu."

"What."

A pause. A long one. Then, softer: "Can we talk?"

Osamu's thumb froze over the screen. He stared at a photo of some food blogger's onigiri recipe—perfectly formed rice, glossy dark nori. He thought about how easy it would be to say no. To keep pretending. To let this silence stretch until it became normal, until they were two strangers sharing a roof instead of brothers who once finished each other's sentences.

But he was tired. So fucking tired.

"Yeah," he said, and sat up.

Atsumu shuffled into the living room. Gray sweats, loose tank top, hair pulled back with a scrunchie. Without his usual armor—no makeup, no smirk, no loud performative confidence—he looked younger. Like the kid who used to cry when Osamu got the last piece of cake.

He sat on the opposite end of the couch, leaving a careful space between them.

Neither of them said anything for a while.

Then Atsumu cleared his throat. "So. That was awkward."

"Understatement of the century."

"I know. I'm sorry." He picked at a thread on his sweatpants, staring at his hands. "I shoulda warned ya. Or put a sock on the door or somethin'."

"You shoulda just locked the door."

"I did! Ya just—" Atsumu's voice cracked, and he let out a shaky laugh. "Ya just walked right in like ya owned the place. Which, I mean, ya do. We both do. It's our room."

Osamu exhaled slowly, running a hand through his hair. "I shouldn't have just barged in. That's on me."

"No, it's—" Atsumu stopped. Started again. "Look, I'm not embarrassed about what I do. I'm not. But I didn't want ya to find out like that. I was gonna tell ya. Eventually."

"When?"

"I dunno. When I had a good enough script for it?" He let out a humorless laugh. "'Hey Samu, by the way, I let strangers eat me out on the regular. Pass the soy sauce.'"

Despite everything, Osamu's lips twitched. "That's a terrible script."

"I know. I'm workin' on it."

The silence that followed was different. Softer. Less like a wall and more like a bridge, tentative and untested. Osamu looked at his brother's profile—sharp jaw, slight downturn of his mouth, fingers fidgeting with that loose thread.

"Hey, Tsumu," he said, voice rougher than he intended. "Did ya ever… ya know…"

Atsumu turned to look at him, eyebrow raised. "Did I ever what?"

Osamu's face burned. "Did ya ever… have sex?"

For a moment, Atsumu just stared. Then he let out a startled laugh—bright and genuine, the first real laugh Osamu had heard from him in days. "Samu. Samu, I was literally on my knees with a guy's dick in my mouth. What do you think?"

"Okay, okay, shut up." Osamu pressed his hands to his cheeks. "I mean, like, all the way. Did ya ever—"

"Yes, Samu. I've had sex." Atsumu's voice was casual, matter-of-fact. Like discussing the weather. "Lots of times. With lots of people. Guys, mostly. Sometimes girls. Whatever feels good."

"Girls, too?"

"Yeah. Girls are soft." Atsumu's expression went distant, almost wistful. "They smell nice. And they make pretty sounds."

Osamu swallowed. His mouth felt dry. "I… I'm kinda seein' someone."

Atsumu's head snapped toward him, eyes wide. "Wait, what? Since when?"

"Few months now. Her name's Yuina. She works at the café next to the restaurant."

"And ya didn't tell me?!"

"Ya didn't tell me ya were lettin' strangers suck ya off, so I think we're even."

Atsumu opened his mouth, closed it, and conceded with a grudging nod. "Fair. What's she like?"

"She's… nice. Quiet. Reads a lot. Got this smile that makes me forget how to breathe." Osamu felt his face go even redder. "We've been takin' it slow. But I think… I think I wanna take the next step. With her."

"Then do it."

"It's not that simple."

"Why not?"

Osamu shifted on the couch, pulling his knees up to his chest. How could he explain the knot of anxiety in his stomach, the fear of messing up, of hurting her, of being laughed at for not knowing what he was doing? How could he admit that he'd spent his whole life watching Atsumu glide through social situations with effortless charm while he fumbled and said the wrong thing?

"Atsumu," he said, and his voice came out small. "I don't know what I'm doin'."

His twin's expression softened. "None of us do, Samu. We're all just wingin' it."

"But you—"

"I fake it 'til I make it." Atsumu shrugged, a fluid motion that bared his collarbone. "I've had enough practice to know the basics. But everyone's different. Ya gotta pay attention, ask questions, figure out what works."

Osamu stared at his hands. "I don't even know the basics."

Silence.

Then Atsumu said, slowly, like he was testing the words: "I could… show ya?"

Osamu's head shot up. "What?"

"Not like—" Atsumu made a face. "Not like that, ya perv. I mean, I could tell ya what feels good. On a woman's body. Since I've, ya know, been with enough of 'em."

"You'd do that?"

"Ya really think I'd let ya go into this blind and embarrass yourself?" Atsumu grinned, but there was something soft behind it. "We're twins. If ya fail, I fail. I've got a reputation to maintain."

"Ya don't have a reputation."

"I absolutely do."

Osamu huffed a laugh. "Fine. Show me."

---

Atsumu stood up, stretched like a cat, and padded toward their bedroom. Osamu followed, heart hammering. The room looked normal—futons laid out, blankets rumpled, a few manga stacked by the window. No evidence of the incident that had driven them apart.

Atsumu pulled open his closet and rummaged around before emerging with something red in his hands.

"Close your eyes," he said.

"Tsumu, what—"

"Just close 'em."

Osamu sighed and obeyed. He heard rustling fabric, the soft slide of cloth against skin, a few muttered curses. Then: "Okay. Open 'em."

He did.

Atsumu was standing in the middle of the room, arms spread wide, wearing a red lace bra and matching panties. The set was delicate—thin straps, floral patterns, just enough coverage to leave something to the imagination. His body was lean and muscled from years of volleyball, the soft curves of his chest visible through the sheer fabric.

Osamu's mind went blank.

"Tsumu."

"Shut up. They're comfortable." Atsumu adjusted the straps, settling the cups against his chest. "So. Lesson one: boobs. They're great. Ya wanna be gentle, but not too gentle. Firm and soft at the same time. Like ya're holdin' a baby bird that's also a grenade."

"Why are ya wearin' a bra?"

"Because it feels good, Samu. And because I wanted to show ya how to touch a chest properly." Atsumu stepped closer, and Osamu backed up until his calves hit the edge of his futon. "Stop lookin' at me like I've grown a second head. Ya wanted to learn, right?"

"I—yeah, but—"

Atsumu grabbed Osamu's wrist and pressed his palm flat against the cup of the bra. The lace was soft, scratchy-soft, and underneath, Osamu could feel the warmth of Atsumu's skin, the slight give of flesh.

"Feel that?"

Osamu's voice cracked. "Yeah."

"That's what a bra feels like. Most girls wear 'em. Some don't. If ya're takin' one off, do it slow. Don't yank it down like ya're openin' a soda can." Atsumu demonstrated, reaching behind his back with his free hand and unclasping the bra with practiced ease. The straps slid down his shoulders, and he let the fabric fall away, baring his chest.

His breasts were small but full, pale nipples tightening in the cool air.

Osamu made a sound—half strangled scream, half groan.

"Focus, Samu." Atsumu took his hand again and guided it to his chest, pressing Osamu's fingers against the soft curve. "Hold it like this. Gentle. Ya're not grabbin' a volleyball. Ya're holdin' somethin' precious."

"I'm holdin' your chest."

"And it's precious. Get over it."

Osamu took a shaky breath. The skin under his palm was warm, softer than he'd expected. He could feel Atsumu's heartbeat, steady and calm. Slowly, so slowly, he adjusted his grip, cradling the weight of his twin's breast in his hand.

"Like this?"

"Yeah." Atsumu's voice was softer now. "Now squeeze. Gently. Like this."

He placed his own hand over Osamu's and squeezed—a slow, firm pressure compressing the flesh slightly. Osamu followed, fingers curling, feeling the texture of skin and the subtle firmness beneath.

"Good," Atsumu breathed. "Now the other one. Use both hands."

Osamu reached up with his left hand, cupping Atsumu's other breast. He held them both, warm and real, thumbs brushing over the nipples by accident.

Atsumu shivered.

"Sorry!"

"It's fine. That—that actually feels nice." Atsumu's voice was a little breathless. "See? Nipples are sensitive. Some girls like 'em touched, some don't. Ya gotta ask. But if she does, be gentle. Circles, not pokin'. Use the pads of yer fingers."

Osamu nodded, face burning. He was hyper-aware of every detail—the slight hitch in Atsumu's breath when he moved his thumb, the way the skin pebbled under his touch, the faint scent of Atsumu's body wash mixing with something warmer underneath.

Then Atsumu said: "I like it when partners milk my chest."

Osamu's hands stopped. "What?"

"Milk. Like—" Atsumu placed his hands over Osamu's again and squeezed—push, release. Push, release. "Feels like bein' taken care of. Like I'm bein' held. Ya can do it with yer mouth, too, but that's for later."

Osamu's brain was static. He was holding his twin's chest. His twin was teaching him how to touch someone. And his twin had just said milk in a context that made his stomach flip.

"Tsumu," he said, voice thin. "Are we allowed to do this?"

"We're twins, Samu. There's no rule book." Atsumu's eyes met his, steady and unashamed. "I'm doin' this because I love ya. And because I want ya to be happy. If this is what it takes, then this is what we do."

Osamu's throat tightened. He squeezed Atsumu's chest once more—gentle, reverent—before letting his hands drop to his sides.

"Thanks," he said, the word clumsy and inadequate. "I—thanks."

Atsumu smirked, but there was a softness in his eyes. "Don't thank me yet. We've still gotta talk about safe sex."

---

They sat cross-legged on the floor, facing each other, Atsumu still half-dressed in just those red panties. He'd pulled the bra back on but left it unhooked, straps dangling loose.

"Condoms," Atsumu said, ticking off on his fingers. "Always. No exceptions. Even if she says she's on birth control. Even if she says she's clean. Ya wrap it up every time, or ya don't do it at all."

"I know that."

"Do ya, though? 'Cause I know plenty of guys who 'know' and then get all whiny when a girl asks 'em to put one on." Atsumu's voice hardened. "Don't be that guy, Samu. Be better."

"Okay. Condoms. Got it."

"Good." Atsumu looked down at his hands, and his voice dropped. "And… if something happens. If the condom breaks, or if she forgets her pill, or if ya're stupid and don't use one. She might get pregnant."

Osamu's stomach clenched. "I'd take care of her. I wouldn't leave her alone."

"I know ya wouldn't. Yer not that kinda guy." Atsumu paused. "But sometimes, even if ya wanna take care of it, it's not that simple. Sometimes ya gotta make a choice ya don't want to make."

"What do ya mean?"

Atsumu was quiet for a long time. The lamplight caught the curve of his shoulder, the delicate line of his collarbone, the faint shadow of a bruise on his neck that Osamu hadn't noticed before.

"I've had two terminations," Atsumu said, flat and matter-of-fact. "Because I wasn't ready. Because I couldn't bring a kid into my life when I'm still tryin' to figure out who I am."

The words hung in the air, heavy and sharp.

Osamu's breath caught. "Tsumu."

"I'm not ashamed of it." Atsumu's chin lifted, defiant. "It was the right choice for me. But it's not an easy choice. And it's not something ya can undo. So be careful, Samu. Be so fuckin' careful that ya never have to make that call."

"I—" Osamu's voice cracked. "Why didn't ya tell me?"

"Because I didn't want ya to look at me different." Atsumu's voice was barely a whisper. "Because I didn't want ya to think I was broken."

Osamu reached out and grabbed his twin's hand, squeezing tight. "Yer not broken. Yer my brother. And I love ya."

Atsumu's breath hitched. For a moment, his composure cracked, and Osamu saw the fear and the vulnerability underneath—the boy who needed to be held, who needed to be told he was okay.

Then Atsumu grinned, sharp and bright, and the mask was back in place. "Okay, enough serious stuff. Ya got more questions or what? I'm a very busy man, I've got a reputation to maintain."

"Ya don't have a reputation."

"I absolutely do."

---

They talked for another hour, sprawled across the floor in their pajamas like when they were kids. Atsumu answered every question with brutal honesty—how to go down on a woman, how to tell if she's enjoying herself, how to be gentle and firm and everything in between. Osamu took mental notes, face burning the whole time, but he listened.

When the conversation finally wound down, Osamu let out a long breath.

"So I just… ask her?"

"Ask her what she likes. Tell her what ya like. Communicate." Atsumu sat up, stretching his arms over his head. "It's not rocket science, Samu. It's just sex."

"What if I mess up?"

"Then ya try again. And again. And again." Atsumu reached over and ruffled Osamu's hair—a gesture so familiar it made Osamu's chest ache. "Don't overthink it, Samu. Just be gentle and ask her what she likes."

Osamu nodded. "Okay."

"Okay."

They sat in silence for a moment. Then Atsumu leaned over and rested his head on Osamu's shoulder, his body warm and solid. Osamu tensed for a second, then relaxed, letting his head rest against his twin's.

The room was quiet. The lamp hummed. Outside, the night was dark and still.

"Thanks, Tsumu," Osamu said, voice rough.

"Anytime, Samu."

They stayed like that, leaning on each other, two halves of a whole. The awkwardness was gone, replaced by something deeper—trust, love, the unshakable bond of twins who had seen each other at their worst and still chose to stay.

Osamu closed his eyes and let himself breathe.

For the first time in days, everything felt like it might be okay.