Twin Steps

The first cramp hit Atsumu like someone drove a spike into his gut.

He rolled over in bed, clutching his stomach, and groaned. The clock said 6:47 AM—already late. He'd meant to get up ten minutes ago, stretch, hit the bathroom before Osamu started pounding on the door. Instead, his body decided to betray him again.

He squeezed his eyes shut, tried to breathe through the twisting pain. Fourth time in three months. First time, he ignored it and went to practice, ended up collapsing in the locker room. Osamu found him there, pale and sweating, dragged him to the nurse. The nurse asked questions Atsumu didn't want to answer. He said it was a stomach bug.

He knew what it really was. Had known for years, ever since the changes started—the ones that made him want to peel his own skin off. But knowing didn't help. It only made the cramps worse, because they weren't just physical. They were loud, humiliating reminders that his body refused to cooperate with who he was.

Another cramp seized him. He curled into a ball, face pressed into the pillow. Sheets damp with sweat. He couldn't do this today. Couldn't walk through those halls feeling like this, looking like this, smelling like stale blood and shame. For the first time in his life, he decided to skip.

Footsteps in the hallway—their mother's light tread, then Osamu's heavier one. Their voices drifted through the thin walls.

"Atsumu's not up yet?"

"Dunno. I'll check." A knock on his door. "Tsumu! Breakfast's ready. You're gonna be late."

Atsumu didn't answer. He pulled the blanket over his head and willed his twin to go away.

"Oi, Atsumu." Another knock, harder. "I'm coming in."

The door creaked open. Atsumu kept his face buried, but he could feel Osamu's presence in the doorway, the weight of his gaze.

"You okay?" Osamu's voice lost its impatient edge.

"Go away," Atsumu mumbled into the pillow. "I'm not going today."

A pause. Then the soft click of the door closing. Osamu's footsteps retreated, and a moment later, Atsumu heard him talking to their mother in low tones. Couldn't make out the words, but didn't need to. Osamu would explain. He always did.

He drifted in and out of sleep, cramps ebbing and flowing like waves. At some point, he heard the front door close—their mom leaving for work. Then the house fell silent.

He was just starting to relax when his bedroom door opened again.

Atsumu didn't move. Figured Osamu came back for something—maybe his volleyball bag, left in the corner yesterday. But the footsteps didn't head for the bag. They came closer, stopped right beside his bed.

"Tsumu."

He didn't answer.

"I know you're awake. Ma told me to check on you before I left."

"Then go to school already," Atsumu croaked. "I'm fine."

"You don't sound fine."

A hand touched his shoulder, gentle but firm. Atsumu flinched and turned his head just enough to glare at his brother. Osamu's face was unreadable, but his eyes were sharp, scanning Atsumu's pale, sweat-sheened face.

"Stomach bug," Atsumu lied.

Osamu's gaze dropped to the sheets. Atsumu followed his line of sight and felt his blood turn to ice.

He'd shifted in his sleep, and the blanket had slipped, exposing the mattress. Right where he'd been lying was a dark, damp stain—large and unmistakable. Blood.

Atsumu's stomach dropped. Heat rushed to his face, then away, leaving him cold and shaky. He yanked the blanket back up, covering the stain, but it was too late. Osamu had already seen.

For a long, agonizing moment, neither of them spoke. Atsumu could feel his brother's silence like a physical weight, filling the room with something thick and unspoken. He wanted to scream, to throw something, to disappear into the floorboards. Instead, he squeezed his eyes shut and waited for the inevitable—the awkward apology, the hasty retreat, the pity that would make him feel even worse.

But Osamu didn't say anything. He just straightened up, turned, and walked out. The door clicked shut softly behind him.

Atsumu let out a shaky breath. The tears he'd been holding back spilled over, hot and humiliating, soaking into his pillow. He hated this. Hated his body. Hated that Osamu had to see it, that he couldn't even keep this one private thing to himself.

He stayed in bed for another hour, until the cramps subsided enough for him to drag himself to the bathroom. Cleaned up, changed his sheets, threw the stained ones into the laundry with trembling hands. Then shuffled to the living room, grabbed the hot water bottle their mom kept in the freezer—she always had one ready for her own cramps—and collapsed onto the couch.

He was still lying there, one hand pressed over the hot water bottle on his lower stomach, when the front door opened again. Atsumu tensed. Too early for their mom to be back.

Osamu walked in, school bag slung over one shoulder. He kicked off his shoes and padded into the living room, not looking at Atsumu directly.

"You didn't go?" Atsumu asked, his voice raspy.

"Decided I didn't feel like it either." Osamu dropped his bag by the door and walked over to the couch. He stood there for a moment, as if deciding something, then sat down on the opposite end. Not too close, but not far. Just there.

Atsumu stared at him. "You're an idiot."

"Takes one to know one."

They fell into silence. Atsumu expected questions, or jokes, or some kind of awkward brotherly talk. But Osamu just pulled out his phone and started scrolling, his presence a steady, quiet comfort at the edge of the couch.

Exactly what Atsumu needed. No words, no pressure. Just someone being there.

The cramps eased as the hot water bottle worked its magic. Atsumu closed his eyes and let himself relax for the first time all morning. He must have dozed off, because the next thing he knew, he was being jostled by a weight landing on his legs.

He yelped and opened his eyes to find Osamu sitting on his calves, grinning like a menace.

"What the hell, Samu?!"

"You looked too comfortable." Osamu poked his side. "Get up. You've been moping all day."

"I have not been moping. I've been recovering."

"Same thing." Osamu poked him again.

Atsumu tried to kick him off, but his legs were weak and Osamu was heavier. So he did what he always did when he wanted to annoy his brother: launched himself at Osamu, tackling him sideways onto the couch.

They wrestled for a few seconds, a tangle of limbs and grunts. Atsumu managed to get on top, straddling Osamu's waist and pinning his wrists to the cushion. He was still sore, but adrenaline and sheer spite carried him.

"Ha! Who's laughing now?" Atsumu crowed.

"You're crushing my ribs," Osamu wheezed.

"Good."

But then Atsumu felt it. A wet, warm sensation spreading beneath him, right where he was sitting on Osamu's pants. His blood went cold.

He scrambled off so fast he nearly fell off the couch. His eyes went wide as he looked down at his own shorts—the dark, telltale stain blooming on the fabric. Then he looked at Osamu's pants. There was a patch of red on the thigh, still fresh.

"Oh no. Oh no, no, no." Atsumu's hands flew to his mouth. His face was on fire. "I'm so sorry. I—I thought I was okay, I changed before coming out here, I—"

"Relax," Osamu said, sitting up and looking down at his own pants. His voice was calm, almost amused. "It's fine."

"It's not fine!" Atsumu's voice cracked. "I got blood on your pants! That's disgusting!"

Osamu shrugged. "Not the first time."

Atsumu froze. "What?"

"Remember when we were like, five?" Osamu wiped at the stain with his thumb, as if it were nothing more than ketchup. "You had that diarrhea incident in the park. You were crying, and I let you wear my spare shorts while you waited for Ma to come. I had to walk home in nothing but my underwear."

Atsumu stared at him, the memory surfacing through the haze of embarrassment. It was true. He'd been mortified then too, and Osamu had handled it the same way—calm, matter-of-fact, like it was no big deal.

"That's different," Atsumu muttered.

"It's not, really." Osamu finally looked at him, his dark eyes steady. "You're my twin. You've done grosser stuff. This is just part of having a body."

Atsumu felt the sting behind his eyes again. He blinked rapidly, refusing to cry in front of his brother. "You're so weird, Samu."

"Takes one to know one."

A laugh bubbled up out of Atsumu's chest, surprising him. It was rusty and broken, but it was real. Osamu grinned, and soon they were both laughing, the tension dissolving into something lighter.

"Go change," Osamu said, shoving his shoulder. "I'll deal with my pants."

Atsumu nodded and hurried to his room, feeling a little less heavy than before.

---

A few days later, Atsumu was back at school. The cramps had faded, and he felt almost normal—except for that gnawing awareness of his body beneath his uniform. He'd worn a tank top under his shirt, the one he'd bought online that was supposed to be a "sports bra" but was really just a stretchy compression top. It didn't bind properly, but it was better than nothing.

The morning passed without incident. He went to class, snapped at a few teammates, and ate lunch with Osamu on the rooftop. He was starting to think maybe the embarrassment from a few days ago was behind him.

Then came fourth period.

Mr. Tanaka, a middle-aged teacher, was lecturing about something Atsumu didn't care about. Atsumu was slouched in his seat, doodling in his notebook, when he heard a low whistle from the row behind him.

He turned to see two boys from the volleyball team—Matsuda and Ikeda—grinning at him.

"What?" Atsumu said, his voice flat.

"Nice tank top, Miya," Matsuda said, wiggling his eyebrows. "Didn't know you were into that fashion."

Atsumu looked down. His school blazer was off, and he'd unbuttoned the top button of his shirt, revealing the strap of his tank top. It was nothing special—just a gray racerback. But Matsuda's eyes were fixed on his chest, and Atsumu felt a cold wave of unease wash over him.

"Shut up," he said, turning back around.

But Mr. Tanaka had noticed. He stopped his lecture and looked at Atsumu with a frown.

"Miya, put your jacket on. You're showing too much collarbone."

Atsumu blinked. "What?"

"You heard me. That's not appropriate for the classroom." Mr. Tanaka gestured at his neck. "Cover up."

Atsumu's face went hot. "I'm not showing anything." He gestured at a girl in the front row, who was wearing a tank top under her own unbuttoned shirt, her collarbone equally visible. "She's wearing the same thing."

Mr. Tanaka's eyes flicked to the girl, then back to Atsumu. "That's different. You're filling it out more."

The words hit Atsumu like a slap. Filling it out. He knew exactly what the teacher meant. His chest was visible. He couldn't hide it, no matter how much he slouched or crossed his arms. He was developing, and his body was betraying him in front of everyone.

The class went silent. A few students snickered. Atsumu felt his ears burn, his vision blurring with angry tears.

"I said put your jacket on," Mr. Tanaka repeated, annoyed. "Or go to the office."

Atsumu grabbed his blazer and yanked it on, fumbling with the buttons. His hands were shaking. He didn't trust himself to speak, so he just stared at his desk, counting the grains of wood until the teacher turned back to the board.

The rest of the period was a blur. He didn't hear a word. Just sat there, feeling the weight of stares on his back, replaying the teacher's words over and over. Filling it out. Different.

When the bell rang, he bolted out of the classroom before anyone could talk to him. Didn't go to lunch. Didn't go to the rooftop. Went behind the gym, where no one ever went, and slumped against the wall.

He sat there, knees drawn to his chest, and let the tears fall.

---

Osamu found him there, twenty minutes later.

He didn't say anything at first. Just sat down beside him, close enough that their shoulders almost touched, and waited.

"How did you know I was here?" Atsumu asked, his voice hoarse.

"Lucky guess." Osamu pulled out a bento box from his bag. "You didn't show up for lunch. Figured something happened."

Atsumu wiped his nose on his sleeve. "It's stupid."

"Probably is. Tell me anyway."

So Atsumu told him. About the boys whistling, about Mr. Tanaka's comment, about the way everyone had looked at him. He didn't hold back. Let the anger and hurt spill out, his voice cracking in places.

When he was done, Osamu was quiet for a long moment.

Then he said, "That teacher's a dick."

Atsumu let out a wet laugh. "Yeah."

"And those guys on the team? I'll beat them up if you want."

"No, you won't."

"No, I won't." Osamu nudged his shoulder. "But I'll glare at them real hard."

They sat in silence. The sun was warm on their faces, and the sound of practice drills drifted from inside the gym.

"You know," Osamu said slowly, "you're still my twin. No matter what."

Atsumu looked at him. "What's that supposed to mean?"

"It means I don't care what you look like. You're Atsumu. You're an annoying, loud, god-awful setter who eats the last of the ice cream and leaves the cap off the toothpaste. That's who you are." Osamu met his eyes. "Everything else is just... details."

Atsumu's throat tightened. He wanted to argue, to deflect with a joke, but the words stuck. Instead, he leaned into Osamu's side and let himself be held.

"Idiot," he murmured.

"Same."

They split the bento, eating in silence. It was the best meal Atsumu had had in days.

---

That evening, Osamu knocked on Atsumu's door.

"Hey. Get dressed. We're going out."

Atsumu looked up from his phone, frowning. "Where?"

"Just out. Put on a hoodie."

They ended up at a small shop in the backstreets of the shopping district, one that Osamu had apparently researched on his phone. The sign said it sold "medical supplies and supportive garments." The clerk was a quiet woman who asked no questions and showed them to a rack of binders in various sizes and colors.

Atsumu stood there, staring at the rows of fabric, feeling overwhelmed.

"How did you know about this place?" he asked, his voice small.

Osamu shrugged. "I did a search. 'Binder shops Hyogo.' Found it."

Atsumu didn't know what to say. He hadn't told Osamu he wanted a binder. He hadn't told anyone. But somehow, his brother had figured it out.

He picked out a black binder in his size—the clerk helped him measure discreetly—and bought two more online with Atsumu's phone. The whole process took less than twenty minutes.

On the way home, Osamu said, "You can wear a thin undershirt under your uniform to smooth things out. And a jacket over it. If anyone asks, say you're cold. People won't question it."

"They'll say I'm weird."

"You're already weird. This just gives them a better reason."

Atsumu shoved him. "Shut up."

But he was smiling.

Back at home, they flopped onto the couch. Their mother had left ice cream in the freezer, and Osamu scooped two bowls. They ate in comfortable silence, the TV playing an old volleyball match.

"Hey, Samu?" Atsumu said, halfway through his bowl.

"Hm?"

"Thanks."

Osamu didn't look at him. He just tilted his bowl, offering Atsumu the last bite of his ice cream.

Atsumu took it.

They watched the rest of the match, arguing about serves and receiving, their voices rising and falling like a familiar rhythm. Outside, the summer evening settled into twilight, warm and gentle.

Atsumu's body still didn't feel right. The cramps would come back. The stares at school wouldn't stop. There would be more days where he wanted to disappear.

But tonight, on this couch, with his twin by his side, he felt a little less alone.

And that was enough.