Chapter Text
Waking up, Osamu knew he didn’t feel the same. He rubbed his eyes, ruffled his hand through his hair.
Creaking sounds came from his bed as he sat up and got annoyed as his eyes struggled to adjusting to the natural light of the sun falling into his room. And for some reason… his head was hurting like never before.
When his headache was starting to die down, he moved over towards the door, but suddenly his face met the floor. He’d fallen down.
“Huh?”
He stood back up, blinking twice before his eye sight focused on a piece of clothing on the floor.
“When did that get here?”
His feet trembled. Those were not his clothes down there on the floor, but Atsumu’s… Not one, but two pieces of clothing…
Why the fuck were Atsumu’s clothes dispersed around his room?
With a frown plastered on his face, one look around his room (that was finally a little more clear) showed him he wasn’t even in his own room at all. Had he fallen asleep in Atsumu’s bed?
He scratched his head again. He couldn’t remember if he actually had, and his memories told him he had fallen asleep in his own bed. Then why…
Osamu shook his head. Pondering on about it wouldn’t get him anywhere, so he decided to not be bothered anymore and get his day started.
It was a Saturday and he finally had time to perfect his onigiri recipe. Ever since he decided on opening his own shop he had been wanting to perfect his own unique recipe. Store planning and all that could come another day.
With breakfast being served by their mom, he didn’t have to work hard just yet. He greeted her, she said good morning back, and he got to eating.
Nothing seemed wrong yet, until he heard something — or someone — stumble down the stairs.
“‘Tsumu?” he wondered softly, and focused his eyes in anticipation on the door. If he remembered correctly their dad was already off for work.
“Morning,” a grumbly voice sounded.
“Morning, ‘Tsu…mu? Huh?”
“Huh?!” Atsumu exclaimed.
In front of him wasn’t Atsumu, it was his own body?!
“Morning, Osamu,” their mother greeted, not noticing anything off.
The two of them shared a look, another one at their mom and one more back to their twin.
Atsumu… in Osamu's body slowly strolled over to him, sitting down next to him. “Why am I looking at myself?” he questioned. “You're ‘Samu, I assume?”
Osamu sighed, whispering, “Yer not alone in this one, ‘Tsumu. And yes it's me.”
“How the fuck did this happen?” hissed his twin in whisper, making sure their mom didn’t hear him.
“Do I look like I know?”
“Well, yer usually the more ‘rational’—” Atsumu put his fingers up in quotation marks, “—one ya kno’.”
Osamu rolled with his eyes. “Right..”
Suddenly, Atsumu leaned into him and whispered: “Do ya, ya kno’, think that it’s got something to do with the collision on the court yest’rday?”
Osamu looked at him and sighed. “Again, how should I know?”
“Ya… oh.”
“It looks like it happened over night so I don’t know what we drank or ate or if it really was the collision, but something made it happen. We should probably hope for the best and maybe it will be over if we wait one more night. Yer lucky it's a Saturday, I guess.”
Atsumu huffed. “I guess yer right.”
“For now, let’s pretend we’re each other. I’ll sneak my onigiri ingredients upstairs so I can at least still practice, but let's not go to the gym hall to practice volleyball.”
“Right…” Atsumu said, but Osamu had the idea it wasn’t really making sense to him.
“Ya do know why I’m asking you this right?”
“Yeah…”
“Do you really?”
“No…”
“Thought so. You and I are not going to do anything suspicious. Ya can’t go to the gym hall because me spiking would be straight up absurd, same goes for me in your body preparing the onigiri.” Atsumu nodded a couple times. Osamu couldn’t help but add, “You also can’t physically show yourself to Sakusa-san, you know that right?”
Like a scared cat, Atsumu jumped up. He coughed, as if having choked on his spit. “Ahem, right. Right.”
Osamu chuckled. “Good to see we’re on the same page.”
“The same goes for you and Suna,” Atsumu told him in between breaths.
“‘Tsumu!” Osamu sneered, pinching his arm.
Atsumu grinned. “Gotcha.”
Osamu could only huff. “Anyways, have fun pretending to be me for the entire day. Let’s hope it will be only one day.”
Rolling his eyes, Atsumu groaned as well. “Fuck this day already.”
“Good luck, brother. You’ll need it,” Osamu sneered, before walking off and making sure to take all ingredients with him. “I’ll be in my room, not yours.”
“Sure, sure, ya better,” Atsumu groaned, staring at his brother’s back, glaring holes into it.
This day was for sure far from over and Osamu knew he would be so glad to be back in his own body.