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"Kita-san?"
"What, did you dream of Kita-san?"
Atsumu blinks his eyes open - sharp pain registering on his head as he tries to sit up. He slowly rubs his fingers on his temple.
"Samu?" He asks when his vision clears to the sight of his twin in their room changing clothes.
"How are you feeling?" Osamu glances back at him. "I woke you up because you haven't even changed your clothes, dumbass."
"Oh," Atsumu looks down to check himself.
He's on Osamu's bed, still wearing his Inarizaki gym uniform. He went home earlier today because he wasn't allowed to join the club practice even after insisting that his cold isn't a big deal.
On the bedside table is the care package that their captain prepared for him, with a few pickled plums missing - which he then remembers he ate earlier - a half-empty bottle of lemon water, and an unopened bag of cough drops.
"Guess I fell asleep," he murmurs.
"That sick, huh?" He hears Osamu answer. When Atsumu looked up, he was met with clothes landing on his face that his brother threw at him.
"Hey! Can you-"
"I prepared the bath, you can go if you're up to it. But anyway you really need to change clothes, I don't appreciate you sleeping on MY bed like that."
Atsumu tries to get out of the bed, his feet and eyes falling to the cold floor, but he does not stand up yet. He feels tired and his body feels heavy, so his mind contemplates, trying to weigh the pros and cons of taking a bath.
Osamu looks at him and lets out a sigh. "You're sleeping on the bottom bunk tonight, okay? It would be a bother if you fall from the top when you're going to the toilet in the middle of the night."
Atsumu looks back at him and lets out a sigh too. "Yeah, yeah," he replies then stands up to take his steps towards the shared bathroom inside their room.
"Bet you haven't eaten anything yet besides the food Kita-san gave you, right? I'll go make some porridge while you bathe, so you can drink some meds after."
"Osamu," he calls as he stops in his tracks.
He turns around to take a look at his brother. "You, you're surprisingly caring, huh?"
"HUUHHH??!!" Osamu looks at him - a grimace full of disgust on his face.
"I-I'm just-?! Mom's not gonna be home tonight and she'd be overly worried tomorrow when she learns that you're still sick! So you better hurry your ass up and get well!"
Osamu yells, sounding way too defensive than he should.
"Samu-"
"Okay, shut up and stop being gross," Osamu goes out of their room and slams the door.
----
Atsumu somehow felt refreshed after taking a quick bath. He went downstairs to their kitchen, Kita's care package in his hand so he can put them in the fridge.
"BakAtsumu! Why are you here? I was gonna bring the food upstairs!" Osamu is on the stove, preparing the porridge he promised.
Atsumu pulled one of the chairs on their dining table and took a sit. "Samu, you should stop yelling, you're giving me a headache again."
The younger twin just shoots him a glare.
"Don't worry, I'll be 100% back tomorrow. I can't live another day without playing volleyball."
"I'm not worr-"
"And stop overreacting - you're really sounding and looking like Mom now." Atsumu grins at him.
Gray eyes widened for a second, before Osamu turns away, attention back to his cooking.
"Okay, I changed my mind. I'm eating all this porridge to myself."
"Samu!" Atsumu groans in pain.
----
When the lights are out, and while Osamu is on the top bed, busy playing games by himself on his phone, he hears a sound from the bottom bed.
"Samu?"
"What? You know you should be sleeping already, right?" He scolds his older twin.
He hears his brother mumble something but it's too soft that he can't decipher what the words are. Sighing, he decides to pause his game, and peeks his head to the bottom bunk to check on him.
"What?" Osamu raises his brow at the sick brother who looked comfortable and sleepy on his bed.
"Samu, Can you like-" Atsumu gets interrupted by his own yawn.
"... sing a lullaby for me just like you used to whenever I get sick when we were kids?"
Osamu doesn't wait for eight seconds and grabs the nearest pillow - sends it flying the way he does to a ball when doing his serves. "Shut the fuck up and sleep!"
Atsumu gets knocked out.
----
Atsumu wakes up feeling well the next day. He boasts to everyone how Osamu took care of him.