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If there's one thing Katsuki remembered from his childhood, it was Deku's terrible sleeping habits.
The fucker would stay up half the night when they had sleepovers, not even trying to sleep when it was midnight. Katuski swore he could hear birds chirping by the time Deku finally shut up, lying down for the first time that night for a mere moment and then, just like that, he was asleep. The second his head hit the pillow he was out like a light, unconscious quicker than one of Aunty's glares that never failed to send him grovelling — pretty fucking fast.
And then Katsuki would finally fall asleep, would let the arms of Morpheus take him again… only to be woken two hours later to his alarm, feeling like he'd been run over by the truck in one of his manga rather than the usual, well-rested feeling he was used to. So then he tried to wake Deku, to shove the fucker that kept him up all night out of bed and get him to wake, but no matter what he tried, it didn't work.
He pushed the smaller boy, poked at him and shouted in his face, but no matter what he tried there was no waking Deku. So he went down stairs, somehow grumpier than usual, cranky in ways he shouldn't have been, angry at Deku for not going to bed on time. But he'd wake up soon, all Katsuki had to do was wait.
That's what he thought, of course, but he was wrong. God, he was so wrong. It was two in the afternoon when Deku woke, seven whole hours later. Katsuki had been waiting all day to play with him, to do something instead of sitting around and waiting for him to get up. But Deku woke up at 2pm, half an hour away from when his mum was coming to pick him up.
Katsuki was furious to say the least.
He knew now, though, to never engage with Deku past midnight. It would only waste valuable playtime the next day.
And Katsuki couldn't afford to do that.
However, his classmates, apparently, were stupid enough to encourage Deku's moronic insomniac tendencies and keep him up till 3am after a whole day of fighting dirt monsters and running through the forest. Idiots.
They had, unsuccessfully, tried to wake him, Kaminari shouting in his face while Todoroki prodded at his sleep-slack forehead like a moron, poking at his cheeks and making thoughtless humming noises when Deku didn't magically get up and wish them all a good morning. Iida had run to get Aizawa after a few moments screaming about 'disrespect' and the 'rude-ness' of it all.
It was, all in all, quite entertaining. The best thing though, the swiss meringue icing on the massive birthday cake he'd just been served, was when Aizawa finally came in.
The door slammed open, banging against the wall with a force that shook the room. Katsuki swore he saw dust falling from between the ceiling tiles with the action.
They all, of course, turned to state at whoever had just opened the door so dramatically. He could see on Kirishima's face light up at the sound where everyone else's faces only showed dread. Monoma, they all thought it was, but upon turning round to gawk at whoever had potentially damaged the wall, they were met only with a murderous lookign Aizawa, eyes glowing a deep, damgerous red.
Katsuki would've teased the other boy if he had the time — his little crush was painfully obvious, even if the redhead didn't yet realise it — but as it was, he was busy getting front row seats the smackdown of the century. This was bound to be entertaining.
Everyone stood as Aizawa took his first step, discarding their sleeping bags on the floor and standing in a line behind the sleeping form of Deku. Katsuki didn't care what kind of code he was breaking by not covering for Deku because fuck was this going to be funny. Everyone else had failed to wake the boy, so what did they think Aizawa could do?
A lot, apparently.
"Why am I here?" Aizawa growled, voice low and scratchy and dangerous from the early morning.
There was silence for a bit, one Katsuki was tempted to break with raucous laughter that shook his frame and made him wheeze. He didn't do it. He waited, watched as Aizawa's patience began to run dry.
"I asked you a question," He snapped, "I expect an answer."
There was a bit of shoving in the line, and suddenly Kaminari was standing in front of their teacher, trembling like a leaf in the wind.
"R– right," he bit out, shivering with the cold fear the hobo seemed capable of instilling in everyone, even Katsuki at times. "Well, you see, um. Mi– Midoriya has, uh. Well he– he hasn't–"
"No one can wake Deku," Katsuki said, rolling his eyes at Kaminari's antics, however genuine they seemed.
Aizawa looked at him for a long moment, squinting and judging him with those shitty little charcoal eyes. They passed eventually though, moving off his body and towards another of his classmates, Iida this time.
"Is that right?" Aizawa tilted his head to the side as he looked at Iida, an innocent action that looked so out of place on the man's murderous face.
"Yes Aizawa-sensei," Iida replied, hand chopping away as he spoke, "Midoriya has remained unconscious despite our many attempts to awaken him. It is after multiple of such attempts that we thought to involve you–"
"Right." Aizawa moved away from Iida, completely ignoring how he interrupted the poor boy.
He approached Deku's sleeping form, his mouth wide open as he slept, giving them all a fantastic view of the back of his throat.
Aizawa stood over him for a moment, seemingly contemplating something. And then, fast as light, he kicked Deku.
Katsuki nearly lost it then and there, howls of laughter threatening to jump from his throat and send him to the floor, but he somehow stayed standing. He couldn't, however, help the grin that had slowly spread over his face, the one that looked far too wide for his face, the one that barely kept the wheezing laughter inside.
They all waited, in silence for something, anything to happen.
And something did happen. Fuck did it happen.
Aizawa bent down, and instead of trying to wake Deku up, he grabbed a sleeping bag from the floor and lay down in it, zipping it up and rolling over, and proceeding to fall asleep. There was stunned silence for a few moments. And then the outrage began, the shouts of horror and injustice, Iida's confused questions of what Aizawa was doing letting Midoriya sleep in when they had Very Important Training to attend.
But Katsuki? Katsuki too, was on the floor though for a much different reason than sleep.
His cackles filled the air, echoing throughout the forest as he wheezed.
God, at least they knew now, that there really was no way to wake a sleeping Deku.