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Midoriya has been planning this since day one of UA and he was determined. Today was the day. He would actually do it.
Step 1:
Wait for your victim to feel safe.
Him being in a good mood is the most important part of this. 'He's less grumpy than normally. Perfect.' Quietly following his unsuspecting victim with his eyes, Midoriya ticked it off on his to-do list.
He couldn't risk making any mistakes. It took him months of training to get in and he wasn't about to get expelled already. Especially not for something as silly as this.
Some might ask now why he was even doing it besides it being completely stupid. It's really simple; because he could and he was desperate.
Step 2:
Wait for them to relax
That step was pretty self-explanatory. Nobody likes to attack while your target is on defense mode. You just had to play a few video games to know that and Midoriya played more than a few.
He watched his victim turn around a corner, careful not to make any kind of sound. Getting caught while being in the vents probably wasn't a good idea regardless of the circumstances and the circumstances being him following his teacher wouldn't help either. He wasn't about to admit his plan to anyone. He still had a bit of shame and self preservation skills.
At least he could blame it on his mom for raising him too well.
He shuffled to catch up with his target which entered the teachers lounge. Still unaware of his follower in the vents.
Midoriya reached the vent cover of the lounge just in time to see his tired victim curl into himself in a randomly chosen corner. 'Again perfect' Mischievously smiling he ticked off the 2nd step and moved on to the next one.
This was a bit too easy.
Step 3:
Get them alone
Currently there were 3 other teachers in the lounge. Present Mic(rowave) correcting essays for one of his classes, All Might in his shrunken form and seemingly working on the next lesson and Midnight freshening up her makeup.
Midoriya silently turned down his screen brightness and checked the teacher's timetables.
How did he get access to those? A lot of hard work and a new found friendship with the principal.
Midnight had a lesson in about 5 minutes and the same with Present Mic but All Might wouldn't be gone for another 2 hours. He only got one free period; he can't wait 2 hours.
He could try again on another day but everything went perfectly and he might never get a chance like this. Regardless if he turned around now somebody would surely hear him. Which only leaves one option; proceed.
Step 4:
Get rid of All Might
'Maybe I can get him out of here somehow' Midoriya quickly thought of a solution. He didn't have much time.
Weeks of research showed that his sensei never stayed longer at one place than 30 minutes. The vents didn't go far enough for Midoriya to reach him if he decided to go outside. 'Stalker behavior - no now's not the time for self depreciation'
The green haired nuisance took a deep breath and grabbed his phone again, barely keeping himself from muttering.
Midoriya Izuku: Can u meet me in 5 minutes in the 2nd private lounge? :) Gotta talk to u rq!
'That should work' All Might never ignored any of his meetup requests before. The only thing he ever did right as a mentor.
He watched as Midnight finished up her makeup and turned to leave the room. 'Definitely gonna ask her for makeup tips. She looks absolutely stunning!'
Not even one minute later Present Mic(rowave) followed suit in a hurry. 'Gonna be late again?' The day Mic-sensei turns up on time will be the day the world explodes.
All Might still didn't move. 'Fuck'
'Why is he not moving?'
'Fucking move already!'
'I thought you loved me!'
'Oh' Midoriya threw a quick glance down to his phone only to realize; he forgot to press send. 'Fuck me'
Seconds later All Might finally left too.
Midoriya breathed a sigh of relief. Barely audible but the yellow sleeping bag still moved. Into the direction of the vents.
'Fuck Fuck Fuck' Quickly shuffling away from the covers, trying to make as less sounds as possible, Midoriya desperately prayed to every god he knew. He couldn't be caught now. He almost made it!
He listened intently for any signs of recognition. 'Turn back to sleeping! I'm a fucking rat!'
He nearly passed out out of relief when he peeked his head out and didn't see a very disappointed sensei and instead an unmoving yellow pile on the floor. He was back in the game!
Step 5:
Attack
The reason Midoriya was doing this isn't murder. It's a way nicer way of attack.
He was only trying to make his mom proud! After all, she was the one who always told him; everyone deserves kindness and of course a hug.
It was only logical for him to follow his teacher from the vents and plan the best way to hug him for multiple weeks (maybe months). It wasn't his fault that Aizawa-sensei's scarf looks very soft and it definitely didn't have anything to do with the fact that he didn't get hugged in months!
So like a completely normal and reasonable person he slowly unscrewed the vent covers. The screws were already barely fixed when he came here. Still careful not to make any abnormal sounds. He was too far gone to get caught now.
Slowly he climbed out. Aizawa-sensei was probably already aware of his presence by now but wrote him off as another teacher or maybe a noisy student. Not expecting it to be his noisy student.
Like a boy approaching a scared cat he walked forward. 'Don't mess this up.'
'Almost there'
Just as his teacher was about to turn around he threw himself at him. With a quiet grunt his Sensei pushed him off. Only for Midoriya to fully hug him like a mother does his child.
Aizawa never expected a quiet day. Maybe he expected villains or one of his students injuring themselves again but definitely not one of his students throwing himself at him to hug him.
"Soft" Midoriya murmured contently, pressing his face into his scarf (which was as soft as it looked).
"Problem child? What are you doing?" Aizawa spoke like a man done with the world and every single person on it.
"Hugging you"
"Why?"
"Why not?"
" … "
Dramatically sighing he put his arms around the teen. 'Is it too early for retirement?'
In less than a minute he could perceive little snores coming from his kid and simply accepted his fate and followed the problem child's example.
He didn't plan on getting a child at the end of the day but who can deny a cutely sleeping kid anything? Aizawa definitely couldn't.