ADHD!Izuku and Autistic!Katsuki
// this is my own little ficlet, teehee, I was going to write a list of headcanons and then it kept growing, so I might just make this a lil' mini series or something :)
Katsuki gets a recliner in his room during their second year and it becomes Izuku's favorite spot. He sits in it more than Katsuki does.
Whenever they hang out, whenever he needs a break, or just whenever he feels like it. It is to the point where Katsuki gives him a copy of his room key just so that he can sit down when Katsuki isn't there (that loser is the only person the blond would ever trust to have unfiltered access to his room).
Most of the time he only goes in there when Katsuki is already there, so there isn't much anxiety around handing over the key anyway.
And when Katsuki is in a terrible mood and isn't up for company, or if Izuku has had an especially overwhelming day, he will go in with his favorite headphones and just listen to music or play his switch while sitting in the chair. The two of them won't say a word and just co-exist, breathing in the same air, and find solace in each other. They can do this for hours.
Izuku will occasionally breathe too heavily because he was so focused on his music or game (or whatever it is that he is focusing on) that he will forget how to work his lungs. Sometimes Katsuki will bark at him for it or throw a pillow at him, but most of the time it is harmless.
Then there are times when will sway back and forth while he zones in on his homework so much that he actually knocks his water bottle off of the bed and the crash startles Izuku so much the boy yelps. After a second they both laugh at the hilarity of it and then go back to doing what they had been doing.
It is chill. It is just them being themselves.
Katsuki will usually sit on his bed or at his desk. And before the chair, Izuku either sat at his desk or on the floor (because even though Kacchan never said anything, it was obvious that he hated when people sat on his bed without him inviting them to do so first), so when the recliner showed up Izuku took that spot so fast Katsuki barely had a chance to try it out.
And perhaps that had been the blond's goal: get Izuku a comfy place to sit that wasn't the floor.
