Disclaimer: I Do not own My Hero Academia characters.
MHA student boys when their S/O sneezes:
The kitten sneeze (a few tiny puffs of air that make up a sneeze):
Deku: Though he sneezes like this as well, the boy can't help but coo over your cute little kitten sneezes.
Bakugo: The brave and mighty Bakugo had an annoyed look on his face at your kitten sneeze. "What the hell was that?" He asks with what would have been annoyed look on his face (but the blush gives him away)
Kirishima: He immediately started to fawn over you, saying your kitten sneeze was too cute and manly.
Kaminari: Was low key shocked when he heard you and began to tease you. " What was that, babe?" He would ask, much to your annoyance.
Shoto: He immediately thought something was wrong, the poor boy. "What was that? You okay?" He would ask as his face had concern written all over it. When he finds out it was a sneeze, he's confused, "That was a sneeze?"
Sero: Started to instantly tease you about it, even after you threatened to use his tape to shut him up. "You sneeze like a cat, haha!"
Tokoyami: Was confused until you explained it was your sneeze. "Well, at least it's not a trumpet sneeze, dark shadow would have freaked."
Shinso: Well, the boy does like cats, and now he's all over you (whether you like it or not)
Iida: Gives you tissues, whilst trying to hide his blush at how cute you sounded.
Tamaki: He's staring at you bewildered, but ends up blushing when you tell him it was your sneeze.
Mirio: "You're too cute, Sunshine!" He would say as you try not to kill him over his comment.
Monoma: "Aw, you sneeze like a cat!" Will then tease you about it and avoid you trying to kill him.
The trumpet sneeze (impossible to miss due to the loud sound you make):
Deku: Was frightened when he heard that and immediately asked if that hurt you (very concerned if you tell him it does)
Bakugo: This is his type of sneeze, so he understands how you would feel after it, but does not leave comments out. "You feel better now, dumb ass?"
Kirishima: Is completely startled the second he hears it, "What on earth?" But when he learns it is your sneeze, he's more affectionate, "That sounded like it hurt."
Kaminari: Will not stop teasing you, "You sneeze like a freight train!" Even after you threaten to kill him for his comments.
Shoto: Is staring at you with a blank expression, but his voice shows all the concern, "You all right?"
Sero: Is like Kaminari with the teasing, and you have, on more than one occasion, started to beat the boy up, "I'm sorry! You're just to loud!" He would state as he laughs his ass off.
Tokoyami: Has to deal with dark shadow freaking out, the first few times it happens, but after a while dark shadow will get used to it, but not without cracking jokes, much to Tokoyami's dismay.
Shinso: If the boy was sleeping (which when is he not?) You will never hear the end of it. "I was trying to sleep when you brought the freight train in!"
Iida: Is giving you tissues whilst asking if you're okay since you seemed to have woken anyone in a mile radius.
Tamaki: Shit, you just scared the poor boy into oblivion. Be prepared to calm the poor boy down.
Mirio: Is laughing his butt off at you, whilst avoiding you trying to kill him.
Monoma: "What was that? Haha!" Will continuously tease you even after the deed is done.
The ear drum blower (you plug your nose last second and it feels like your ears will pop, how your ear drums haven't blown is amazing):
Deku: Is beyond concerned, "Don't do that, it must hurt!" He will cry even though you act unaffected by it.
Bakugo: "You are beyond dumb, you know that, right?" He will say, causing you to flip him off.
Kirishima: Poor boy is beyond concerned for you, "Don't hurt yourself!"
Kaminari: "Doesn't that hurt?" But when you tell him no, will find a way to tease you about it.
Shoto: His face may have no emotion, but he is concerned when you sneeze. "Does that hurt?"
Sero: Boy would not leave you alone for one second when you did it. "You're trying to kill yourself?" He'd ask in a joking manner.
Tokoyami: He's quiet about it, but is concerned nonetheless, as well as dark shadow who pops out to check on you.
Shinso: Usually he's too tired to respond, but will every once in a while make sure you're okay.
Iida: Be prepared for endless lectures on why you shouldn't be pluggling your nose when you sneeze cause you are only hurting yourself.
Tamaki: Poor boy is scared you hurt yourself, but when he finds out it's your sneeze, he will be attempting to tell you not to do that (though he doesnt have enough courage to get the full sentence out)
Mirio: "Don't hurt yourself, Sunshine!" Will then try and stop you from doing it again, much to your annoyance.
Monoma: I don't see this boy caring when it happens, but teasing you nonetheless.