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All Might groans, pressing a hand against his forehead in a futile attempt to soothe his pounding headache. Ever since he awoke, the headache has refused to go away, making his head throb when he stands up or moves or even tries to think too hard. His fingers are freezing against his face, showing that his fever is getting worse than ever.
Last night, All Might shivered violently as he lay in bed, wracked by endless shivers until he finally fell asleep covered by a huge pile of blankets. But then he awoke drenched in sweat and burning hot, and has had a fever ever since.
He feels awful. It’s hard enough to force his weary body to get dressed, let alone take the journey to UA and teach students all day; all he wants to do is curl up in bed with a flannel on his head and sleep until he starts to feel more normal again. But he can’t. Because he is a Hero. And a Hero can’t have the day off just because he’s a bit run down.
So even though he is sick, All Might takes his usual commute to UA. And even though he takes pride in always helping people in need, All Might lets out a groan upon encountering a villain. This villain has a fire Quirk and is happily setting fire to the buildings around him, whilst various Heroes try to both contain the fire and evacuate terrified bystanders.
And even though his legs wobble and he can barely hold his Hero form, All Might lets out a slightly hoarse but still booming laugh and yells, “I AM HERE!”
As always with All Might’s appearances, everyone smiles and cheers when he arrives, the crowd parting to let him past the barriers and stalk towards the villain. No one seems to notice his flushed face and trembling limbs.
But the good thing about One For All is that he is still extremely strong even when not at his best. So although he probably could do it quicker, All Might still manages to perform a powerful smash, knocking the villain out cold. And as the fire department arrive to put out the fires, All Might restrains the unconscious villain before handing him over to the police.
However, he trembles violently when he gets away from the crowds, turning back into his weak form the moment he is alone. But after exerting himself during the brief fight with the villain, All Might finds his guts churning with nausea. Without a stomach it is impossible to feel sick in the way you do with a stomach, but All Might knows from personal experience that he can still vomit. And it is still an experience he doesn’t want to go through.
So he walks slowly on his way to UA, a hand braced against his stomach as his head pounds, and ends up arriving late. It is agony to change back into his Hero form upon approaching the campus, and All Might groans. By the time he reaches the staff room, All Might is steaming and collapses onto a couch as he turns back to normal. He rests his head in his hands, taking deep, shaky breathes and trying to stop feeling so ill. It doesn’t work.
“Are you okay?”
All Might looks up to see Yamada Hizashi standing over him.
He forces himself to smile. “Yeah, I’m fine. Just a bit tired.”
“Really?” Yamada says.
Even though it hurts his head, All Might nods. “Yeah. I’m okay.”
---
He staggers his way through the rest of the school day, and nearly faints on his commute home. Thankfully, All Might doesn’t encounter any villains on his way home, and soon he is back at home, stripping off his clothes and running himself a cold bath.
All Might groans as he sinks into the cold water, his burning skin finally starting to cool down. He lets his head rest against the side of the bathtub, eyes fluttering closed as pain and heat surges through his already weakened body.
When his fever finally starts to break, All Might throws on some clothes and collapses into bed, dehydrated and in agony and now shivering from lowering his body temperature too quickly. He pulls a pile of blankets over him and manages to fall asleep.
---
All Might is jolted awake by someone knocking on his front door. A quick glance at the clock shows it is only 6pm, meaning he barely slept at all. He doesn’t feel any better, but at least he isn’t worse. Still, it’s incredibly hard to drag himself out of bed and into the hallway.
Bracing his hand against the wall, All Might tries to catch his breath, but ends up overhearing the people outside speaking.
“I told you he looked like shit.” That’s Yamada, loud and blunt like always.
“Yes, so why didn’t you stop him going back to work?” Aizawa says.
“Because he told me he was fine. I didn’t wanna start a fight with him, you know.”
Cutting off the couple’s bickering, All Might opens the door. Yamada’s smile falls off his face when he sees him, whilst Aizawa’s eyes widen.
“See, I was right,” Yamada says.
Aizawa ignores him, stepping forwards and saying, “You look awful. We insist on looking after you until you start to recover.”
“No, you don’t need to—”
“We’re doing it,” Yamada says. “End of story.”
And he pushes the door open wider and he and Aizawa walk into his home. Yamada grasps his arm and leads him back to the bedroom, whilst Aizawa wanders off into his kitchen.
“Right, into bed, you,” Yamada says, managing to sound a lot like Recovery Girl.
Confused, All Might gets into bed and Yamada covers him with blankets. Yamada stands at the end of his bed with his arms folded.
“What?” All Might says.
“Nothing. Just wondering why you even got up today when you’re this sick.”
“Because I’m a Hero—”
“I know that,” Yamada says, cutting him off. “But everyone’s allowed a day off.”
“Hizashi’s right,” Aizawa says, entering the room with a large bottle of water and a tray of snacks in his hands. “You should rest when you feel sick, or you’ll end up sick for even longer. So rest. We’ll stay here tonight, and then you’re staying off work until you’re better.”
“And that’s an order,” Yamada says, smiling.
All Might sighs, but he doesn’t argue. He lies back in bed, and it doesn’t take him long to fall asleep.
---
The next morning, All Might still feels awful, but not anywhere like he did yesterday. His fever his broken and his skin no longer burns, and his headache is more of a dull throb than an endless pounding. So he drinks from the bottle of water Aizawa gave him yesterday and climbs out of bed, not feeling like he’ll faint when he stands.
Slowly, with unsteady legs, All Might walks through his home. On his way to the bathroom, he glances into the living room and that is when he sees an adorable sight. Yamada and Aizawa are asleep on the couch, heads resting together with Yamada’s arm around Aizawa’s shoulders. All Might smiles.
Not wanting to wake the guys who have been looking after him, he goes to the bathroom and then goes back to bed, hoping he’ll feel soon.