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“Oh my God, Kacchan, I think you’re getting your first heat,” Izuku said as he touched Katsuki’s forehead with the back of his hand.
“Hah?”
“It just makes so much sense!” Izuku exclaimed, taking Katsuki’s warm hands in his and making himself comfortable on the couch beside him.
“You’re burning up, you’re light-headed, your eyes are half-lidded…”
“Izuku, I have a fucking feve—”
“You’ve always liked my smell! Actually, sometimes I think you might even have a bit of a hyperfixation with it, to be honest…”
“Hey! You ungrateful prick, I thought you liked it,” Katsuki whined as he shoved him, his cheeks flushed.
“I do! Oh my God, Kacchan, of course I do! An alpha is the happiest when his omega likes his scent, you know?”
“Oh my god, shut up, you fucking weirdo.”
Izuku snuggled closer, viruses be damned. Katsuki couldn’t deny he was a little bit endeared by his antics and his not-so-hidden resolve at making him laugh despite this horrible flu.
“And besides, why do I have to be the omega?” Katsuki asked, crossing his arms as challengingly as his sickness allowed. He was well aware he must’ve looked like a pouty, little sick cat.
“Kacchan…” Izuku blushed as he scratched the back of his neck.
“Kacchan what?!”
“You haven’t topped in months…”
“Fuck you!” Katsuki grabbed a pillow and kicked him with it, an involuntary smirk tugging at his lips.
“That’s precisely what you haven’t been doing!”
They both snorted at that, cheeks hurting from the stupidity of it all.
“You’re so fucking stupid, I swear to God,” Katsuki said, with much more softness and fondness than he was aiming for.
He was feeling weaker than usual, okay? Give him a break!
“And also! You being an omega would explain your sweet scent! Kacchan, don’t you see it too? It’s crazy that I haven’t thought of it sooner!” Izuku kept up his charade.
“I’m going to fucking murder you if you don’t stop this shit right now,” Katsuki threatened, knowing that Izuku knew his warning was short-lived. But he couldn’t let this buffoonery go down with a bit of scolding, could he?
“Don’t worry, Kacchan, I’ll take care of you,” Izuku said, solemnly taking Katsuki’s sweaty hand in his. “I might not be the best at cooking, but I can be a good provider for my omega, you just wait.”
“Is that right? And how will you do that?”
“Well, first of all, I have no problem with knotting you right this very moment if that’s what you nee—“
“Okay, that’s enough, get out of here,” Katsuki pushed him off the sofa, his ass falling on the floor.
“But I love you, omega! You know fighting against your second gender will only make it worse! Let me take care of you, let me scent you!”
“Be a good alpha and bring me some water and aspirins, would you?” Katsuki decided to finally entertain his silly boyfriend, shoving him away with his foot.
“Yes, my omega!” Izuku shouted as he comically stood up from the floor.
Before running to the kitchen, he stopped to peck Katsuki’s forehead. “You feeling a little better, love?” he asked quietly, a hint of seriousness seeping through.
“Yeah, nerd, don’t worry,” Katsuki reassured him, leaning into his touch. “Now go, your omega is in heat, remember?” he teased, pinching Izuku’s ass in the process.
“Oh my God, yes! Wait here and control your pheromones, Kacchan. I’ll be right back!”