Bakudeku/Dekubaku Oneshots

Going Feral

Omegaverse
Omega Midoriya Izuku
Alpha Bakugou Katsuki
Short Chapter

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<Katsuki POV>

Ridiculous.

Absolutely ridiculous.

That’s the only word that came to mind as I sat in my dorm room—Class 3-A, to be exact. It's been two years since the war with the villains ended. Two damn years since we faced off against Shigaraki, All For One, and the rest of their twisted League. I'm not usually one to dwell on emotions, but I’d be lying if I said I wasn’t grateful. Grateful we made it out. Grateful most of us are still alive.

I’ve changed.

Hell, I’ve changed more than I thought possible.

Gone is the explosive, short-tempered first-year who barked at everything and everyone. These days, I’m… softer. Not weak—never weak—but calmer. And the reason for that shift? The person currently curled up in my lap like he owns the damn world.

Midoriya Izuku.

My mate. My Omega. My everything.

Yeah, that nerd ended up with me. Wild, right?

We’ve been through hell and back—physically, emotionally, you name it—and he’s never once wavered. He’s been there when I broke down, when I lashed out, and when I didn't even know how to say “thank you.” He’s stood beside me through it all. And now, he’s mine.

And I’m his.

Literally.

We’ve marked each other. My scent gland bears his bite, and his neck holds mine. It’s not common for Omegas to return the mark, but Izuku? He’s always been different. He said it helped him feel secure—made him feel like I wouldn’t be taken away from him.

“Because you’re mine, Kacchan. And no one else gets to have you,” he’d told me with those big, teary green eyes that turned into smoldering emerald fire when he got all possessive.

Izuku’s always had a bit of a jealous streak. If someone stood too close to me, his eyes would narrow dangerously, like he was ready to fight them on the spot. His aura would spike, and anyone with a brain would immediately back off. Afterward, he’d cling to me like a vine—scenting me, rubbing his wrists on my chest, cheeks, and sometimes even licking my scent gland until it left me shivering.

Honestly? It was kind of hot.

But today? Today was something else entirely.

Right now, I’m sitting cross-legged on my bed, back against the wall, while Izuku straddles my lap. His face is buried against my neck, mouth busily kissing, licking, and gently sucking at my scent gland. He’s making soft, content chirping noises—typical of a deeply satisfied, bonded Omega.

But this isn’t just Izuku being clingy.

He got hit with a quirk earlier during patrol. Something called Feral—real original. It triggers intense instinctual behaviors, pushing the affected person into a hyper-instinctive state. Since Izuku is mated, the quirk made him run straight to me the moment it activated.

I wasn’t with him during patrol. It was my day off.

According to Aizawa-sensei, the quirk would wear off in about three days, but until then, Izuku would be… well, feral. Intensely bonded. Borderline yandere, if you ask me. And because of that, Sensei gave us a three-day break from school to avoid any potential “incidents.”

So here we are.

Izuku is practically vibrating on top of me. His nails dig into my back, hips subtly grinding against mine. His chirps deepen, his scent growing richer, more demanding. And then, without warning, he bites down—right on the mark he gave me.

I stifle a groan. Pleasure sparks down my spine, and I automatically wrap my arms around him. One hand tangles in his hair, the other runs soothingly up and down his back. He responds by pressing closer, rubbing our necks together, his body moving with a growing desperation.

Then he speaks. His voice is guttural, breathless, full of need.

“Alpha. Breed. Need. Knot. Alpha.”

That wasn’t Izuku talking.

That was his Omega.

The primal, instinctual part of him that demanded satisfaction—demanded me.

And who am I to deny my Omega?

I lean in, pressing a kiss to his temple as I whisper, “Don’t worry, baby. I’ve got you.”

The room is silent aside from our breaths and the occasional chirp from Izuku. I shift us onto the bed properly, laying him down gently as he clings to me with feverish urgency.

Three days.

That’s how long this quirk lasts.

By the time it’s over, Izuku probably won’t be able to walk straight for a week. But that’s a problem for future us.

Right now? I’ve got an Omega to take care of.

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Later That Night

The moonlight streamed through the half-open curtains, casting silver rays across Izuku’s flushed cheeks. He had finally fallen asleep—exhausted and tangled in the sheets, his body curled against mine like he never wanted to let go.

I watched him, fingers absentmindedly brushing the green curls away from his face. His cheeks were still tinged with red, but his breathing was peaceful now. No more whining, no more begging—just peace.

I couldn’t help the soft smile tugging at my lips.

No one ever told me that being someone’s Alpha could feel like this. Like I was tethered to something real. Something worth protecting. Worth everything.

I didn’t say it often, but I loved him.

More than anything.

And once this quirk passed, once the frenzy settled—we’d still be here.

Together.

Always.

THE END