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Katsuki is an awfully possessive omega. No one, NO ONE is allowed to touch her Deku.
“Um, Kacchan, no one is touching me right now, so why are you growling?” Deku sweats as she looks at her girlfriend’s face that is contorted in a frown, small growls leaving her as her lips twitch to snarl.
It’s true that omegas are generally meek and demure, and that alphas are mostly dominant and territorial.
(As for betas… Sadly, no one really cares about them)
Deku fits the norm. She’s usually described as friendly and helpful with a cute personality, always wearing a sunny smile that melts away even the iciest of hearts.
Just like a proper omega.
(Other than that one time where she almost flew at a random beta trying to scent Kacchan, but hey, we don’t talk about that day!)
Now, Katsuki on the other hand…
“I can’t believe that fucking knothead is /looking/ at you! Can’t he see you’re clealy taken?!”
Well, let’s say that Katsuki isn’t like other omegas. Cliche, yes, but it’s true.
She’s always been a firecracker, ever since she was just a pup. Born to be a leader, her commanding nature and imposing stance naturally earned her other people’s respect.
Everyone swore by their grandma that she was going to present as an alpha; even Katsuki herself believed it.
It was so clear… But things don’t always go as planned.
Katsuki remembers the feeling of it as it began, but the pains that signaled the coming of her presentation didn’t feel how the school and her parents had told her they would.
She didn’t experience the ache in her gums that indicated an alpha’s fangs growing out, or the heightened sense of smell, or even the alphan need to claim.
Instead, she felt cramps in her lower belly and a burning like hellfire igniting inside of her.
The pain was so strong that it had Katsuki hissing and whimpering in agony. It rattled her bones in the sick, twisted way only the cursed omegan nature could provide, until she doubled down and fell to the ground trying to breathe through it.
To make the whole experience worse, it happened in the middle of the school patio at recess, so every student and janitor and teacher that was nearby saw and knew that the strong and amazing Katsuki Bakugou was an /omega/.
It was utterly humiliating, being subjected to that. She would certainly become the school’s gossip topic. Katsuki could already hear their snickering and the itching desire spread their stupid opinions around.
’The great Katsuki Bakugou, a weak, insignificant omega. Never to make her extraordinary dreams come true.’
Instead, she would be shackled by society’s expectation of omegas as submissive little housewives and baby makers.
‘Such a shame, all that potential wasted.’
Her blood boiled even more at that. Bastards. If she had any strength left to move or speak, she’d cuss them out like never before.
But, even then, in Katsuki’s state of almost unberable physical pain and absolute mental distress, Deku was there for her.
When she looked up at Deku, the girl stood slightly bent in front of her with an outstretched hand. In that moment, Katsuki wanted nothing more than to smack her away for daring to pity her, until her gaze fully locked into her friend’s green, captivating eyes. Katsuki finally recognized the meaning of that look. It was not pity. It was understanding. /Deku was not judging her./
So, instead of reacting with violence as she normally would and slap Deku’s hand away or even scream at her, Katsuki took the offered hand and stood up.
“Let’s get you to the infirmary, Kacchan.”
Katsuki didn’t even respond, simply following after Deku without a word as she led the way to the nurse’s office, her soft voice, small only for Katsuki’s ears to hear then, still ringing like fairy bells inside Katsuki’s head.
Since when did shitty Deku’s voice have such a nice tone?! Presenting as an omega surely might have dealt some damage to Katsuki’s brain.
She grumbled as Deku pulled her around the hallways by the hand, happily prattling about something that Katsuki was too busy blushing like a crushing schoolgirl (which she clearly was, honestly) to pay attention to.
After that event, Katsuki and Deku became impossibly closer. The blonde finally took her head out of her ass and sincerely apologized for all the times she had hurt Deku, mentally or physically, throughout all their history since knowing each other since childhood.
Deku, bless her soul, just smiled and thanked her for her words, accepting Katsuki’s expression of regret, and even apologized for her own mistakes. Katsuki, in her typical fashion, scoffed and rolled her eyes. Deku had nothing to apologize for. Deku simply laughed and squeezed Katsuki’s hands.
Katsuki wanted to cry at the sheer /adoration/ sparkling inside Deku’s beautiful green eyes whenever she looked at her. Her traitorous brain would tell her that she wasn’t deserving of such emotions. But then, Deku’s words of encouragement and affection and every positive word that she ever directed at Katsuki would come crashing back inside her mind and knock those awful thoughts away. And everytime, with renewed determination, Katsuki quietly vowed to do everything in her power to always keep that look alive.
So that’s how they came to be. Two omegas in love, inseparable. Everyone knew to stay away, but some bold and entitled assholes still underestimated Katsuki’s abrasive behavior just because she had presented as an omega.
Fools. She made good work on putting them back in their places, though.
After she finishes dealing with another dumb alpha that thought he had a chance with Deku, Katsuki returns to her girlfriend’s side with a satisfied grin. No one will ever take Deku away from her, she’ll make sure of it as long as she lives.
Her heart soars at Deku’s warm, completely enamored gaze.
’My Deku. Every single part of her, in and out, down to the last cell. All of it, all of her. Mine.’
Katsuki couldn’t be happier. She kisses her girlfriend to make a point to all of the extras that have their attention on them.
Deku is hers.