bnha 285 spoilers, #BKDK sad a/b/o thread. mostly sfw.

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katsuki's never really cared about his own dynamic, and frankly, he hasn't even actually presented yet. deku presented as an alpha at the start of the year, and it was intriguing, but ultimately -- katsuki doesn't care. +

nothing will stop his quest to be #1, not second genders, classifications, nothing. he'd prefer to be an alpha but for now, he'll put it out of mind.

... that is, until he wakes up in a hospital bed after taking a blow for deku. thankfully, he's alive. +

scarred, but alive, and not permanently disabled or quirkless. that's more than he could ever hope for. until the doctor tells him that he was pierced through his womb, and that it's permanently damaged. +

yes, his womb, because he's an omega that hasn't presented yet and now will never reproduce.

the thought is overwhelming, but katsuki shoves it aside. he never wanted to be an omega, but now maybe he's a little upset that he won't be able to be one, in that traditional sense. +

but, whatever, he thinks, now at least he doesn't have to worry about kids, or heats, or whatever.

and somehow, miraculously, at 17 (an extraordinarily late bloomer), he gets his first heat. it's terrifying and abnormally painful, and his scar throbs as the heat begins. +

deku finds him curled into bed, a complete wreck, and they spend the heat together, bodies one on top of each other. the pain abates as deku kisses him down the cavity of his chest to the scar marring his womb. +

they get together. graduate, become a duo, get married. and katsuki never tells him, really, that he was permanently injured when he took that blow for him all those years ago. +

but now he's 34, and he wakes up to a cold bed as deku's in the shower, and he's hit with a sharp and painful yearning. he wants children. he's wanted them for quite some time now, but it's only in that moment that he realizes. +

he doesn't tell deku, but at a get together, kirishima mentions his kid, and katsuki makes an imperceptible expression that deku picks up on. in the car on the way home, deku breaks the silence.

"can't believe kirishima already had kids," he says. "it feels like it was just yesterday that we graduated."

katsuki is quiet for a moment. "yeah, it's weird as hell."

deku pauses, his eyes on the road. "kacchan... do you want children?" +

katsuki swallows, and shakes his head. "we're too busy for that."

"we can make time."

the secret spills almost involuntarily. "i can't have them."

"i won't push if you don't want me to." +

"no, i mean like, i CAN'T have them. my body's too damaged -- from when afo stabbed me, all the way back then. so, yeah, even if both of us wanted kids and i spent every day for the rest of my life praying on my fucking knees, i can't have any." +

deku places his hand on kacchan's lap. "i know."

katsuki looks at him in shock. "i never told you." +

"you never had to." deku's eyes still stare straight ahead, lost in thought. "kacchan, your heats were painful from the beginning. it's just... i knew. and i didn't care, and i still don't. it changed nothing for me." +

katsuki's tongue feels thick. "so, what, then why would you even ask if i wanted kids?" +

deku finally looks over to him. "i don't know. but you looked so upset back there. and we can always adopt." deku glances down to his abdomen. "besides," he murmurs, "it's my fault you got injured." +

katsuki grips deku's hand painfully tight. "don't you dare say that. it was never your fault."

deku hesitates, and nods silently. +

katsuki's grip slackens, and he lets deku's hand envelope his. "what i did back then... i'd do it again in a heartbeat." he meets deku's eyes. "don't ever forget that."

--
come april, there are two new voices in their home.

okay yeah, end of thread. weird confession: not actually a huge fan of a/b/o, man, but... i couldn't get this idea out of my head.