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He very well may have been the first trans guy on the face of the planet to be completely crushed as another 28 days went by with no sign of his period.
Katsuki stopped taking his hormones four months ago, as well as his birth control. His useless alpha was being stubborn about claiming him, and he was done fucking around. Without his birth control, he could get pregnant even while taking testosterone, but it improved his chances to go cold turkey. In the absence of both, his ovaries should kickstart again, but he’d seen no sign that was the case.
He’d gone into heat only a few weeks after he stopped, so he wasn’t expecting results from that instance. It was probably too soon. Given that he went into heat every four months, he did anticipate having at least one period in the meantime. But now his heat was only another 28 days away, and he was losing hope that he’d ovulate before it.
His goal had been to surprise Izuku with the pregnancy. And, sure, maybe he was trying to rush the alpha into more commitment, but they’d been sleeping together for over a year and he had no claim to show for it, no ring on his finger, nothing. After knowing someone for over two decades, he didn’t see the issue with a shotgun wedding. No one would stick their nose up at the two of them tying the knot too quickly, not after everything they’d been through together.
Was it a little underhanded? Sure. Was it wrong? Definitely. But he felt like he was fucking wilting every time a heat passed with no mark and no permanent bond in place. He and Izuku knew each other better than anyone, they were already so in tune with one another. Sometimes Izuku even noticed his needs before he did, like if he was hungry or tired, or wanted to be scented.
Of course, sometimes they were out of tune on the big things. Like Izuku’s apparent commitment issues. He wasn’t going to beg for his alpha to claim him like some simpering little minx in a porno. Katsuki had been very clear to Izuku that he was expecting the alpha to court him properly after his infuriating refusal to join Katsuki’s agency as his partner. With that mess cleaned up and Izuku signed on to work part time out of the Bakugou Hero Agency, it had become clear that Izuku basically required a powerpoint presentation on self-worth any time Katsuki suggested something that would make him happy.
He knew a baby would make him ecstatic. That a claim would help him relax, make him feel like Katsuki wouldn’t slip through his fingers and find someone better. (There was no one better.) Rings on their fingers would be the icing on the cake, a visible reminder to accompany the bite Katsuki would wear, a reminder that Izuku could look at even when they were apart. Everything he was doing was for Izuku’s own good.
But his body wasn’t cooperating. What if he just couldn’t have kids? Male omegas had plenty of testosterone floating around, and they had them just fine. Theoretically, he didn’t even need to stop HRT to have kids, he was just being cautious. So stopping his birth control should have made him start regular periods again, letting him know that his body was cycling the way it should and preparing his uterus to provide for a baby.
The absence of even the smallest amount of discharge could only mean that his womb was totally barren. Nothing whatsoever was happening in there to prepare for a pregnancy. And sure, it could take AFAB betas who had been taking testosterone as long as he had up to five months for their periods to start again after stopping it, but he was an omega. On average, they’d see something within a month, sometimes a month and a half. His doctor had assured him it should be no more than three, and to come back to the office if he didn’t notice a change so that they could discuss fertility testing and other options.
Well, here he was three months in with no sign that he was ovulating again. Guess he had a call to make.
He popped another pill out of the blister pack for his birth control. This would normally be the part where he washed it down the sink, but today he hesitated. Katsuki had kept up with picking up his prescription from the pharmacy and consistently flushing it, just in case Izuku got nosy. But why even bother with the stupid ritual any more?
The thought of what the doctor might say about his fertility, what his results would be, scared him. And he couldn’t tell Izuku anything, couldn’t confide his fears, because he was already doing something he wasn’t supposed to.
What was wrong with him, that Izuku was so resistant? Everything he knew about alphas told him that they were beasts, that an omega in heat fried their little brains and made them want nothing more than to claim and breed. Yet he’d spent several heats now without Izuku so much as kissing the back of his neck while they mated. Was the idea really so unappealing?
He belatedly realized that he was crying. Fuck, his hormones and emotions had really been all over the place since he’d stopped taking his medication. Warnings had been given to him by his doctor before he stopped, but he hadn’t thought it would be this bad.
The sadness curdled into anger, anger at his body for not working right, for making him feel so weepy and shit without a baby to show for it. He crunched what remained of the pack into his fist and blew it up. He didn’t care anymore.
“Fucking useless pills!” he yelled, hurling them into the toilet. The pack floated on the surface, singed and smoking, reeking of melted plastic, and the smell was so bad he wanted to hurl.
Rubbing the tears from his eyes, he turned to find that Izuku was frozen in the middle of their bedroom. Fuck, how much of that had he just seen? Why was he home early?
A moment passed, then Izuku was throwing his briefcase to the floor and dropping into dogeza.
“Please forgive me, I just couldn’t stand the thought of you leaving me.”
What the fuck—
“I realized what a terrible mistake I’d made once your last heat was over. I was insecure, and stupid… and I used poor judgement. I swear I was going to put the right pills back before your next heat.”
“My last heat… my pills…?” Had Izuku—had he replaced the birth control he wasn’t even fucking taking?
“I know it’s too late, that you’re already pregnant. Just… Please don’t punish our baby because of my actions.”
The visit to the OBGYN, which he'd entered into their shared calendar without a second thought. Did Izuku think he was trying to… to take care of it without him knowing? Had he rushed home to confess, to intervene?
Whatever his plan had been, the sight of Katsuki destroying his birth control must have signaled to him that he’d discovered they were fake.
Izuku was totally mistaken, though. There was nothing to even take care of. He wasn’t pregnant. Couldn’t be. He hadn’t gotten his period, and the timing wasn’t right for his last heat—
His last heat. Izuku had made a mistake before his last heat.
“I’m pregnant?”
Izuku peered up from the wood paneling of their bedroom floor. “You… you weren’t sure yet?”
Katsuki sank to the ground, stunned. He’d gone off his birth control before his last heat, expecting to get pregnant during the next one. Despite having a monthly period, omegas would only conceive during a heat. But if Izuku had replaced his pills even before he’d started flushing them…
“You fucking asshole,” he whispered. All this time, he’d thought it was his fault. That his body wasn’t working right. But a pregnancy explained it all. Of course he hadn’t gotten his period, there was no unfertilized egg to evict.
“I’m a coward,” Izuku said. “Even after all this time, you’ve never asked me to claim you. It was just—it was the easiest way to make sure you would stay. I didn’t want to claim you without your permission, because you would hate me. I thought, maybe a baby… But I should have trusted you, it should have been enough for me. Your love is enough for me. I’m sorry. If I could do it all over—”
“I haven’t been taking my pills.”
“... Huh?”
“I stopped taking my birth control four months ago. Testosterone too. I only called for an appointment because my period still hasn’t happened, and I’m trying to get pregnant.”
Izuku slowly lifted himself from dogeza, his face awestruck. Great, now they were both on the same page. And the alpha was lucky he hadn’t turned him into a blackened smear on their bedroom floor, if only because Katsuki had the same fucking shitty idea at the same exact time that Izuku did.
He and Izuku knew each other better than anyone. Even without a bond, it often felt like their feelings were one in the same. The extent to which that had been true in this instance should have had him hightailing it back to his parents and scheduling with the clinic to terminate his maybe-pregnancy.
Should have.
Because this actually felt like the best day of his fucking life.
“Kacchan, you stopped—”
“Am I really pregnant?” he asked, voice strained. Katsuki didn’t want to get his hopes up, but Izuku had sounded so sure…
“I don’t know for sure,” Izuku said. “But… you want to be?”
“You’re so stupid,” Katsuki said, crawling across the floor toward him. Rearing back, he slugged Izuku across the face, hard.
“That’s for messing with my medication,” he said, grabbing fistfuls of the stupid suit he wore when teaching. “And this is for trying to knock me up.”
Hauling Izuku close, he kissed the daylights out of him, moaning into his mouth when Izuku grabbed his ass and lifted him into his lap.
“I meant what I said—” Izuku started, kissing along his jaw. Katsuki caught his lips again, licking into his mouth and biting his lip harshly to silence him.
“I’m not going to beg you to claim me,” Katsuki declared. “If that’s what you want, fucking do it, alpha.”
Izuku’s upper lip pulled back in a snarl, and then the world flipped. He was thrown onto the mattress, a hand on his nape shoving his face into the bedsheets. Behind him, he could hear Izuku undoing his pants with one hand, and he yelped as his underwear was grabbed and literally torn off him.
“Is this what you wanted?” His tone sent an anticipatory shiver up Katsuki's spine. Oh, he was about to be fucked. The familiar heat of Izuku’s cock was gliding through his folds, wetting itself in the slick that had bubbled out of him at the alpha’s manhandling. “You wanted me to take you? Hold you down and put a baby in your belly, so that everyone knows what I did to you?”
He flushed, embarrassed. “I—you—Izuku…”
“You want me to claim what’s mine, right? Okay, Kacchan. I think I’m finally ready.”
His thick cock popped past the resistance from his tight hole, then easily sank in until he was balls deep. Katsuki whimpered, pushing back to fuck himself on that fat dick until Izuku snarled, the grip on his neck tightening in warning. He felt himself gush.
“Hold still—I’m fucking you. This pussy belongs to me, you belong to me.” Izuku released his neck, pulling him up with an arm around his chest until Katsuki was sitting in his lap with Izuku’s cock lodged deep, protruding from the flat plane of his stomach. It put Izuku’s teeth right at his nape, and his body trembled at the feeling of Izuku’s hot breath against the sensitive area.
“Do you know why I’ve never come this close to your mating gland?” he asked, palm moving over Katsuki’s tummy to rub where the head of his cock was distending it.
“It… doesn’t do anything for you,” he guessed. That’s what he’d always assumed, at least. The prospect of Izuku claiming him turned him on to no end, but Izuku had never seemed interested in the subject.
“No, Kacchan. It’s because I—I can barely fucking control myself right now.” His voice was hushed, and a little strained, but a happy purr was rumbling in his chest. Katsuki was already instinctively answering with a vibration of his own, content and encouraging. “You smell so good… Please—need you to say I can. Need to know that you want this as badly as I do.”
Izuku. Once a nerd, always a damn nerd. Wasn’t it obvious by now?
“Breed me,” he whispered, rocking on the thick length stretching him open. The words were easier like this, with Izuku already drooling venom onto his nape. It felt less like begging, and more like he was letting Izuku loose. “Claim me.”
Sure, they’d taken the long way around, complete with more misunderstandings and apologies, but that was kind of their thing at this point. This moment was what he’d wanted all along, so how could he not be delighted?
When Izuku’s fangs sank into his neck, he laughed.