Izuku Midoriya

"Well, Izuku... It seems you're pregnant."

Sitting in class, the nurse's words ring in his ears. It's been a full week since he was delivered the big news and yet the memory still spikes his anxiety like it was happening all over again.

Izuku had been avoiding Katsuki as much as he could, afraid that the alpha would pick up on something. He had begged Midnight, Recovery Girl, and even All Might not to say a word to his boyfriend about the pregnancy.

He will tell Katsuki himself, just not right now.

"How long until I won't be able to hide it from people?" Izuku had asked, breathless from the confirmation that, indeed, there is a tiny baby growing inside him.

"You mean hide it from Katsuki?"

She knew, of course Midnight knew what he was really afraid of. He was terrified of telling Katsuki. The alpha was top of the class, well on his way to becoming a pro hero and living his dream. A pup will get in the way, this is fucking everything up.

However, in class he manages to smile and chat with his classmates. His boyfriend has become more desperate for his attention and considering the melt down Izuku had last week from when Katsuki was being distant with him, he felt bad for being cold towards him now.

The blond was trying extra hard to get his attention, his normal scowls were less harsh, and he tried to make conversation at lunch with the group. Izuku, feeling bad about his own behavior towards his alpha, relaxed into conversation with the bit of security that he felt from Midnight's previous words.

"An alpha pregnancy will be shorter than others, I would say you are already about 4 weeks pregnant. Another 5 months and you will be giving birth. If you intend to hide this for now, you won't have much time. You scent is already changing; I can smell it because I am an omega as well. Katsuki should be able to smell it right away, but you guys haven't marked each other yet. Izuku, he will find out. Granted, maybe not right now, but he will soon."

He's so fucked.

Izuku had thought about his options, however they all ended the same way. He couldn't bare the idea of giving up his child. He may not want to be having a child this young, but he knows that he already loves the pup growing inside him.

His main worries are his and Katsuki's future and careers.

With All Might on the decline, Izuku was supposed to take over when he retires. Now, with a child in the mix, he is unsure just how well he will do as All Might's replacement. Nevertheless, All Might still has faith in him, saying that he will be able to push through, it will just be tougher now.

Katsuki has been clinging to him for the past hour, his arm almost always kept slung around his shoulder or waist. Every kiss and caress he places on the omega leave him breathless yet petrified that one wrong move and somehow the alpha will find out his secret.

His boyfriend's possessive behaviors only worsen over the next few days and the pregnant omega can feel something is off with his alpha. Katsuki has become quite demanding when it comes to physical affection, both arousing and terrifying him. It would be a lie if he said he wasn't nervous about having sex now that he is 'feeling pregnant'.

Standing in the hallways, Izuku is yanked around a corner and slammed back into the nearest wall. Flinching he instinctively goes to cover his midsection but stops quickly when he sees his handsome alpha peering down at him, his shoulders being pushed back into the wall.

"I need you."

Katsuki's words were low and hoarse, making Izuku's moth go dry and a pool of heat bubble in his lower stomach. Goddess, how he wanted to jump in his arms right now. However, despite his own wishful thinking, he knows that he is a bit nervous about giving into his alpha's cravings right now.

"I can't right now, Kacchan..."

Pushing his palms firmly just slowly on the blond's chest, he tries to wiggle his way out from his alpha's hold. Katsuki seems to tense up but his face falters some and he steps back.

"What's wrong? It's not like you to not want to fuck around at least a few times a week. We haven't done anything in over a week, I can barely kiss you without you pulling away..."

There was something in the way his boyfriend's voice faltered at the end that made him whimper, his omega scolding him for not taking care of his alpha. It's just his mind has been too busy on the small life inside him now, as well as all the lying and secrets he has been telling people.

"I'm sorry, Kacchan... I'm just stressed, you know?"

Once again, lying to his alpha, lying to himself. He was nervous about the league's threats. It has been a few days overdue now. The pro heroes had not given him up, and there had been no public release of his private information yet. It was a waiting game.

But he wasn't focused on that anymore.

"Yeah, the league... They are really bothering you, huh?"

Nodding his head, he steps into the comforting arms of his alpha. Instantly he is wrapped in strong arms, a face is nuzzled into his curls and his own body beings to relax with his sweet caramel scent.

"Thanks' babe..."

There is no more talking, only silence and Katsuki tilts his head up and presses his lips firmly with the other's. Melting into the kiss, Izuku is vaguely aware that they are still in the school building, just neatly tucked away in a dark corner as they deepen their kiss.

A low growl erupts from Katsuki's chest making him lull his head to the side in submission. He knows Katsuki like the back of his hand, the possessive behavior not going unnoticed by the omega.

Katsuki breaks away from the kiss and runs his nose along the lines of his neck, making him stiffen and hold his breath, afraid that the alpha can smell how his body is already changing. However, the blond only moans and licks a stripe up the side of his throat and up to his ear.

Now, Izuku is the one moaning, his arms instinctively going up and around Katsuki's neck, holding himself closer, tighter.

"You smell so good, Izuku. Your scent is so much sweeter today."

The alpha growls approvingly, however these words bring him fear and anxiety. The alpha seems too far gone to even smell the slight distress rolling off his body. What catches Izuku's attention even more is that hard object pressing into his hip, a fierce blush filling his cheeks.

"K-Katsuki... We are at school... You need to stop..."

Whimpering, his knees tremble as his possessive nuzzling and growling continues. It's only when Izuku shoves him back harder that Katsuki seems to break out of his spell. At first, he growls sharply at the omega, almost as if he was in some kind of trance, but once he breaks out, he is blinking and then groaning in frustration.

"Zuku, come on..."

His whines only make the omega smirk and roll his eyes. Trying to calm his own erection, Izuku leans back into the wall and takes a deep breath.

"I don't understand, Izuku. You're avoiding me... a-and I just want to be close to you. The past few days I have been going crazy in my head, just wanting to scent you all the time. I know I am being possessive, but you're mine and I need you."

Stepping forward, he reaches for the blond, knowing damn well what he is feeling is because his instincts are somehow picking up on the fact that he is pregnant now. It scares him, yet he wants to take care of his alpha how he took care of him during his melt down for attention over a month ago.

Ah, yes. The night he got pregnant because he was too desperate for sex to think about a damn condom.

"I'm sorry, Kacchan... You're right, I am being silly..."

He meant it, Izuku knows he is being silly about all this. His alpha wants him, needs his affection and attention. He is stupid for trying to deny the fact that he also misses all the sex they have been having over the last month.

"Come on, let's go back to the dorms."

Izuku's grin can't be helped as he offers up a good time for his alpha. Katsuki's eyes light up making him laugh as he is quickly drug off towards the dorms. When his body wasn't keeping pace with the almost sprinting blond, Katsuki threw him over his shoulder and took off jogging. The whole time, both teens were laughing and spluttering nonsense.

Something about the hungry look in the alpha's eyes as they now stood in the center of Katsuki's dorm room, frantically making out, had Izuku on edge. He was being rougher than normal, and although it was turning him on, his mind once again wonders back to their pup.

Every tight grip and rough shove had him mentally flinching, he knew it was stupid to worry so much, there is no way some rough sex would hurt their pup this early in the pregnancy. However, his body was tense and Katsuki seemed to notice.

The alpha's movements slowed down, but with a struggle. His pupils dilated and frustrated rumbles shook his body. His boyfriend nipped his ear and growled.

"Zuku... I don't mean to scare you... but fuck... I swear it feels like... like I'm rutting..."

His voice was strained and only caused Izuku to shiver as his hand flew down to cover his stomach, although the alpha didn't notice this as strange, it was clear that Katsuki was a bit out of it.

Katsuki had never been in rut before with him, at least not when they were together sexually. The last rut Katsuki had was when they almost had sex towards the beginning of the school year. It frightened him, not knowing what sex with an alpha in rut would be like, no wonder the blond had been so rough and demanding the past few days. It might have not been just the pregnancy.

The low growls from the alpha above him had him widening his eyes a bit, his legs were spread apart with Katsuki's hips pressed firmly to his groin, grinding down against him. It felt good, really good and he wanted this, it just somehow felt wrong when he was keeping secrets from his boyfriend like this.

"Izuku..."

The alpha all but whined, making Izuku shiver before moaning sweetly at how desperate the blond was becoming. His resolve was made as he tilted his head to nibble along Katsuki's jawline.

"Shh, it's okay... I'm yours, alpha."

The moment those words left his mouth, Katsuki's eyes darkened and a low feral growl left his lips, eliciting a keen of arousal from the omega below. There was something so sexy about the way the alpha was preening for him. He knew that an alpha's rut was similar to an omega's heat, uncontrollable need for a mate took over.

He needed to trust Katsuki, even when rutting he knew the alpha would never seriously hurt him. There had been times when Izuku had all but mauled Katsuki's back and arms with scratches and love bites from when he was in heat, yet the alpha had stuck it out and trusted him. He knows that when rutting Katsuki most likely won't be able to speak much, full instinct taking over.

He could do the same.

Hungrily, Katsuki latched his lips to the omega's and began ripping the clothes from his body, the alpha's palms flickering with his quirk, only lightly enough to assist in the half burning, half shredding of his shirt and basketball shorts.

"Holy fuck!"

Izuku squealed in surprise at how quickly his clothes fell from his body. The alpha leaning up enough to pull his own clothes off. Katsuki was lost in his rut, his eyes are a deep red as his now naked body keeled over him. He looks like a god, the omega mewled desperately at the thoughts in his head.

With a sudden movement, Izuku was grabbed by the hips and flipped over, a growl leaving the blond's chest as he felt one rough hand shove between his shoulder blades and the other hand curl fingers into his hip bone, jerking upwards and raising his ass into the air.

Gasping in surprise, Izuku begins to worry knowing that his body is not in heat right now and can't produce slick. He's pregnant, he won't go into heat again until after the birth. Panting, his face flushes with excitement and anxiety, the combination making him painfully hard for his alpha, but his rational side was speaking up.

"Woah, woah, woah, Katsuki!"

Wiggling, his hand jerks back to grab Katsuki's hip, stopping him from his mission, a growl of protest leaves him, but he stops, the trembling starting up again. He knows how much control his alpha has. Pride bubbles up in his chest, he picked a good mate.

Hoping his words don't give anything away, he needs Katsuki to prep him some before just hammering away at his tight hole. Although the thought has his dick leaking, he isn't a fan of that kind of pain.

"Kacchan... I'm not in heat, s-so you need to prep me some... Y-you've got to be gentle for a moment, can you do that for me?"

His words are clear as he tries to break through to his boyfriend. He knows that when he is in heat, he can barely understand what Kacchan is saying to him, yet he always seems to know the real request behind any words spoken.

He knows that something clicked within his alpha as the blond leans down over his back and presses his lips to his spine. His body still shaking but he movements much slowly and organized.

"T-Thank you, alpha."

Moaning from the tender kisses along his spine, he cries out when he feels the blond lick a swipe over his entrance before a finger starts pushing in.

The sting is there, he knows that Katsuki is trying to be gentle for him, but still his movements are much rougher.

Smiling to himself he manages to reach the nightstand and pull out a tube of lube, quickly uncapping it and reaching behind himself to drip some of the cool liquid where he needs it the most. He can't stop the lewd sounds that leaves his body when his alpha's fingers begin shoving the lube into his body, coating his walls and easing the sting.

Pleasure erupts through his veins as Katsuki growls behind him, the deep sounds only causing his own member to pulse with need.

"Oh fuck, yes alpha!"

Right now, this isn't Katsuki Bakugou, right now this is his alpha. He suddenly understands why Katsuki always calls him omega when he is in heat. It's not the same, there is something so right about calling him alpha right now.

Another finger is shoved inside him, bringing back the burn but also shooting pleasure up his spine. Toe curling pleasure that sets his teeth on edge, maybe he is a bit of a masochist after all. The mix of pain and pleasure has him panting and pushing back onto the fingers that are stretching him.

The process lasted maybe 2 minutes before Katsuki ripped his fingers away and knelled up, gripping only onto the flesh of his ass, he felt Katsuki press against his entrance. Bracing himself, he grips into the edge of the mattress right along the headboard and buries his face into the nearest pillow.

Screaming out, his body jerks forward as his alpha slams into him from behind. Perhaps it may hurt quite a bit more than usual, but the pleasure of being used by his alpha during his rut had his toes curling and tears running down his cheeks.

"YES! P-Please alpha!"

His cries falling on deaf ears, he knows the alpha won't understand his words, but only the emotions behind them. He wants more, needs more.

The pounding that his body took was ruthless, the alpha only stopping to turn his omega over or push his body into a new position. He loved it, the feeling of being shoved around and bent to his alpha's will made him cry shamelessly, hot tears rolling over his cheeks and chest as he finds himself releasing several times before his alpha knots him.

After over an hour, Katsuki has knotted him and is surly left bruises in the shape of fingerprints along his hips, thighs, and arms. His hole now leaking his alpha's essence as he barely remains conscious.

The only thing he is focused on is Kacchan. The sleeping blond passed out not moments after his knot deflated, allowing them to pull apart, and although Izuku himself was exhausted, something else was eating at him.

Guilt.

Looking over at his sleeping boyfriend, his one hand weakly flutters over and covers his own stomach, rubbing softly over where he can only assume their pup is growing. After a few silent moments, when he is sure that the alpha is deep asleep, he leans over and presses a soft kiss to Katsuki's lips before softly brushing his damp hair out of his face.

A sad smile pulling at his lips, he manages to take one deep breath before a few tears escape his tired eyes. He speaks quietly to his sleeping boyfriend, knowing he won't hear the words he is uttering, but needing to get them out of his system.

"I'm sorry for not telling you... You're gonna be a daddy, we're gonna be parents... I want to tell you so badly... I'm just a coward and afraid to ruin your life, Kacchan... I love you, so much..."