AU: Omegaverse - 8/31/2019

Buildings were being broken down and people started screaming and running all over the place, bumping into each other. The hero Red Riot started directing people to the nearest exit and closest area for safety. A robotic monster was breaking everything in its path creating a whole knew kind of destruction. The hero, Chargebolt electrified the robot enough for it to fall to the ground. At this time, he had already graduated from U.A and got a better handle on his quirk. Froppy jumped in, quite literally, and used her tongue to fling Kirishima onto the robotic beast. Red Riot used his hardening quirk to break through the robot. Then Kaminari was thrown in the direction of the control panel. He electrocuted the panel making the robot shut down.

Meanwhile, Ground Zero, Uravity, Creati, and Deku were fighting the one who was responsible for everything. This villain's name was Robo (pronounced Row-bow). His quirk: Control anything technological. He can make a robot do anything at his command and hack into computers without needing to be in close distance of it. Some of his body parts were also made of metal, giving him the appearance of a cyborg, which he was very close to being. He wanted everything to be ruled by him. He wanted everyone to be robots at his command.

Ground Zero (Katsuki) was propelling himself with his blasts. He aimed a punch at the villain but the villain dodged only to get kicked in the back sending him flying and into a rock. "WHAT THE HELL DEKU!" Katsuki exclaims as Yaoyorozu creates restraints to get ready to catch the villain. A robot comes out of nowhere and it was rather small and it landed itself right in the middle of an area the pro heroes were at. Uraraka was standing across from Katsuki and Izuku. The machine blew up and sent the pro heroes flying. They got up quickly but not without injuries. Katsuki had a cut on his thigh, and it was pretty big but not deep enough to leave a scar. Uraraka had a burn on her forearm. Izuku had a gash on his peck. Yaoyorozu had a few scratches and scrapes because she wasn't as close to the bomb.

However, the villain Robo was already up and attacking the pros again. They kept fighting and pushing through the pain that they could barely feel. Tsu, Kirishima, and Kaminari show up at the scene to help. Robo was pretty challenging even though having technology at your command was still difficult at the least. Robots came out of every direction and illuminated with a yellow glow. Katsuki's pheromones were the scent of rage and it could easily scare a beta or an omega. Katsuki was an alpha. A strong stubborn alpha. Kaminari, a beta, was a little worried at this point. Beta's were more of the "normal" type. They made up most of the population. Their sense of smell wasn't as good as an omega's or an alpha's but if a scent was strong enough they could smell it. Let's just say that Katsuki's pheromones were really strong right now.

Uraraka was a beta as well and she glanced at the angry and slightly perplexed alpha male. She knew he was mad and she could feel the anger radiate from his body. She had touched some of the robots and they were now levitating in mid air. The robots were fighting each other but most of them made their way to the pros. Yaoyorozu was an alpha female. Lot's of people mistake her for a beta sometimes. She could definitely feel Katsuki's angry energy. She also felt the tension from the others. Everyone baffled and trying to execute an efficient plan. Tsu was a beta but people would mistake her for an alpha. She looked over to Uraraka and admired her from a distance. Uraraka glances at her and smiles reassuringly.

"What's wrong? Can't call yourself pros now can ya'?" Robo states laughing like a maniac and sending robots their way. Izuku kicks them and punches them out of his way. Katsuki breaks them and blows them up with his quirk. Kirishima hardens his whole body and smashes through them all. Tsu picks them up with her 20 meter long tongue and throws them into a rock breaking them. Yaoyorozu made katana's and was currently fighting robots and making her way close to the villain.

Izuku was an omega. Not just any omega, but a rouge omega. He can fight against another alpha's scent. He wasn't like your normal submissive omega. He could dominate if he wanted to. Most people were surprised to learn this information about him. Being a male omega was pretty rare. Being rouge was even more rare which was why villains took an interest in him, and the fact that he was the number one hero didn't help. Izuku activates black whip and blocks the debris that flies towards him. Everyone was fighting hard. Why the hell is this villain so difficult? Izuku thinks. He was getting tired and he felt sweaty and hot under his suit. He payed no attention to that part though because the villain was now hurtling towards him. Izuku was now in on a one on one with the villain.

Izuku landed his punches flawlessly but was then hurtled into a building. As if it were an action movie scene, everyone watched this happen. It was like the universe purposely made them watch their friend and colleague get thrown into a building. Everyone's eyes widen and Katsuki's were the widest. He quickly stared his dark red malicious eyes as the villain. He was going to pay. Katsuki was now in the place Izuku was standing and he could smell the faint smell of distress and fear. It was the damn nerd. Izuku had left a mark without noticing. He tried not to show his fear during battle but for some reason he really couldn't keep it in. It smelled like burnt vanilla and the citrus scent of an orange. It wasn't the worst smell in the world but it would definitely irritate someone, and that someone happen to be Katsuki.

Izuku jumps back into battle giving his friends a thumps up telling them he was "fine". "What's wrong bastard? Scared now that you don't have your precious robots?" Katsuki taunts firing at Robo.

"You will pay!" Robo states and starts to grab out technological weapons he designed himself. Everyone was full on fighting the villain. They were close but Izuku wasn't doing too hot. He felt way too hot. It was also a chilling day so why so much heat? Oh no...

Heat.

This shouldn't be happening! Izuku thinks as some of his scent was becoming more and more potent. Katsuki always compared himself and Izuku and he has had many missions where they team up. Katsuki found common ground with Izuku and would get pissed at him whenever Katsuki was turned on by Izuku. Katsuki and Izuku lived close to each other and would occasionally work out together. One time Izuku went into heat and he couldn't preform his duty as the Symbol Of Peace. He was forced to stay home because if he went out, that would lead to him walking into harms way. Lot's of Alpha's weren't the best people sometimes and would tend to seek out omega's in heat.

Izuku got called in for a mission but because he was in heat he couldn't do anything. He felt terrible mentally and physically. Physically because his body craved the touch of another and mentally because he wanted to help the citizens so badly. He felt like a failure. He told the agency to have Katsuki - "Ground Zero" - to take up his spot. Katsuki was the number two hero. When he got the call he was happy to go beat the shit out of some evil doer but he didn't understand why. He had a day off but they called him. When it was explained that Izuku (Deku) couldn't make it he took note of that. He knew that Izuku would never back down unless it was serious.

So, after the battle that Izuku was originally signed up for, he made his way to Izuku's house. He cared about the shitty nerd but he wasn't about to go announcing this to the world. He wore a hoodie and sunglasses to make himself unknown to anyone at first glance. He wanted to make sure Izuku was okay. There was this one time during their second year at Yuuei, where Izuku had gone through something traumatic. Izuku had had a mental breakdown in front of Katsuki. Izuku was screaming and crying. Katsuki had never seen so much pain in his expression before, not even when he was hard-core bullying him. Katsuki was scared a bit and was worried that Izuku might actually hurt someone, maybe even himself.

Katsuki was the only one there to witness it and they were outside in a deserted area. Izuku kept shouting and Katsuki listened carefully to every word he said. For some reason Katsuki's body moved on its own and he slowly approached Izuku. Izuku was now clenching his hair and sitting on his knees. Katsuki knelt down and brought Izuku in for a hug. Izuku cried so loudly but Katsuki didn't mind. He was used to things being loud and his ear drums were perfect, despite the fact that they probably shouldn't be.

So, Katsuki knocks on Izuku's door and nobody opened the door. He knew Izuku was home so he knocked louder. "Open the damn door, shitty Deku!" Katsuki shouts. He heard a whimper come from inside and instantly his instincts were kicking in. Was someone keeping him trapped? Did someone hurt him? I will break the door down!

"D-don't come i-in..." Izuku stutters his breath breathy. Katsuki didn't understand. He honestly thought a villain had trapped Izuku in his own home. "I... Ah.." Izuku couldn't finish his sentence. He didn't need to. Katsuki — by this point — knew what was happening. Izuku went into heat. Katsuki could now slightly smell Izuku's sweet vanilla and orange scent through the door.

"So, you sent me on your mission because you're in heat." Katsuki says more as a statement than a question. Katsuki was still worried about Izuku though. Before this moment Izuku was complaining about his heat to one of his friends at the agency. Katsuki happen to over hear this conversation just as the friend was leaving. Katsuki asked about it and Izuku was explaining that his heat was late. Katsuki's ears perked up and he looked at Izuku questioning him with his eyes. Katsuki thought Izuku had someone. Like he and someone were together or at least had sex. Katsuki was feeling jealous but he actually did care about the nerd. "Are you pregnant?" Katsuki asks completely calm and almost in a caring subtle way.

Izuku's eyes widen and Izuku shakes his head furiously. "No! My god no! I shouldn't be I'm still a virgin!" Izuku shouts and covers his mouth. Katsuki starts laughing and Izuku states how funny this was even though he himself was a virgin.

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Katsuki's mouth was a little agape and he knew what was happening. Izuku was in heat. He got himself out of the front lines and was a little closer to Izuku. He could definitely smell him now. He saw Izuku looked very scared and confused. Izuku looked like he could cry and Katsuki hated this look on the greenettes face. Izuku kicked some robots back but soon gave out and fell on his knees. Katsuki sprints over to Izuku feeling the need to be near him, but not because of his scent. Katsuki had pretty good control over his biological needs but it was a lot harder when it came to Izuku. "Dammit Deku! Why the hell didn't you take your suppressants?" Katsuki growls out kneeling down.

"I-I d-did! I took t-them!" Izuku says as his breathing becomes more heavy.

"How many did you take?" Katsuki asks glancing around watching the battle go on without the two.

"I t-took two"

"Then why the hell is this happening?!" Katsuki says baffled.

"I-I don't know! Maybe it has something to do with the villain or..." Izuku didn't want to say anything else but then again he was at a lost for words as the need for pleasure came back ten times harder. He whimpers in a needy plea and Katsuki places a hand on Izuku's shoulder bringing him closer to his body. Katsuki starts to release a scent that was meant to be relaxing. It was actually pretty hard for him to do because he wasn't a calm type of person, but for Izuku he could do it. It always seemed natural when it came with Izuku. Izuku breathes it in with hunger. He felt like some of the need for another touch was only being handled a little, but it was enough from keeping him from releasing any more of his scent. It was already becoming harder to control.

Izuku felt dizzy as well and he looked down at his bloody hands. He followed the blood all the way to his chest. His peck was still bleeding, a lot more this time. Katsuki places two fingers to his ear activating the communication device. "Call for Backup! Deku can't fight anymore!" Katsuki says still releasing his scent slowly for the poor omega

"What?! What's going on?" Kirishima responds. Everyone could hear the conversation. "He went into heat! He is also loosing too much blood, he can't be here, it's way too dangerous and it could mess up the battle!" Katsuki explains holding Izuku close blasting a robot back. Katsuki grips him tighter in a protective manner and Izuku was loving it. He wasn't in his right mind but he still had his mind which counted for something. Izuku just now realized how caring Katsuki was being. Why was that?

Then the first wave hits Izuku like a truck and he lets out a moan. Katsuki turns his attention to the pink-flushed rouge omega. Uraraka looks back, most likely from hearing the sound and she nodded to Katsuki letting him know that they had everything under control. Katsuki picks Izuku up bridal style and starts to run from the battle. He really wanted to fight but Izuku mattered more. He brings Izuku behind a building and Katsuki contacts back up as well as medics. Katsuki sits Izuku down and takes his puffy gloves off. Katsuki then proceeds to try and keep the omega awake by talking to him. Izuku was in pain in two areas. But his body was messing with him in ways that he couldn't notice the pain in his chest.

"Deku, stay awake for me! You better not faint on me especially when you're in heat! Being injured like this during heat can make things ten times worse baka!" Katsuki says grabbing Izuku's chin making him face him. He places a hand above Izuku's forehead feeling the heat radiating off of him. Katsuki takes the zipper in front of Izuku's hero suit and unzips it all the way down to his belly button. Katsuki opens the suit a bit and pulls one side down to look at the gash. Katsuki takes out gauze and places it on Izuku's peck. Damn, Izuku was toned! Izuku hisses in pain and Katsuki shushes him softly. "You'll be okay, just stay awake for me..." Katsuki says still smelling the smell of Izuku.

It was hard to control himself but he forced his alpha needs down. He heard sirens in the distance and the silent sounds of battle. Izuku started to cry and Katsuki looks at this and his eyes widen in confusion. "I'm sorry..." Izuku says and Katsuki was still confused.

"What the hell are you apologizing for? You couldn't help that this happened, it's just nature. It's not your fault your in heat, Deku." Katsuki says applying more pressure to the wound.

"I'm such a burden... I'm sorry. I'm so sorry Kacchan... I hate to make you mad and you're the one who had to help me," Izuku says and Katsuki was still confused but he listened to the boy. "I-I just don't know what to do. My body rejected the suppressants! T-that never happens! I, ah~"

Katsuki didn't know what to do but he sat next to Izuku keeping the blood soaked gauze on his wound. "You aren't a burden! Don't say dumb shit like that, it's not true. You are the number one hero, dammit! How could you think this stuff?" Katsuki roars.

"I don't have a mate..." Izuku admits and Katsuki thinks: Is this the reason he's acting so weird? "I just n-need someone..."

"That's biology talking" Katsuki states hearing the sirens grow louder. "Maybe it is but I'm allowing you to kill me after I do this..." Izuku says and Katsuki's eyes furrow and he looks up at Izuku only to feel a pair of soft, slightly wet lips against his own. Katsuki didn't pull away. Izuku's scent was already pretty strong and it was only making Katsuki want more of him. Izuku pulls away as he was panting hard. He was nervous and scared of what Katsuki could possibly do after he asserted dominance.

Katsuki must have smelled his fear a bit and he did the only thing he really wanted to do. Kiss him. He lifted Izuku's chin and he faced him. Katsuki leaned in and softly kissed Izuku. It was warm and fuzzy. Yeah, sure, the two have already had their "first kisses" with someone else, but this was more special. Their first kiss with each other was beyond any other. The kiss was becoming more passionate and heated. Katsuki pulled away but Izuku clearly didn't want that. "Deku, we can't... You're in heat and you are hurt. Being in heat can make injuries worse. The ambulance is almost here..." Katsuki says.

"We defeated the villain! Are you and Deku still okay?" Uraraka says suddenly, her voice banging through the earpiece. Katsuki places two fingers to his earpiece before speaking.

"Yeah! We're fine, but Deku lost a lot of blood and his heat isn't helping either..." Katsuki says looking at Izuku who seemed to be extremely pink and uncomfortable. He kept shifting and squirming trying to get rid of the aching pain of arousal.

"There should be an ambulance heading your way"

"Yeah, I hear it." Katsuki states. Izuku's heat was getting visibly worse and his smell was everywhere. He didn't want anyone touching him or hurting him. Katsuki gets mad at the thought and he could smell other alphas in the area. Shit. Katsuki brings Izuku close to him that there bodies were touching. Izuku was shaking and his scent started growing stronger. The need for someone. The need for him. Katsuki rubbed his cheek against Izuku's softly and kissed his neck gently. Katsuki takes Izuku's hand and places his wrist on Izuku's. He rubs them together releasing his scent. Izuku moans softly in Katsuki's ear and Katsuki takes in every little breath he makes.

Katsuki was scenting Izuku to keep him at bay. Izuku's scent was now mixed with Katsuki's and he smelled a bit like him too. Izuku felt a little better but he wasn't in the best condition. Katsuki started nipping at Izuku's neck causing Izuku to mewl quietly. Katsuki's big canine teeth graze over Izuku's sensitive scent gland and Izuku shivers and exhales a satisfied breath. "Thank you..." Izuku speaks gratefully. Katsuki had saved him. The sound of paramedics came running their way and Katsuki lifted Izuku and carried him onto a gurney. Katsuki explained the situation and they were both treated.

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Izuku was sent to a special room for when an omega was in heat or when an alpha went into rut. No one was allowed to visit Izuku because when an omega is in heat they can't control their scent. Katsuki however, didn't take no as an answer. He had scented Izuku and if he was away too long that could be dangerous. Katsuki found his way into the room and Izuku was awake. Izuku had tears in his eyes and reached his hands out like a child who wanted to be picked up.

Katsuki waltzes over to Izuku and hugs him tightly. Katsuki rubs their scent glands together and Izuku buries his nose in Katsuki's neck. He takes a deep breath in and a satisfied exhale. It was almost like they forgot all their past arguments and fights. "Deku..." Katsuki starts and Izuku doesn't break the hug. He just closes his eyes and hums to let Katsuki continue. "I know this is because you're in heat but-" Katsuki was soon cut off.

"No..." Izuku starts. "It's not because - well it is part of my heat but... Me... Kissing you... That was real. That wasn't just because of my heat. I honestly like you. A lot. I love you even... I-I just know you think I-I'm g-gross or s-something-" Izuku starts to cry and Katsuki pulls away kissing Izuku. Izuku closes his eyes enjoying the sensation of their mouths colliding. He didn't really know how to kiss but he just let his body take over.

Katsuki broke the kiss and looked into Izuku's eyes, "Deku. You didn't let me finish! But now that I know this information... I want you to be mine."

Izuku's eyebrows furrow and he tilts his head in confusion. "Huh?" Izuku says as if he didn't hear Katsuki correctly.

"I want you to be my mate. If you want to of course... I'm not going to force you do do anything you don't want to, that's just a dick move."

"Yes..." Izuku starts. Katsuki smiles and lets all his walls break down gradually. "I will be your mate!"