Izuku woke up from his slumber from another painful churn in his abdomen and doubled over off the couch as he hugged himself. He didn't hear katsukis call for his name, the pain was too strong for him to focus on anything else before he grabbed the decorative bowl that sat on the large coffee table and dumped all of the content inside before filling it with his stomach acid.

Katsuki immediately turned off the stove when he heard clanking coming from the common room and then Izuku's gags and rushed over to him and saw him pucking, but not in the bowl he left him earlier and instead in the room decor but it was fine. He could wash it... or throw it away. It was ugly anyway.

"I'm here, i'm here," Katsuki muttered as he made his way towards the boy, his instincts starting to take over when he could smell Izuku's distress. He made his way behind Izuku and sat on the couch while leaning over and wanting to do something to help but could only place his hands on Izuku's shoulders and release his own calming scent to soothe him, even if it's just a little.

"God it hurts" Izuku said, his voice cracking as he spit into the bowl where there was nothing but his stomach acid since he threw up his breakfast an hour ago. he whined in pain and he curled into himself before he felt something wet against his mouth, making him look up to see Katsuki holding a wet rag to his mouth.

Izuku took the rag and wiped his mouth, even though there was almost nothing there, before clutching his stomach again and leaning back against the couch, not being able to process anything but the pain inside of himself and he started crying again when he remembered why he was feeling pain in the first place.

Katsuki only watched in pain, wanting and having the strong need to console Izuku so he slowly made his way down onto the floor, his legs sliding on either side of Izuku's build until he was seated right behind him. He hesitated as he brought his hands around the boy. He was now simply listening to whatever his instincts were telling him to do and it seemed to work because Izuku immediately relaxed under him and scooted back until his chest and belly were pressing against Izuku's back. He could see, and hear, Izuku's pain since his hand was placed where his stomach was as well as the distress pheromones sometimes overlapping Katsukis soothing ones.

Izuku then felt something slide under his hand where his stomach was and looked down, noticing Katsukis hand there while the other was rubbing his side.

"K-kacchan?"

"Shhh '' Katsuki said as he hugged the male in front of him, sneaking a little whiff of Izuku's scent when it started turning sweet again.

Izuku relaxed, starting to feel weird when he still felt pain but something made him relax and give into Katsukis alluring scent. He leaned back, his movements not being processed inside his brain, before he furrowed his brow when he could really smell Katsukis scent.

Of course it smelled of caramel but it was more natural then the one that came from his nitroglycerin. It was like the carmel was being made since the air around him was warm and... comforting.

"Is that you?" Izuku questioned, his throat a little scratchy from the acidic feeling from his puking.

"You mean my scent?'' Katsuki questioned, receiving a nod from the other.

"Yea" Katsuki said before he helped Izuku up to guide him towards the table to sit him down before going over to go get the soup that he was cooking earlier and brought the whole pot to the table, not after throwing the puke-bowl away in the trash. Izuku can feed himself.

After the two situated, Izuku eyed the soup for a while, wanting to have a feel of if he's just going to throw it back up but his stomach grumbled, making him wince a little from the other painful feeling below it.

"So, you're an Omega?" Katsuki questioned stupidly as he tried starting a conversation.

"Dominant Omega. That's what the recovery girl said because I started developing earlier than intended." izuku answered as he started playing with the liquid.

"I-... It's not that I don't like being an omega. I'm ok with it and all but..." izuku said, understanding how bad it might sound from his crying and shouting earlier in the infirmary room.

"You're scared about it affecting your progress in One For All?" Katsuki questioned, finishing the Izuku question. Izuku nodded his head before deciding to take a spoon-full of the soup.

"When did you know that I was going to be an Omega?" Izuku asked as he peeked up at Katsuki, seeing his thoughtful expression.

"When I actually knew, it was when I stayed in the class with you and you gave me your food, but then again, I guess I knew as soon as I became an Alpha." Katsuki answered, making Izuku nod.

"How many other omegas are there in our class?" Izuku questioned curiously. He wasn't asking any names but he understood if Katsuki didn't want to answer.

"Pink cheeks and Froggy" was Katsuki's straightforward answer and Izuku was a little taken back and could only mutter and 'o-oh' before silence took over the table again. Izuku found himself sniffling from having a runny nose and he could guess it's one of the many upcoming symptoms of gaining your second gender and he laughed when he remembered what Katsuki told him about how awful it is. Just thinking about going to school tomorrow and having his nose abused with all the different smells and the intense headache he will have.

Kacchans scent is very strong...

Katsuki noticed the thoughtful expression on Izukus face and the small smile that tugged on his lips and it made him glad that Izuku was feeling better already. He quickly finished up his bowl and placed it in the sink along with the empty pot, since he cooked for two, and went back to izuku to find that he had also finished all his food and, in all honesty, with Izuku's stomach pains, throwing up breakfast, emotional breakdowns, and him discovering to be an omega... It kind of looks like Izuku is pregnant. Of course he knows that isn't true and that it's the reproductive system that is formulating inside of him making him have all of these painful experiences, but it's so close to someone being pregnant.

And, Katsuki feels another feeling bubbling up at his chest. A good feeling and for the first time, he agrees with his instincts, even though he doesn't quite understand what it's telling him this time, and keeps wanting to take care of Izuku and it doesn't sound... wrong like it should be because now, he likes spending time with him, even if it's just a little.

Katsuki then eventually notices that Izuku is struggling to stay awake so he makes his way towards him and guide him out of the booth and supports his body like Izuku did with him when Katsuki had hurt his leg during one of the intense tests, and almost drowning, Aizawa gave them. This time Katsuki was being Izukus cane.

He guided him towards their dormitories but he pursed his lips when they passed Izuku's dorm room. He was going to leave izuku alone in there but his instincts didn't allow him so he was left with guiding Izuku to his own room, growling a little at the thought of someone invading his space but stopped when he heard a small whimper from beside him and izuku trying to weekly step away from the blond but couldn't.

Katsuki immediately stopped before releasing his soothing pheromones again, realizing that he was emitting threatening ones, and pulled zuku close to him again so he could relax, successfully. He arrived at his door and pushed the door open and guided Izuku inside his room.

Izuku was too tired to understand or realize that they passed his room, but he did notice that the walk was taking a little longer than usual. But his thoughts were immediately interrupted when he was hit with a wave of fresh, hardened caramel candies with a hint of dark chocolate as a 'coating' and blinked as he looked around himself, noticing that he was in Katsukis room. He was absolutely terrified of how he ended up here but something else told him that he was utterly joyous from being surrounded by the fresh caramel scent, not exactly knowing it was his Omega saying so.

"W-why am I in here?" izuku asked with a little stutter from both fear and tiredness, groaning when he could also feel his happiness and fluttering heart. Katsuki couldn't exactly tell him that it was his instincts, because he himself wanted to bring izuku in here as well so he simply huffed while bringing Izuku to the bed and set him down.

"In case you need to go to Fucking Recovery Girl" katsuki answered with a small blush on his face as he looked away from the male sitting in his bed.

He could see izuku humm with closed eyes before a yawn erupted from izuku, stretching his limbs before he laid down on the bed, facing away from Katsuki, and bundled up the covers in his arms along with the pillows and stuffed his face into them. Katsukis stance was immobile as his eyes wandered all over the boy, burning holes on his back and head. His instincts went wild at how content he felt at seeing Izuku.

Katsuki growls again but this time to himself because seconds ago, he felt threatened by people invading his space but now he's happy about it. It was all so confusing. As soon as he starts to get used to his instincts with different, more powerful senses, something else makes him go nuts and in this case it is an Omega.

However, he finds himself sitting on his beanbag and thinking about it. He's encountered Omegas with similar smells to izukus, like pears or something like that, but he's never reacted the way he has with them. It's only Izuku and he doesn't know if it has always been that way, or because they are in the same class but then he thinks about Uraraka and Asui. He doesn't act the same way with them but maybe that was because they aren't a full Omega yet.

Katsuki huffed as he rubbed his head, feeling another headache coming up before he decided to grab his phone and see if he got any messages and he did. A lot.

Shitty hair: How's midoriya? You haven't come back after Mr. Aizawa sent you to the infirmary. +5 more messages from this user

Dunce face: I may be new to this stuff but as soon as you saw Midoriya throw up, I could literally smell yourself exploding... +2 more messages from this user

Raccoon eyes: I was worried about midoriya but he left his phone here with us along with his bag. I wanted to know if he was ok and all... +4 more messages from this user

Uraraka: Deku-kun left his stuff here and everyone in the classroom is really worried since Aizawa hasn't told us anything. +1 more message from this user

There were a more messages from Iida and Momo along with a few others on his phone but he shrugged them away since it was mostly about what was wrong with Izuku and considering that they don't know and that Aizawa hasn't told them, meant that it was Izuku's choice to tell them about his Omega. It wasn't that much of a big deal anyway but for one, Izuku is sick so he can't really do anything about that, and two, Izuku still has his own struggles to deal with.

He decided that he should probably answer a few people and tell them that everything was fine but to bring both Izukus and his own stuff because he also left his things in the class. After a while though, he started getting bored and simply went to sleep on his massive bean bag.

Bearly an hour goes by and Katsuki is startled awake by a loud thump and a flash of green blinding him. He was confused and his heart was pumping blood from the scare and suddenly woken up but then noticed the open door and a missing Izuku on the bed.

"Oh, shit" Katsuki said as he started getting up and running down the hallway, plugging his nose when overly sour apples started invading his nostrils until he reached a gagging Izuku once again, leaning over one of the many sinks that were in the bathroom. He left the door open to allow air filters inside before making his way towards the boy, still keeping his nose plugged.

"S-sorry kacchan..." Izuku croaked out after he emptied his stomach once more and dropped to the floor as he held a firm hand onto his lower abdomen and placed his head down against the tiled flooring and sobbing at the immense pain.

"Don't fucking apologize" katsuki grumbled as he turned the water on in the sink before kneeling down and allowing his own scent to fill the room. Unplugging his nose.

"I just want to eat. And sleep. Please..." Izuku said in a broken voice as he cried on the floor, feeling hungry but tired from his energy becoming strained. Recovery girl told him that the process was going to take more than a few days and that it was certainly going to take his stamina away but she never told him how painful the process was. Tho, that shouldn't be said because it was to be expected after she told him that he's growing a whole ass organ inside of him in the matter of days when it usually takes years for it to naturally develop fully in a female's body.

Katsukis heart cracked when he heard his broken, pained voice, and immediately sat on the floor and brough Izuku in his embrace and encased him in himself. Izuku seemed to like being in his room so maybe this could help a little but he let out a really low and loud growl when he could hear voices and other people's scent, Denkis being stronger.

Minutes pass and Katsuki is glaring at the people who were standing at the bathroom door, a few with a panicked expression.

"Is Deku-kun ok?!"

"What happened?"

"I thought you guys were in the infirmary room?"

"Why is Midoriya on the floor?"

Katsuki started emitting threatening pheromones and hagakure backed away while Denki furrowed his brows and slowly turned around to shoo away the others and closed the bathroom door, leaving Katsuki, Izuku, and himself inside.

"Get out" Katsuki warned and Denki only shook his head no and plugged his nose, even though he could still taste Katsukis scent and how bad it was.

"I'm trying to help" Denki said before he crouched down in front of the two and looked at Izuku who was whistling through his nose and trying to get away from Katsukis hold.

"You're freaking him out Bakugou, calm down before something bad happens." Denki spoke again when he saw Izuku's dilated pupils and started to give out quik zaps of his quirk and starting to become more aggressive with his thrashing.

Katsuki looked down and immediately stopped his threatening and started to fill the room with his sweet caramel scent and felt Izuku relax.

"Hey midoriya?" Denki asked as he looked at Izuku directly in the eyes and watching as they went back to normal before he dug inside his pocket and pulled out a small wrapped up candy and holding in his hand and hearing the small 'yes?' that came from the boy that was behind Katsukis arms.

"Have you been throwing up all your food?" he questioned as he scooted a little closer to his friend. Izuku pulled himself free from the katsuki and sat down on the tile flooring with his knees up to his chest and nodding his head.

"I'm assuming you know that I'm an Omega?" Izuku questioned with a small laugh, his face red and wet from tears but still tried to make his situation better.

"Yea... anyway. My cousin said that if I happen to be an omega, or one of my friends, he told me to give them these." Denki said as he held out his hand with a pack of gummies with an Omega symbol on it.

"He said that they work really well and had extras left over from when he had... you k-know? Denki said as he looked away in embarrassment since he was talking about Izukus 'uterus' and what-not.

"O-oh... thank you" Izuku said with his own embarrassed blush as he took the paket in his hand.

"He also said to have warmers or heating pads to make it less painful. He said that his sister uses them when she is on her period. It should help" Denki said before he got up from his spot, Izuku and Katsuki following suit.

"T-thank you but can you not say anything yet to the others? I would like to tell them myself when I feel better" Izuku said as he looked at the male in a pleading voice. The bright blonde gave him his famous smiles and thumbs up before he walked out of the bathroom.

Katsuki instantly relaxed as soon as Denki was out of the bathroom and turned off the water faucet in the sink before turning to Izuku.

"Take a shower and if you have any problems, I'll be in the kitchen," Katsuki said before walking out the door.

He sounded harsh because all while Denki was there, he could smell lemon trees and fresh soil coming from him and it irritated him because it got all over Izuku and he smelled like oranges. It was weird but he was sure that he smelled like some sort of citrus and he didn't like how it was masking over Izuku's apple scent.

Stupid, fucking instincts, stupid brain and stupid nose!

Katsuki rubbed his nose aggressively before making his way towards the kitchen to get his stuff back, which was neatly placed on one of the counters next to Izukus. He scowled and was about to go to his room but stopped when he remembered that he promised Izuku that he would be in the kitchen.

"Hey bro! Present mic said to give you these papers for the english homework. He said we have finals later next week." Kirishima said cheerfully as he had a small stack of papers in his hand and placed them on the table where Katsuki was sitting before taking a seat himself and getting out his homework.

Katsuki was really on edge the whole time and it kept getting worse and worse as time passed. He was anxious and he kept glancing at the bathroom door, waiting for Izuku to get out but he was always refocused on his homework when someone would call out his name or Kirishima asking a question about the homework.

The reason why izuku was taking so long however, was because he was staring at himself in the mirror naked. He never noticed before but his body was different from everyone else. Sure, he knew he was short considering he was a male of the height 5'5 and he was one of the shortest guys in the class. Mineta is really short and fumikage comes right after and then izuku. At least he's taller than some girls but he couldn't help but feel like he was a girl. He felt like a girl, he looked like a girl, and he is going to have an organ that girls are naturally born with and tears started brimming at his eyes at how different he felt.

"Why do all these things happen to me?" Izuku said through his tears as his gaze went down to his toned stomach and put and handed it over where a baby could grow in there and it only brought more tears to his eyes.

He doesn't have anything against omegas, truly. He respects them like they are like any other person but he wants to become a hero. He already has been struggling with his quirk and now he has other things to worry about. If he weren't a hero in training, then he wouldnt feel so bad about it no matter how precious being an Omega really is.

So Izuku had retreated back to get his towel and wrap it around himself before he peaked out the door. Luckily no one was around except for Katsuki, Kirishima, and yaomomo making tea so he stayed near the wall and made quick work of rounding the corner and towards his room, sniffling when he finally reached the door and went inside.

Katsuki didn't hear Izuku come out of