There was the sound of volleyballs being smacked and hitting the gym floor boards echoing back and forth on an annoyingly hot summer afternoon. Sometimes those balls were received and then sent back up to play the next note in this messy orchestra, but sometimes it landed on the ground and led every player to wait for the next round to begin. A blond man, standing in the back row of his team's side of the court, could feel the heat running up his skin, calling upon his sweat gland to release liquid that would make him feel even more uncomfortable. The rumbling sensation in his stomach was causing a storm in the wrong place and wrong time while the dizziness in his head made his vision swirl around. If he hadn't concentrated, he might have even seen twice the opponents that were supposed to be there.

Tsukishima Kei felt the heat. Or rather, his heat.

The heat every omega felt during their time of month. That irritating, unavoidable heat that comes whether you want it to or not. And within that week was when it became clear he was an omega. The only time his straightforward face and blunt personality (which in all honesty, made some people suspect he was an alpha) were cast aside by his need to be dominated over.

Maybe it was his significant increase in exercising due to the training camp, a change in diet which he hadn't noticed, the devastating season or the fact he was surrounded by alphas releasing hormones to showcase their dominance in a simple game of volleyball. But the problem didn't change even if the reasons did, his heat was early. Of course, Tsukishima felt that the last one was probably the most accurate as well as the most troubling reason. Karasuno's team alone had two alphas, the captain and the first year setter, but twice—no thrice the number and it would send any omega's heat to an early start, then send any omegas in heat into a rampage.

The referee blew his whistle and everyone on the court ran over to the sides, drinking big gulps of water before his team was sent to do a lap of flying falls. They lost, again. Not that it were a surprise since they had been losing almost every match so far.

On the other side of the gymnasium, a black-haired man from Nekoma smelled something in the air. It was an alluring scent that drew him in and even distracted him from the ongoing battle. Kuroo Tetsuroo had seen omegas beginning their heat before however within his team the only omega there was Yaku, who did a good job 'controlling' his heat and making sure it doesn't affect any alphas on the team. Yaku wasn't on his heat right now, as the omega had confirmed to the coach and the team again and again just before the camp had begun. Kuroo felt the scent wasn't emitting from anyone near him at the moment and brushed it aside.

He noticed a gaze from another alpha and he looked over to Bokuto, who was resting up after his match with Karasuno. The Fukurodani gave him a smile, as if saying "good luck". Kuroo smiled back before turning and focusing on the game, his heart fluttering.

Kuroo's back slammed against the lockers, his lips pressed roughly by Bokuto's. He felt the other alpha's tongue invite itself into his mouth, and he fought back, pushing Bokuto down to the ground so that he was above of him.

Kuroo's tongue traced its way down to Bokuto's neck and his damned alpha nature made him feel nauseated. He rebelled against his instincts and placed several kisses on Bokuto's neck until the latter shoved him away, a pained look on his face and Kuroo understood why.

There was no way for two alphas to be together. He loved Bokuto dearly and Bokuto loved him back but their instincts hypnotised their minds into wanting to dominate. Kuroo would try and exert his dominance over Bokuto and Bokuto would do the same to Kuroo. It hurt and irritated them when neither one of them could satisfy their alpha needs. This meant they never went further than touching each other and they've only done that twice. That said, they've never even spent their rut together.

"I-I'm sorry..." Bokuto apologised, his face filled with agony from both his unfulfilled alpha needs as well as the mere fact he was an alpha. He and Kuroo could never be together and they both knew it but they still tried, tried to not let nature get in the way of their love.

The black-haired alpha forced a smile, "It's okay." Bokuto could see through his facade but didn't bring it up.

Kuroo helped his lover off the ground and the two of them exited the changing rooms, looking around cautiously to make sure no one saw them. When the coast was clear, they both strolled down the path to the canteen for dinner.

Bokuto was pouting and of course, Kuroo noticed this. The black-haired alpha took a deep breath in and threw his shoulders over Bokuto's and laughed, "C'mon bro, don't look so down!"

"Well... it's just..." Kuroo looked over and noticed Bokuto's upsetting look. During his 'down' moments, Kuroo admitted Fukurodani's setter did a better job at cheering him up, which made Kuroo feel annoyed in silence.

He had to change the subject. Kuroo's face went serious, and he questioned the other alpha, "Have you been noticing that smell?"

Tsukishima snuck into the dormitories for the omegas and betas, his breathing getting heavier with every passing second. He managed to hide away from everyone in the gymnasium when they were released for lunch. The omega yanked open his bag pack he brought over for the training camp and pulled his clothes out of his way until he found the bottle of heat suppressions he had brought along just in case something like this happened. And he thanked God he did. However as Tsukishima examined the bottle, he noticed something wrong. On the cover, it wrote '30% STRONG' instead of '90% STRONG'. He flipped over the bottle and clicked his tongue when he saw the name 'Akiteru' written on the bottom of the bottle.

Tsukishima felt another turn in his stomach, his face slowly heating up. He cursed under his breath. Akiteru's heat suppressions were weaker than his significantly because the omega already had a mate of his own and the suppressions were only for emergencies and only lasted for about four hours. He took out one pill and threw it into his mouth, then drinking some water to help him swallow.

As he laid down to wait for the suppressions to kick into action, the omega considered his options. He could take a heat leave, but how could he get home? He didn't have enough money for transport and having the bus drive all the way back to Miyagi just for a single student seemed like too much to ask for. Tsukishima's best option now was to take a pill every four hours. The heat only lasted five days at most and he simply had to make sure he doesn't fall to his instincts. The blond looked inside the bottle and it looked like there was enough pills to last him.

When he finally felt his body calming down thanks to the pills, Tsukishima got up and made his way to the canteen for lunch.

Kuroo and Bokuto were in front of the canteen.

"What smell?" Bokuto replied to Kuroo's question, then grinned back, "The only smell I've noticed all day was yours." He placed a kiss on the black-haired alpha's cheek and ran into the canteen to join his other team mates, seemingly to have recovered from feeling upset.

Kuroo sighed, smiling slightly at his lover's answer. He took a sniff in the air and lost his smile. There was definitely a smell and his instincts immediately connected it to an omega in heat but if so, why didn't Bokuto smell it?

He walked over to his team mates and sat next to the setter, Kenma, still trying to put the puzzle pieces together in place. Kuroo knew the names of the alphas and omegas around here unless they were a first year or from Karasuno. Then it hit him. Karasuno.

"Are you going to eat anything?" Kenma interrupted his train of thoughts. Kenma was an alpha like him, a surprise to most people.

Kuroo grinned, "Ya, I'll be right back." The alpha got up and ran off, almost disappearing immediately from Kenma's sight. Kenma was confused, but he really couldn't bother with whatever Kuroo was doing.

1 hour until his heat kicks in. Tsukishima sighed as he sat next to Yamaguchi. He took a pill about three hours ago and figured he could sneak away after dinner to pop in another. It was difficult maintaining his heat and he wanted to get back into the safety of the dormitories as fast as he could, taking lesser food than the other players which in turned made the libero complain.

Tsukishima took a bite from the fried prawns when he noticed a scent in the air as if calling out for him. He was good at keeping his heat in check and always took heat leaves to deal with it at home with a dildo to satisfy his instincts and never came across something like this. An alpha was seeking him out and it only meant that he was already unintentionally releasing small amounts of pheromones into the air. Though none of the other alphas in his team seemed to notice, so why was there one specific alpha noticing?

There came Kuroo Tetsuroo with his infamous grin, "So it's you, Megane-kun."

Tsukishima rolled his eyes, "What's it to you?" There was a strong smell coming from the alpha that wasn't his, telling him to back off and the omega commented, "Have you... been scented?"

The alpha averted his eyes and replied, "Well... yeah but... that's not why I'm here!" His voice went soft such that only Tsukishima could hear him, "Your scent has been really obvious... to me at least. So if you plan on staying, keep that heat in check lest someone ends up fucking you."

The omega felt the alpha's seriousness through his demand, rather than request. He felt his heart skip a beat, sweat trickling down his face and his legs shivering because of the presence of an alpha. His instincts told him to let his heat take over his mind, let himself fall to the ground and present himself to the alpha, let his legs spread open—

Tsukishima jumped back, cringing at how his omega self actually lead him to want to obediently give himself up to Kuroo. Besides, the alpha already had someone else scenting him.

"Yeah, I'm keeping it in check. I don't need you to tell me that." Tsukishima barked at the alpha as he stood from his seat. His steps quickened as he escaped the crowd and into the toilet to calm himself down. The omega knew his body was already begging him to let the slick just flow out from his entrance and mate. He turned the tap, removed his glasses and splashed the water over his face. His heart was throbbing and he knew he could easily go to another omega and ask them for help but his pride wouldn't allow him. It was relatively obvious that he was an omega because of his scent and Tsukishima didn't see why he should bother hiding it but there was still a limit to how much he is willing to share about his omega life and one was that was his heat cycle.

44 minutes until his heat kicks in. The omega took deep breaths and he finally regained his composure. He put his glasses back on and made his way out, along the pathway back to the dormitories.

"Hey you! Megane-kun from Karasuno!" Tsukishima stopped in his tracks when he heard a voice calling out to him. He looked up – Gymnasium 3.

"Come block for us!" the omega's eyes traced its way to the source of the voice, the captain of Fukurodani. With him were the vice captain of the same school and Kuroo. He narrowed his eyes and attempted to refuse but would later be taunted at and the omega would join in their extra training. He knew this was a mistake, that it would only waste his time that was supposed to ensure he doesn't go into a heat frenzy. Worst of all, there were two alphas around him as Tsukishima picked up on their scents. The vice-captain, Akaashi, didn't produce any sort of distinct smell and Tsukishima assumed he were an omega.

12 minutes until his heat kicks in. They had been playing for quite some time, the blond omega noted. There were several balls laying around as a result of their practice. Kuroo had brought up about Hinata and Tsukishima both being middle blockers and jokingly said the blond would lose out to Hinata. Of course he would. Tsukishima forced out a smile, "Well I really can't compare to someone like Hinata, I guess."

Hinata was not only talented in terms of volleyball, he was the ideal omega. Even Tsukishima can't help but feel inferior. He was cheerful, small and adorable in contrast to Tsukishima who was tall, bigger and blunt to the point it annoyed some people. It was only natural people would compare the two as Sun and Moon and it irked him because he could see through some people that they obviously preferred being round the shorter omega.

A group of Nekoma players entered and started going about joining their game and the omega took this opportunity to stop the extra training and let himself out.

"You stepped on a landmine, Kuroo-san."

"You made him mad."

The black-haired alpha sighed and turned to the other two, "Yeah I know... I'd better go and apologise..." With that, he took off and chased after Tsukishima. He looked around for a little before he figured out the omega might have already gone back to the dormitories. Though his dormitories were for the omegas and betas so Kuroo had to enter the place cautiously.

He turned the corner to where Karasuno's omegas and betas were staying. Tsukishima wasn't there.

7 minutes until his heat kicks in. Kuroo took a sniff in the air and he could smell the omega's scent. He was pretty far, near the gymnasiums but if his scent were strong enough for the alpha to pick up, Kuroo figured it wasn't a good sign.

Kuroo had to help out Tsukishima get back to the dormitories quickly and take his pills. Apologising for his words were the least of his worries if the omega just dropped to his knees with slick leaking out uncontrollably. The alpha felt a cold shudder down his spine. The pheromones this omega was releasing were already affecting him.

He was getting closer and with every step, the sirens in his head were getting louder and louder, screaming at him excitedly that he was getting closer and closer to an omega in heat. Kuroo found himself approaching the omega-male toilets and he held his breath, trying to calm the bulge in his pants, unsure when it even appeared.

His heat kicked in. Tsukishima clenched onto his stomach as he sat in the corner of the toilet. He felt the slick flowing out from his entrance, his pants dirtied. He leaned against the wall and opened his mouth slightly to breathe properly, only to let saliva drool its way out and land onto his shirt. The floor was already wet from his slick sipping through his clothing. The omega was sweating all over, his hole twitching from the need to be mated. He wanted to be fucked and violated right then and there, to stop the pain he was feeling all over. Tsukishima looked up, his whole face burning red; he looked at Kuroo's face, then in between the alpha's legs.

"Al... alpha..." Tsukishima slowly got on all fours and crawled over to Kuroo, and then getting onto his knees so that his face inches from the bulge. The alpha backed away, knowing he shouldn't fall to temptation. Tsukishima felt the liquid from his ass slip down along his thighs and he leaned in to place a kiss on Kuroo's bulge.

"Tsu-Tsukishima!" Kuroo shouted, though his body was working against his mind, the only part of him still resisting the omega. Tsukishima grabbed onto his pants and slowly pulled it off, revealing his mess to the alpha. He looked back at Kuroo's face, his glasses foggy from his breathing.

"I-I want... alpha... alpha..." Tsukishima whined. He slowly turned himself around so his ass faced Kuroo. He was presenting himself.

If Kuroo were in his right mind, he could have easily made some sort of sarcastic remark and refused the omega, bringing him back to the dormitories. Or so he thought. The omega in front of him was presenting himself and his lower half way getting even more wet because of him. The omega was begging for him and he had never felt an omega's pheromones this strongly and this up close before.

Kuroo got down over Tsukishima, his head nuzzled against the omega's neck. He could smell his so clearly from here and it was making him crave more. He lifted his head and pressed his bulge against the omega's entrance, receiving back an erotic moan. Kuroo moved one hand to the omega's nipple, pinching it gently. Tsukishima let out another moan, pushing himself back against Kuroo as if signalling for the alpha to take off his pants and give him what he wanted.

Kuroo let out a soft growl, one that made the omega feel small but in an excitable manner. It was one that told him he was going to be dominated over and Tsukishima winced in return.

"Spread your legs..." the alpha's words flooded Tsukishima's head. He did as he was told and felt a finger going inside of him. The finger moved around, soaking itself in his slick. Soon entered a second finger... and a third.

Tsukishima was dying of pleasure, he moved his head towards the alpha and planted a wet, soft kiss. Kuroo responsively massaged their lips together before giving the omega a lick. The omega opened his mouth up, welcoming the alpha without fighting back and of course, the alpha's tongue indulged itself.

This was so much different from making out with Bokuto. There wasn't any sort of resisting and the alpha felt he could continue all night with the omega. Kuroo was so drawn in, so attracted to every second this omega was giving himself up to him. He was dominating someone, he was easing his instincts, everything was right.

He pushed the omega down to the ground, though making sure he didn't end up hurting the other. Next, Kuroo yanked his pants down to unveil his swollen member. He swallowed before he pushed his tip inside of Tsukishima's entrance.

"Ah!... I w-want it!" Tsukishima cried out in pleasure. Hearing the omega pleading for his dick, Kuroo thrust himself deeper in. It felt so good inside, hot and wet and everything he never thought he would experience. He licked the back of the omega's neck before seductively asking, "What do you want?"

Tsukishima swallowed, "Y-your dick... your p-pups... I want your pups..." Kuroo shifted his hand to the omega's cock, "Then... cum..."

"Mmm!" the omega whined, his own seeds spilling onto Kuroo's hands. Kuroo lifted his hand to his face and licked it, making Tsukishima shiver. He was still moving and once he knew he was deep enough he placed both hands on the omega's waist, "Relax..." Though in contrast to his words, he felt the omega's hole tighten. The tip of his cock swelled up as a knot began to form, causing Tsukishima to yelp. Kuroo grinned and closed his eyes as he let out his seeds, an image of Bokuto's face flashing across his mind but he casted it aside. Right now, in front of him was a blond, bespectacled middle blocker.

He let out one more flow of his seeds before withdrawing his deflating member. Tsukishima fell to the ground, gasping for air and Kuroo's seed mixed with his own slick leaked from his hole. Kuroo leaned over and lightly kissed Tsukishima's cheek. He laid down next to the omega until he slowly sunk back into reality and only then did he push himself away.

Crap. What was he supposed to do now? He couldn't even face his own lover now. Kuroo got up and leaned against the toilet wall, letting all the memories of him fucking Tsukishima roam around his mind. He couldn't pretend it never happened nor pretend it was all Tsukishima asking him for help. What was Tsukishima going to say when he woke up? What if he never wanted to be knotted in the first place? And the worst part came into play, he casted aside the thought of Bokuto during the heated moment. Kuroo not only betrayed his lover, but threw him aside when an omega presented himself to him. He regretted how shallow he had become.

How could he? How could he have let his instincts that he has been fighting against all these time for the sake of Bokuto finally overcome him?