Battle Of Instincts
"Okay, you better not move"
Izuku could feel how the alpha under him shivered as he took his length into his mouth, he could almost fit half of it before he choked.
He had to concentrate immensely to suppress his inner alpha, it lashed out at his mind every second for sucking another alphas cock.
Kirishima to his surprise tried really hard to control himself too, he didn't move his hands away. His hips trusted a little into him, but that was stopped as he put his hips down with bruising force.
The boy groaned and moaned as he sucked him off, he wasn't new to this. He had done this multiple times before, but it was different to suck a beta or omega for their pleasure.
He was an alpha, an omegas or betas pleasure was his pleasure. He liked it how they squirmed under him, how their tiny cocks fitted in his mouth.
The sweet taste their cum had, this alphas cum didn't taste sweet. It was bitter and he had no idea why betas and omegas liked it so much, probably it was the sub gender that made it so.
He could see how Kirishima's knot slowly started to form, he hasn’t even started yet. Though, getting one orgasm after another without a knot must have set it on edge to form.
"Oh fuck, that's so good, I'm gonna come soon" At least Kirishima knows what he was supposed to do. He was about to get his head off his cock when Kirishima's hands moved and shoved him back down. He choked in shock as the other alpha came down his throat, knot forming right in front of his mouth.
"Oh, yea, yes baby. I'm gonna knock you up with my pups, gonna fill you with my cum pretty omega" Izuku's alpha had enough, he wanted to beat the shit out of this guy.
But Izuku's human side knows that the other's mind was clouded, that he couldn't think straight. His alpha pride was damaged, either way, he let him have this and beat the guy later up.
He will fight the guy so many times until his pride is completely restored, when they are done the other alpha will not dare to look at him the wrong way.
He swallowed down all the cum that came out of this fucker, he even squeezed the knot like when it would happen if he really knotted someone. The problem was even more cum came down his throat.
With time he had could say that he had gotten used to the taste, though, that doesn't mean that he liked it. He will chock the alpha on his cock if his alpha's pride demanded it, just not in his rut. He wasn't this cruel, no he would wait.
He is a patient man, after all, he will wait for the right moment and get his revenge.
Kirishima sighed in relief as he had his best orgasm in his life, no one had ever done that for him. Shit, speaking of somebody, his mind was clear now after this intense orgasm.
He would have at least three hours until the rush would come back, his first blow job was done by an alpha. Not just any Alpha, the guy was tall, strong and the definition of confidence.
This alpha glared right back at him as he slowly took his hands from his head, his now soft cock coming out of his mouth. The hateful glare he got, send a shudder through him.
The other alpha's mouth closed in a snap the moment his cock was out. This guy must have the best self-control he would have ever seen, he had growled at the guy when his hands just got near his pants.
That guy hadn't just taken an alpha's cock into his mouth, no he had also let him cum in him without making the slightest threatening sound. Though, his eyes screamed that he was more than unhappy with him.
That guy had even squeezed his knot in order to get him a better orgasm and he shamelessly used him, so unmanly of him.
"I'm so sorry bro, that was totally unmanly of me. You helped me and controlled yourself, while used you and let my instincts take over me" Kirishima said as he bowed deeply.
"Don't expect me to help you like this again, at least you know that you fucked up. I will handle it after your rut is over, so don't think this is forgotten." Izuku said as he whipped his mouth, there was cum left and Izuku gathered it on his fingertips. He then held it out in front of Kirishima, the other alpha knew what he wanted.
The problem was that his inner alpha refused to lick his own cum from another alpha's fingertips, it was an implication of submission. Kirishima battled with his mind against his instincts as he leaned forward and sucked on the two fingers, he owed that to Midoriya.
Izuku didn't let that chance slip to show his dominance as he pushed his fingers deeper into Kirishima, the smaller alpha wanted to protest as he tried to back off.
Izuku wouldn't let them happen, he grabbed a fistful of Kirishima's spiky red hair and held him in place. His fingers fucking into that mouth, he tightened his grip when the other started to bite him.
"You will take that and control yourself until I'm done. I did it as I had your dick in my mouth and your cum down my throat, you called me an fucking omega. If I could take that then at least have the control to take fingers." Izuku spat out, he was angry. Not just his alpha was screaming, no, he as a human was angry with the way he was threatened.
Kirishima relaxed his jaw as Midoriya forced his fingers down his throat, he choked a few times and didn't know how the other alpha had managed that.
It was only fingers and yet his alpha was screaming at him, he lucked out as Midoriya took his fingers out of his mouth before he lost the fight against his instincts.
Midoriya didn't stop there though, no, he whipped his fingers on his face before gave a harsh slap. He knows why he did that, Midoriya's inner alpha must have taken a hit or two from his actions. Now he tried to restore that, showing his dominance over him.
"Go to sleep, better get as much as you can before the rush starts again." Izuku said as he pulled an energy bar out of nowhere and gave it to him.
"Eat, shower, sleep. I will change your sheets again, or do you prefer to sleep in your cum?" Izuku asked seriously because he had seen omegas that slept better in their slick-filled bed.
"Change it" Kirishima said as he stood up before he was slapped again.
"At least ask politely when a stranger is doing something like this for you" Izuku said sharply as a huff of annoyance left him.
"Could you change it, Please?"
"There you go, wasn't that hard now, was it?" Izuku said as he started to change, he quickly got out of the room into the shower.
Kirishima woke up when it was still dark outside, looked at his phone he saw that he had slept for five hours. No wonder he felt so rested, that never happened before.
He never slept more than an hour most in his ruts, was it because he had knotted? He never did that before in his ruts too, well doesn't matter right now.
A low groan made his way out of his mouth as he was hit by another wave of lust. How was he going to survive this again, he jerked himself slowly off as he looked around the room.
He spotted Midoriya in the corner of his room, sleeping peacefully on a mattress from who knows where.
Was his scent really that weak that another alpha could sleep in his room while he was in his rut? Or was Midoriya just a special case, he after all had amazing control over his instincts.
The taller alpha slept shamelessly in just his underwear without a blanket, it was normal behavior for an alpha. Though he was in a stranger’s room, a bit of shame wouldn't hurt. On the other hand, Midoriya had nothing to be ashamed about.
He was the definition of manly, the goal he wanted to reach. He was a head taller than Kirishima, he had defined muscles everywhere.
His back was a piece of art as he moved a little, his thighs were almost double his size. This bicep was getting drool out of his mouth, even his neck was muscled. He would like to see how the alpha looked from the front.
He must have a nice six-pack or maybe even an eight-pack. What his cock would look like, probably as massive as the guy was. His mouth water at the view, the very definition of manly.
He really wanted to have sex with that manly guy, have him under him as he fucked the guy's brain out. Bite his neck and make him his beta, make his cock-warmer.
He would whine his name out with each thrust, he would beg for more like the cock hungry slut he was. This muscled ass, it would be so fucking tight, hugging his cock the right way.
He didn't even touch himself as he came, it was the second-best orgasm he had so far.
"Cut that train of thoughts immediately or I will pin you against the floor and mark you." Midoriya said from behind him, it was like yesterday.
What was this guy’s quirk anyway, illusion, mind-based or speed? Teleportation, ha it was too rare, there were only 6 known teleportation quirks in the whole world.
"I must say that you have guts to think about dominating me, you a first-generation alpha." How did even find out?
"I helped enough betas to know this scent, their lust after me. But to make sure I just heard what you were clearly saying out loud." Kirishima blushed, this could really be dangerous for him. This alpha could reduce him to a beta with just a single bite, mark him and make him his property.
"I have shown you a patience that you probably will never find in any other alpha again, but even I can't take these kinds of insults" Kirishima was on his stomach as Izuku holds his hands behind him.
He yelled as Midoriya bit him, not his scent gland, but it was just inches away from it. He was so close to becoming a beta, he was thankful that Midoriya only gave him a lesson.
"Cock-warmer, slut, moaning for you and even begging, are you even aware of how insulting that is?" Midoriya asked in an angry tone as he bit his neck again, he was getting marked.
His alpha protested, but there was nothing he could do. He could use his quirk, but Midoriya would just wait it out. The punishment could become harder.
"You thought, I would kneel the whole day under your desk in class and suck your cock to hold it warm?" Midoriya asked as he bit his ear, leaving another mark.
"That I would be begging for your cock, that the class would watch how you fuck me good" Another bite on his shoulder this time as his cock hardened.
"Any other alpha would have you on your knees now, you would be presenting yourself. They would probably fuck you without preparation since you angered them. They would get you outside and let everybody fuck you and they can decide that because they would be your fucking alpha. So, keep your fucking mouth closed or I will stuff it" Midoriya said.
"You should better watch out, should you ever become mine these things will happen to you. Are we clear?" The taller alpha asked, and he could only nod against the floor.
"Yes Alpha" Kirishima blushed as the words slipped out of his mouth, his head tilting in submission. The fear Izuku had planted in him as he said these words combined with his inability to move made him let these dangerous words out.