One of the Cool Kids

Izuku looked at the mirror, examining every inch of his body.

Was it, perhaps, a bit too much? He was contemplating changing his costume to something else – he could make a ghost one easily enough, right? – when the doorbell to his apartment rang. With his mother out for the weekend with her friends, Izuku had to get the door himself.

“Denki-kun, Ochako-san!”

His two best friends smiled from the other side of the door, even as they inspected his costume, possibly just as much if not more than he had earlier.

“Oooh~ looking good Dekun~” Ochako laughed. The beta then placed one of her hands against his fitted gloves. “I was worried that you were going to be geeky with your homemade cosplay but this is spectacular!” 

Of course Izuku was going to cosplay – he had been working on the design for ages and this was the chance to reveal it to others, at his very first ‘adult’ Halloween party, hosted by a former senpai from the track and field team. Still, the idea of being seen in a skimpy version of his favorite superhero’s costume was nerve wracking. “You don’t think it’s too much?”

“Course not,” Denki responded. “Although you might need a jacket to go over top – it’s not even late but it’s kind of chilly…” Compared to both the blond omega’s cheeky devil costume and Ochako’s witch one, Izuku was showing a lot more freckled skin.

His costume was made of a dark green form-fitting bodice modeled after one of his favorite comic book heroes; deep red high tops paired with black thigh high socks; white and blue gloves that went up to his forearms; finished off with a short sleeve green hoodie with the signature rabbit-like ears and face mask to complete the similarities to Green Rabbit!

But no, Denki was definitely right, he needed something to go over his cosplay. Grabbing a longer coat that went down to his knees, the omega made sure he had his keys, phone, and wallet before heading out. He was more than happy for the chance to hang out with his friends and go to the lavish Todoroki villa on the outskirts of the town and live it up, just for the night.

The train ride didn’t take long and they made it to the station closest to the Todoroki residence just in time to meet up with another former upperclassman who was in town to buy drinks. Sero-san was more than happy to give the three teenagers a ride up to the estate.

Hanta laughed from behind the wheel, grinning at the younger students. Ah, they were just so cute. He should probably be a good senpai, help them steer clear of the rough-housers that are inevitably going to be there, especially if Shouto’s older siblings had their friends over too. 

“There’s a lot of familiar places from high school, plus new people from everyone’s circles and clubs. Know anyone else?”

He watched as Izuku shook his head, but Denki next to him lit up. “Yeah! Shinsou said he’s coming,” the blond said with a grin, more than happy to have more chances to talk to the older alpha. “And my onii-chan is going to be there! He’s-”

“Wait, the ever amazing aniki who was overseas modeling for your dad?” Ochako butted in, surprise coloring her voice.

In all their years knowing each other since primary school, no one had… actually met Kaminari Denki’s older brother. They had heard plenty of stories – that ‘Kacchan’ was so pretty people stopped on the street to stare at him, that he was such a strong alpha he could make any and everyone submit to his commands before using his alpha voice… The only things they actually knew was that the man was 2 years older than them and was blond just like Denki. And ‘Kacchan’ was smarter than Denki was (“Which,” Ochako would say with a laugh whenever Denki would mention this tidbit, “isn’t that hard at all. I’m fairly sure the only reason why you haven’t failed entirely is because your literature scores break the curve and you have us helping you.” Denki would pout but not deny it in the slightest.)

“Yup~” the omega sang. “He transferred to Yuuei University last semester. From the sounds of it, he’s in a lot of the same circles and classes as Shou-senpai!”

“Really?” Hanta hummed in response, as he parked his car in front of the mansion they were partying at, “Well, some point tonight you’ll have to point him out to me.” Even the older students had been regaled with stories of the amazing aniki during the brief time they were on the team with Kaminari.

Denki’s laugh answered him, even as the blonde started unbuckling and getting out of the car. Ochako and Izuku followed after him at a more sedate place, thanking the older beta for helping them out. Hanta waved them off (“Anything for my cute, Inter High winning kohais!”) as he grabbed the bags filled with chips from the trunk.

Despite the relatively early hour of 7 pm, the party was already in full swing – dark lights and holiday themed decorations combined with dry ice fog gave the building a spooky feel, while a DJ mixed tunes that reverberated throughout, some partygoers dancing while others laughed and talked with friends, trying to be heard over the beats. 

They lose track of Denki the moment they walked in, the blond omega more intent on finding his boyfriend than staying with his besties. Then Izuku finds himself alone, Ochako nowhere to be found when he took the time to find the coatroom (and it was a room, because of course, a home this large and extra had a full-on room) and hang his jacket.

It’s nerve wracking, Izuku realized rather quickly, being a lone omega in a party with people he didn’t know. He could feel eyes on him, and while for a moment he worried everyone knew he was an unmated omega (and how could they know? Izuku was positive the whole ‘unmated omegas smelled different than mated ones’ thing was a myth and his unbitten neck was covered by his cosplay), Izuku realized it was likely due to his costume. At the very least, no one was calling him a nerd and trying to kick him out of the party for cool adults only.

The next several minutes had Izuku weaving between partygoers, giving thin smiles and cheery waves, miming he can’t hear them over the music whenever someone asked for a dance or if he wanted to drink. This worked well enough, people leaving him alone, until he walked past the DJ setup in one of the formal living rooms and someone grabbed his arm. Izuku turned around to see someone with lanky hair and a hand mask over his face – one of the more popular villains from his favorite series, in fact – try to talk to him over the blaring music. The omega gave a strained smile and gestured to his ears as he tried to pull his arm away. The taller person huffed and started pulling Izuku away from the sound system into one of the side hallways.

The sound was muffled here, and the other person released Izuku’s arm as he grabbed the hand mask off his face. He was an older alpha, light color hair that bled into black at the roots and he gave Izuku a once over before giving a creepy smile, cornering the slimmer figure against the wall.

“Uh… hi?” Izuku’s voice was meek as he looked away.

“Hey there,” the alpha’s breath was tinged with alcohol as he looked down on Izuku, “what’s a morsel like you doing wandering around all on your lonesome.”

“N-not much to be honest, just-”

He was cut off by the alpha smiling wider, “Then maybe you and I should hang out, grab a few drinks, get to know each other…” The last part was accompanied with a leer that made Izuku highly uncomfortable, a tinge of unease traveling up his spine.

Before he could say anything though, a bored sounding voice piped up. “You shouldn’t be propositioning underage students, Shimura-san.”

At least Izuku knew this voice, “Senpai!”

From further in the house, Todoroki Shouto emerged in a classic vampire costume, arms crossed and looking disapprovingly at Shimura. “And I’ve told nii-san that if he and his friends harass any of my guests, I have no problems with asking you all to leave.”

Shimura grumbled for a moment before moving away; Izuku took a deep breath, only now realizing that the alpha was suffocating him on his pheromones when he was over him.

Shouto watched the older alpha walk away, before turning to his underclassman with a small smile. “Sorry about that, my brother and his friends decided to crash my party instead of going bar hopping,” he apologized. 

“It’s perfectly fine, Todoroki-san!”

This was familiar territory, listening to Izuku babble on about any and everything, parsing out the important information and letting the rest of it flow around him in comforting chatter. It takes little time to understand that Izuku had been looking for two of his other former underclassmen, who were probably having fun with others.

A good host would help Izuku find his friends. Sadly, Shouto just wanted to find his boyfriend, get drunk, and then maybe fuck in his dad’s bedroom while he was away on business and let his other siblings coral Touya’s gang. But since he wasn’t entirely heartless, the red and white hair alpha would do the next best thing and find someone to look after his favorite kouhai (and he was never ashamed to admit it, Shouto had actually said that to the gathered first years two years ago a week into their interval training) who was unlikely to get him drunk and use him as a cumdump for shits and giggles.

The answer ends up being just a couple of halls down and sitting in a dark corner with a scowl on his face.

“Ah, Bakugou the person I least wanted to see,” Shouto deadpanned. The slim alpha had steered Izuku towards couches near the bay windows in the back of the mansion. “How about you do something productive for once and look after Midoriya for me, would you?”

“Fuck off, Icy Hot,” the other alpha sneered, although he didn’t reject Izuku’s presence outright when Shouto pushed the omega to sit down. “What’s with the nerd here?”

Shouto shrugs, attention already elsewhere. “Just wanted to keep a dear kouhai out of the hands of my brother’s friends. You seem like a good enough deterrent for an asshole.”

The alpha snorted, “Fine, fine, I can watch one wimp while you do something worthwhile with your boy toy. Maybe he can pull that stick out of your ass.”

“I’m fairly sure it would be more accurate to say my ‘boy toy’ will be putting something up it, but go off,” Shouto quips in his same deadpan way, earning a surprised squeak from Izuku at his crassness. College had done things to his previously mild mannered senpai! The bantering between the two alphas went on for a bit before Shouto left with a smile and nod to the two, blending into the crowd in moments and leaving Izuku alone with this new person.

Izuku stared at the alpha, this Bakugou, blush still prominent in his features as he takes a drink from his plastic cup. “Want one?” the man offers, to which Izuku shook his head. “Smart kid.” That little bit of praise makes something warm pool in the pit of Izuku’s stomach and he almost missed the light-haired alpha flag someone down. “Oi, Shitty Hair! Get me one of my specials!”

Someone in the nearby group of dancers gives a thumbs up.

Okay… Are they really going to just sit here, looking at each other without talking to each other? They didn’t seem to have anything in common other than possibly a mutual friend in one Todoroki Shouto (possible friend? Izuku wasn’t sure if the exchange he witnessed was friendship or antagonism or frenemies) and being at this party. But it would be awkward to just not talk at all, especially when Todoroki-kun, in his own special way, thought they might be able to hit it off, but it was hard to break the silence and-

“Well, it hasn’t been silent since you started muttering,” Bakugou responded, taking another sip of his drink.

Izuku flushed hotly, not realizing he had started talking. “S-sorry Bakugou-san!”

The alpha waved him off, “S’fine, dweeb. You had questions?”

Izuku definitely had some, but the first thing that came out of his mouth was “Are you a fan of the Adventures of All Might?”

“What makes you think that?” Bakugou gave a non-answer, taking another sip.

The answer, to Izuku, was obvious – the man’s costume was an obvious homage to Bakusatsuo, a vigilante that often times teamed up not just with the title character, but also Green Rabbit, who he had an on again, off again rivalry and relationship with and –

AAAAND Izuku realized he had said all that out loud again.

This got a laugh out of the alpha. “Oh caught on did you? That’s probably why Icy Hot thought it would be fine. We got at least a love of nerd comics to commiserate on.” 

“There’s nothing pitiable about liking The Adventures of All Might – it’s one of the best shounen series of the decade!”

The two bicker good naturedly for a bit over the most recent chapters before the man from earlier returned with a number of red plastic cups. “For you, Bakubro and friend!” he chirped, handing two of the cups to Bakugou before heading back into the throng of dancers, his own in hand.

Izuku blinked in surprise when the older alpha suddenly tried to hand him one. “I don’t drink,” he reminded, a frown touching his features.

“Trust me, you’ll like this,” Bakugou pushed the plastic cup into his hand and Izuku had to catch it or whatever a Bakugou Special was would spill all over his cosplay… Except… Izuku looked down into the cup when he realized that it didn’t feel like a drink was inside. Instead, it was filled with a party mix of dried foods like pretzels and dried fruit.

Bakugou shook his own cup and Izuku could hear the distinct sound of trail mix hitting the sides. “You know the first rules about parties – don’t drink, and sure as fuck don’t take any drink that you didn’t grab or pour yourself or one that you put down. But here’s a lesson: people are less likely to try and ply you if you got a cup in hand. But that doesn’t mean it’s gotta be a liquid.”

“By that logic, I shouldn’t be taking a cup from you, even if it’s just trail mix.” Izuku quipped.

That got a bark of laughter from the alpha. “Yeah, yeah, we’ll make the one exception for the night. If only because I’d fear that you’d get your punk ass lost trying to find the snack tables.”

Izuku didn’t comment that he, indeed, got lost trying to find refreshments and had decided he would probably just raid Todoroki’s kitchen when he found it or grab something from a conbini on his way back home after the party.

“Any other words of wisdom for a high school student, oh, elderly college-senpai?”

They continued talking, Izuku curled up on the couch and leaning into Bakugou’s personal space. The alpha didn’t mind, regaling the omega with stories from Yuuei University and the antics his classmates got up to, one arm draped across the back of the couch behind Izuku’s head, the other alternating between gesticulating as Bakugou made a point and resting against their legs, fingertips trailing across his skin. Izuku didn’t even notice the hand near his thigh until Bakugou stopped talking and flushed. The older alpha made to move his gloved hand away, only to be caught by Izuku’s. 

The right thing to do would be to pull away, to smile in understanding and allow the alpha to put distance between them and pretend nothing had happened. But Izuku, for all his faults with overthinking, firmly believed in following his instincts. And everything in him said that he definitely welcomed the touch. So instead Izuku shifted closer, leaning into Bakugou’s space and looking up at the alpha with adoring eyes, even as their hands linked together.

“Little forward there, aren’t you?” he whispered, face so close that Izuku could finally tell the man had blond hair.

“I can be more forward if you want,” was Izuku’s cheeky reply.

The answering laugh made Izuku melt into Bakugou, eyes going half lidded at the alpha’s caramel and campfire scent. Izuku didn’t even realize he was releasing his own summer sweet pheromones until Bakugou growled low in his throat. The sound makes Izuku shiver and nearly start slicking. “You really wanna do more Midoriya?”

There’s no hesitation, no waffling, just a fervid “Yes!” in answer.

Bakugou wasted no time, picking the omega up and getting off the couch. The two ignored the wolf whistles from the other party goers, more intent on heading further into the Todoroki mansion and finding a room with no one else inside. The first few rooms were a bust, either locked or, when opened, revealed other half drunken couples. When the fifth door Bakugou opened revealed a bathroom (serviceable, but by unspoken agreement, neither of them wanted to keep people out if they needed to take a piss), Izuku hissed and urged to be let down.

“I’ve got an idea,” the omega explained, keeping his hand linked to the alpha as he led him further in. Izuku had only been to the Todoroki’s home a handful of times when he and Shouto were in school together, but he still remembered the way to the library. The door, of course, was locked.

“We probably passed by open rooms on our way Midoriya.”

Izuku laughed, “Trust me, you’ll like this one though.” While locked, there was was a spare key hidden in one of the door panels, all he had to do was – “Ah ha!” Jiggling one of the frames made the key drop down and Izuku used it to open the door.

Bakugou gave an excited inhale as the library was revealed in all its splendor, two stories of books with comfortable couches spread around. Izuku closed the door and pocketed the key, locking it for good measure. “No one should bother us he-ERE-”

The last part ended in a yelp as the omega was picked up and twirled around to Bakugou’s amusement. Lips met his and they kissed. Maybe it was because the alpha was older, maybe alphas just kissed differently than betas and omegas do, but Izuku was left breathless in a way he had never been before. Their breath mingled for a bit, hands roaming down torsos as they kissed again, again, and again, before Bakugou pulled back a bit, looking into Izuku’s eyes through the gloom of the darkened library. “Couch?”

Izuku nodded earnestly and was surprised as Bakugou repositioned his arms and hands so he could carry the omega to the nearest couch. The moment his back hit the leather, Izuku stared up at Bakugou, “How do you want me?”

“Wanna see you come undone,” the alpha growled, caressing the exposed skin between Izuku’s thigh highs and bodice, grinning as Izuku gave a shuddery moan at the contact. “I wonder, can I fuck you in full cosplay like this?”

That might be a big of a kink of mine , Izuku thought even as he pulled Bakugou down for a kiss, enjoying the feeling of the alpha between his legs. 

He felt the older man’s hands trail up, running over his ass and snapping at the spandex material of his suit and enjoying the hiss that escaped Izuku. Nimble fingers played against the slicked fabric, and Izuku could hear how Bakugou took great breaths of his scent. “Gods, fuck you smell so fucking good,” the alpha groaned, pulling away a bit to shimmy lower so his face was closer to Izuku’s bottom half. “Can’t wait to fucking eat you up,” and with those words, he was pulling the fabric to the side, straining it as far as it so he could see the omega’s pretty hole, glistening with slick and arousal. Bakugou grinned, peppering kisses against Izuku’s thighs, absolutely revelling in the omega’s pretty little gasps and whimpers. Fingers brush against Izuku’s cock as Bakugou licked and sucked Izuku, enjoying the omega’s slick as the omega shudders and mewls in pleasure. Soon enough, the alpha tore at the bottom of Izuku’s costume, giving himself more room to start fingering the omega. Everything Bakugou did made Izuku sing out, wanting more. He didn’t even notice as he started babbling, asking for more, for Bakugou to fill him so fucking good .

“Fuck,” Bakugou hissed, as he wiped at his lips. Izuku opened his eyes, giving the alpha a questioning look. The blond was at least as half disheveled as Izuku felt himself, shirt and harnesses rumpled, his pants half opened and allowing the teen to see his hard cock. 

Bakugou gave him a look but went to the desk just a few yards away, rummaging in the drawers, “How the fuck do you know that?”

“Senpai used to complain in the past that Todoroki-san was… very bad about being with his lover in here. Not to mention he and Inasa-san had made use of it at least twice.” Those had been awkward conversations in his first year, Izuku would admit, but seeing Bakugou crow in triumph upon finding lube was worth it.

The alpha came back, already opening the bottle. “No condoms though, so I’ll be sure to pull out.” he promised.

“I mean, is there any danger that I’m going to need to have antibiotics later on?”

“I’m clean!” The alpha was almost offended at the very thought that he would give his partner something.

“Then it’s fine,” Izuku responded, biting his bottom lip. “I want your knot.”

How was a virile twenty year old alpha supposed to resist that declaration?

Spoiler alert: he couldn’t.

It almost happens too fast, Bakugou leaned claimed Izuku’s mouth in a bruising, pleasurable kiss, as his other hand lubed up his cock. The two shift against each other, rutting until they find the perfect angle for Bakugou to sink in. Izuku hissed at the stretch, loving every moment.

They slow down, Bakugou nudging his hips to allow himself to part Izuku inch by excruciatingly pleasurable inch until it was almost all in, save for his quickly swelling knot. The alpha waited, staring down at Izuku until the omega gave him a small smile and nod. With his permission, Bakugou moved, pulling almost all his cock out of the omega’s tight hole, and then plunged back in. Izuku’s pleasured cries spurred him on, Bakugou setting a punishing pace as they both 

The feeling of a knot swelling within him was too much for Izuku, the teen coming, his cock spurting between their bodies as more slick ran down his thighs. Bakugou growled, rutting up even more as his knot inflates fully, cumming as the two were locked together.

They spend some time just catching their breath, breathing in their mingled scents.

“Heh, ready for round two?” Bakugou gasped between bruising kisses at his neck.

Izuku chuckled, “You better be the moment your knot deflates enough for you to fuck me again.”

---

Denki hissed as he tried room after room, in search of his best friend. The blond omega had woken up, disheveled and very sated, curled up against his beta boyfriend. It was perfect until Ochako pounded against the door and asking if he had seen Deku. This had spurred Denki into frantic energy, giving his boyfriend a kiss on the brow (“Seriously, no morning sex?” “Sorry hun, I’ll make it up to you later.”) before getting out of bed that they had commandeered the night before. He didn’t bother with finding a shirt, just grabbed the first pants he found, despite being bigger around the waist than he needed, and was out of the room.

So maybe he was a shitty friend, but the idea of previous Izuku alone, possibly with some scumbag alpha made a shiver of unease run down his spine. They had promised Mama Midoriya that they were going to be safe! Just hanging out with school friends – which wasn’t exactly wrong, just… They didn’t mention how many of those school friends were older than they were.

“Have you seen Todoroki-senpai?” Denki asked. Ochako looked like she had just as good a night as he had, hickies obvious against the pale throat and gait a little wobbly, but the worry for their friend was obvious on her features.

“Not yet. Kirishima-san and Ashido-san tried to wake him up but he’s still out like a light.”

There… was a lot of questions to unpack there – Ochako, getting Yuuei’s power couple? Denki needed the fucking deets – but it could wait until after they found their Deku. For now, Denki focused on trying to figure out where Izuku might have gone. The green haired omega had been to the Todoroki home more times that he had, and every time he had been there they spent most of the time – “That’s it! The library!”

Where else would the omega go other than to be a nerd with his books. 

“Might as well try it, I’ve gone through like every bedroom in the other wing,” Ochako replied with a shrug, already walking down the hall in that direction.

Denki tried the door but no dice, it was locked solid. He started looking for the hidden key but after a few minutes of fumbling, Ochako gave a sigh of exasperation. The beta pulled a bobby pin from the back of her hair, kneeled so she was eye level with the door knob and worked her magic, opening the door with relative ease.

The first thing that hits them was the smell of coupling, heat and musk, tinged with a number of familiar scents that Denki couldn’t place right away. One of them was obviously Izuku but the other… 

“Deku!” Ochako’s exclamation of surprise made Denki snap into focus. His friend was peacefully sleeping on the broad chest of an alpha, green hair fanning over the other man’s skin, a throw blanket pulled on top of them for both warmth and to preserve their modesty.  His eyes trailed to the face of the alpha, only to recognize the dark red eyes that were glaring at the two of them.

“Nii-chan‽”

This… was not how he expected to introduce his best friends to his older brother. At all. But at least it seemed that his best bro will probably get along great with his big bro?