Chapter Text
“Help!”
Red Riot springs into action. Rounding the corner, he sees a guy taking off with an older lady’s purse. As soon as she sees him, she points toward the man.
“He took my purse!”
Kirishima nods and takes off after the guy. Though he’s not the fastest there is, his training with his best friend has definitely helped him with his agility, enough that he begins to catch up with the purse-snatcher. Had his roommate Dynamight been on patrol, this probably would have taken seconds, but the redhead is much more known for his strength and durability than his speed.
He is clever, though, bulking form disappearing down an alley as he sees the man round a different corner. The pro hero knows the city like the back of his hand, and cornering his target is a piece of cake. Like herding sheep, he manages to trap the thief in a closed off alley, blocking the only exit. He takes a few steps forward before crossing his arms and frowning. Kirishima had put on inches upon inches as he got older, creating this intimidating brick wall of a man that now looms over this cowering scrawny thief.
“Purse snatching from an old lady is so unmanly. Hand it over.”
He holds out his hand and the guy tosses the purse and tries to take off. Unfortunately for him, training with Bakugo had ensured the redhead’s reflexes were quick enough for him to catch the purse with one hand and grab his collar with the other, effectively ruining his escape. Red Riot sighs and shakes his head while the man struggles in his hold.
“So unmanly.”
Kirishima radios to the nearby station and carries the guy out by his collar like he picked up an angry cat by the scruff. He hands him off to the cops who smile at him and thank him for his hard work. Red Riot provides his signature sunshine smile and thumps his knuckles together, albeit lightly as he’s still holding the lady’s purse and doesn’t want to accidentally break anything in it. He quickly turns to find the lady a few steps away, a limp in her step. He hands out her purse and she gratefully accepts it.
“Thank you so much, Red Riot! My wallet and everything is in here, I don’t know what I’d do if it was taken.”
The lady reaches out to pat the hero on the arm, grabbing on when she stumbles slightly. The redhead smiles and bends a bit to help balance her, bringing them closer to eye level.
“That’s why we heroes are here! I noticed you were limping, though, is everything okay? I can take you to the hospital if you would like.”
The lady shakes her head and chuckles.
“Oh, no no, I’m perfectly alright! I would like to reward you for helping me, though.”
Kirishima flushes a little, shaking his head and his free hand.
“No no! You don’t have to! This is my job, and honestly, seeing citizens like you happy and safe is all I need!”
The lady leans forward, pulling the redhead down.
“It’s no trouble at all! It’s already done!”
Confused, Red Riot’s brows furrow as the lady chuckles. She pulls on his arm and goes on her toes to speak quietly in his ear.
“My quirk lasts for 24 hours. It’s not harmful at all. Enjoy yourself!”
There’s a glint in her eye before she smiles politely and pats his cheek. She let’s go of his arm and starts hobbling away, leaving Kirishima stunned in the middle of the road. He’s shaken out of his confusion when an officer calls to him. He’ll worry about it later, he still has a job to do.
A few minutes after this incident, Kirishima notices something strange. A small black circle appeared before him, starting at about the size of a dime. He’s asked coworkers and sidekicks what they think it is, but discovered that none of them can see it. Strange. The redhead is pretty confident this is the quirk from the older lady.
But, she was so kind, and she said it wasn’t harmful, so he’s inclined to believe her. Throughout the day it grew more in size, stopping at about the size of a small side plate. It was just a floating black circle, not really a sphere. It was flat, but it didn’t do anything when people unknowingly walked through it or he poked it. It was actually kind of squishy, and he was caught poking at it when his roommate made an appearance in his office.
“Shitty hair.”
Kirishima jumps like a child caught with his hand in a cookie jar. He turns to his best friend sheepishly.
“H-Hey Bakugo! How’s it going? Is it already time for your shift?”
Rather than growing in height, Bakugo had filled out more, training more for agility than defense like Kirishima. Dynamight stands maybe a head shorter than the sturdy hero with a small waist and lean figure, built for power and speed. Said man stands in front of the redhead’s desk, his usual grouchy expression a little off with a flush of his cheeks. He frowns more as he analyzes his roommate.
“What are you doing? Why is there a black circle in front of you?”
Kirishima jumps up from his seat, eyes wide, startling Bakugo.
“YOU CAN /SEE/ IT?”
The blond contorts his face in confusion.
“What do you mean? Did you get quirked?”
The redhead nods, confused as he contemplates.
“No one else can see it, I thought the quirk would only affect me, but you can see it too?”
Bakugo shakes his head.
“Why didn’t you report it?”
Kirishima shrugged.
“It’s harmless and it lasts 24 hours.”
Bakugo raises a brow and crosses his arms.
“And how do you know that?”
Kirishima smiles.
“I helped an old lady from a purse snatcher, and she said she’d reward me? She used her quirk and said it’s harmless and only lasts 24 hours.”
The blond hero huffs.
“And you believed her?”
The redhead chuckles.
“She was really nice! And nothing has happened yet, so I think it’s fine.”
The blond rolls his eyes. He’ll never understand how Kirishima can be so trusting, but he’s also a sunshine incarnate and every citizen loves him. Bakugo himself has many fans, but he’s seen a lot of articles on his personality throughout the years, and he still does, even though he’s mellowed out considerably. He’s come to terms about not being the most liked, but that won’t stop him from trying to be the best hero.
What he couldn’t come to terms with, though, was how much his best friend has changed over the years. He grew so much, is extremely ripped, a force to reckon with. He’s so kind that it is impossible for anyone to hate him. Yet, when he goes Unbreakable, he is terrifying. He could rip people to shreds /easily/ if he wanted to. Villains cower before his intensity, and it makes Bakugo wonder just what it would feel like to have that look directed at him.
He shakes himself out of his thoughts, shifting his pants a bit to hide his half-chub. Now isn’t the time, he just got into the office, though he has a short shift today, that’s no excuse. He has had a crush on Kirishima for the last few years, finally being able to understand all his confusing emotions near the end of their school days. They moved in together, created an agency together, and rose their ranks while growing into themselves. Life was good, and he’d be damned if he lost Kirishima due to his own shitty feelings.
Looking at the weird circle, though, has him curious.
“When did this happen?”
“Hmm… Maybe around like 10 am?”
Bakugo frowns, remembering back to his morning, and feeling something strange, though he’s not sure what it was.
“What does it do?”
Kirishima shrugs.
“I have no idea. I was gonna figure that out after work, or just leave it alone. It was a nice gesture, but I don’t know…”
Bakugo hums in thought.
“You’re done now, so if you figure it out, let me know. I’m curious.”
Kirishima nods.
“Sure! Be safe on patrol! Should I get stuff for dinner?”
Bakugo nods.
“I sent you a list already.”
The redhead checks his phone.
“Got it.”
Bakugo leaves to get ready for patrol. Kirishima packs up his stuff and takes off, making a quick stop at the market before putting away everything in the kitchen in their shared apartment. Kirishima sighs in relief before going to his room and locking himself in. He sheds his clothes and jumps into the shower to wash off the grime of his day. The red hero throws on baggy sweatpants, ties his hair up in a sloppy ponytail and collapses on his bed. After a moment of silence with his eyes closed, he peeks up to see the circle just there. He huffs.
“Just what are you?”
He reaches up and gently pokes the circle, seeing the tip of his finger disappearing slightly as he prods something soft and bouncy. Strangely though, it’s also quite /warm/. Sliding his finger across, it slides into a divot, and he adds a few more fingers to feel around.
Cheeks pink, he pulls his hand back quickly, staring intently at his hand, noticing nothing on it. What he felt… it felt like an /ass/. A supple pliant /ass/, and Kirishima doesn’t know what to make of it. Just /what/ was this lady’s quirk? She did say it was a gift, and that it was harmless. But the glint in her eyes… Kirishima’s face flames as he thinks. Did she make a /fleshlight/? That’s absolutely absurd, she was such a nice old lady. The redhead stares at the circle as if it can give him answers.
Maybe, maybe just one more touch, it couldn’t hurt. His hand goes into the circle, and he cups the object, giving it a squeeze. Yup, that is /definitely/ an ass. A very round and plump ass. The thought makes Kirishima involuntarily moan. It’s been awhile since he last got off, and just /feeling/ this is enough to have his dick swelling in his sweatpants.
He thinks about how no one could see the circle but Bakugo. He wonders what that could mean. He really shouldn’t, he knows he shouldn’t, but he can’t help but to think about his long lasting crush on the man. Ever since second year, he’s been so in love but so /afraid/ to tell him, afraid of ruining what they have. He was so happy Bakugo accepted his suggestion of getting an apartment together. They even started an agency together. It was more than Kirishima could ever hope to have. And though it’s so wrong, he just can’t help but to think of the ass he’s currently groping to be that of Bakugo’s. /God/ does he wish it was.
He palms himself in his sweatpants, groaning at the friction. His roommate wasn’t going to be home for awhile, he guesses now is as good a time as any to get off. Since the lady said this isn’t harmful, it’s probably just a fleshlight. Well… Fuck it, Kirishima supposes he will use his gift, indulging in his fantasy just this once. He sighs, he’s lying to himself, he really needs to stop fantasizing about Bakugo, but he just can’t help it. Later… later he’ll definitely move on…
His thoughts fall away as he leans in close to try to see through the floating circle, completely failing. Yet, his hand touches what seems like warm skin inches from his face. How fascinating. He squeezes a cheek briefly before sliding his thumb down the crack, pausing at the rim. He brushes over it lightly, feeling a small vibration he imagines is a shiver down Katsuki’s spine.
He rubs at his erection through the fabric, picturing what he imagines the blond’s plump ass looks like through the circle. He can almost imagine the black circle blending into the black fabric of Dynamight’s hero outfit, form fitting enough for everyone to see just how nice an ass he has. /God/, how much he wishes he could taste that ass.
The redhead caves with a groan, leaning in and swiping his tongue up the crease between cheeks, coming back to lap at the rim like a starved man. He uses the hand in the circle to pull the cheek to the side to give himself more room. His free hand on his sweats limp and forgotten as he starts playing with the rim more, giving it the attention it deserves.
After what was probably too much time, he finally pushes his thick muscle through the tight ring of muscle. He moans as he wholeheartedly starts tongue-fucking the hole, imagining his crush squirming and mewling as he pulls an orgasm out of him. The thought alone has his free hand sliding down the front of his sweats to grip the base of his cock to stop himself from cumming on the spot.
Kirishima’s head is spinning from his thoughts. What would he /sound/ like? Would he grunt and groan in his usual gruff voice or would he sound like a whole different person? The redhead decides he doesn’t matter either way, as long as it’s him.
He wonders if Bakugo would let him eat him out like this, let him pleasure him till he comes undone, or if he’d take initiative and eat Kirishima out, determined to be the best at it as usual. The redhead’s ass clenches at the thought, and his mind blanks as he focuses on not cumming. He’s determined to make his first load be in this gift, his imagination not helping by placing the grouchy blond on his back, debauched express across his features.
Kirishima pulls back, wiping his face briefly before shucking off his pants quickly, underwear not being an issue since he hadn’t bothered after his shower. Reaching across his bed to his nightstand, he quickly throws open a drawer and blindly grabs his lube. Uncapping the bottle, he squeezes a little too much out onto his hand before tossing the bottle aside. He reaches back into the circle gently and gives a cheek a squeeze before sliding a finger in easily. His tongue had opened it up enough for this to be an easy slide, yet it still feels tight. That on top of the warmth has Kirishima drooling, wondering how good that’s going to feel on his dick.
The redhead slowly adds fingers, pumping and scissoring them for long periods of time, thoroughly enjoying the process of prepping. His brain once again goes back to the blond, wondering if he would like the long prep or if he’d be too impatient. Kirishima knows he’s a big man, in stature and dick size. Knowing how small Bakugo is, the thought of how tight he would be has him pulling out his fingers. He had gotten to four fingers, and with how thick his fingers are, he figured it would be enough for his dick.
He shifts to his knees, the circle being at perfect height for his cock. He grabs the base of his cock and starts to slowly guide his tip into the circle. He pictures the blond sprawled out on his knees in front of him, ass in the air. Kirishima moans as his tip pops through the ring of muscle, taking a moment to breathe before slowly pushing it in. He watches in amazement as his dick slowly disappears into the circle, yet it feels so real and warm and /perfect/. It’s so /easy/ for him to imagine his best friend there, moaning with him as his hole greedily takes his dick.
He starts to slowly rock himself before picking up the pace, thoroughly enjoying his gift. He imagines all sorts of positions he could possibly have Bakugo in, and each new thought has him picking up the pace. He imagines how Bakugo is never the kind of person to just /take it/, and how he would give as good as he got. The man would absolutely /ruin/ him in bed, and Kirishima would accept all of it without hesitation. He starts sweating, thoughts starting to leave his brain as it starts a chant of “Bakugo… Bakugo… Bakugo…” in time with his increasing thrusts.
Kirishima hammers into the hole, pace quickening as he starts to feel the heat gather in his lower abdomen. He thinks of Bakugo when he comes home from work, breathing heavily from exhaustion and covered in sweat, and uses that to imagine him panting, covered in a sheen of sweat. That’s what sends him over the edge, hips stuttering and balls pulling up as he moans through his release, painting the insides white. He takes a moment to recover, grinding slowly as his vision comes back before he pulls out with a groan, collapsing back onto the bed behind him.
After a few minutes of pure bliss, his brain restarts and he takes a look at the clock. Looks like he still has a few hours before Bakugo comes home. He’ll get some water and a quick snack before he goes again.
He pushes himself off the bed and throws on his sweatpants and makes a beeline for the fridge. He pours a glass of water and starts drinking when a loud /BANG/ rings out from the door. Trained to fight villains at the drop of a dime, Kirishima jumps out of the kitchen to see an unusually flushed and extremely frazzled Bakugo in the entrance. The blond slams the door shut behind him and drops his half-closed duffle bag on the floor before aiming his anger at his best friend.
“EIJIRO KIRISHIMA!”