Mirko, the Cosplay Slut (MHA AU)

"Loud Cosplaying Noises"

You knock on her door—firm, annoyed. The music, the stomping, the occasional thud against the wall... it’s been going on for hours. You’re ready to complain.

The door swings open.

Rumi Usagiyama—Mirko—stands there, flushed from movement, dressed in a cropped tank that clings to her toned frame and low-slung shorts that reveal the soft flick of a fluffy white tail. Her long rabbit ears twitch, one flopping lazily over her shoulder, the other perked toward you like it’s listening for your heartbeat.

She leans against the doorframe, one hip cocked, her grin slow and deliberate.

“Well hey, neighbor. You here to yell at me, or just hoping I’d open the door looking like this?”

You blink. The words you rehearsed vanish. Her presence is magnetic—those ears aren’t costume fluff, they move, responding to sound and mood. Her tail flicks again, and you realize you’re staring.

“Ah. That look. You didn’t know, huh?” She steps closer, voice dropping to a teasing murmur. “They’re real. Born with ’em. Soft, sensitive, and very distracting, apparently.”

She turns slightly, letting you see the full curve of her ass and her cute tail tail, then flicks one ear toward you like a challenge.

“I was rehearsing a con routine. Combat choreography. You know—kicks, flips, dramatic landings. Sorry if I shook your ceiling. Or... maybe you liked it.”

She tilts her head, ears perked, tail swaying.

“So what’s it gonna be? You wanna scold me, or step inside and see what I was practicing? I promise it’s quieter now. Unless you make me laugh.”

She holds the door open, eyes locked on yours, one ear twitching like it’s reading your hesitation. Her voice softens, just enough to make your pulse skip.

“Or maybe you’re not here to complain at all. Maybe you just wanted to see what I look like when I’m not performing.”

She steps back, inviting you in with a flick of her tail and a glance that lingers.

"She Wants 2B the Sexiest Cosplayer Around"

The convention hall was a roaring, neon-lit labyrinth of thousands of buzzing fans, but near Booth 14, the air practically hummed with an entirely different kind of energy. Rumi leaned casually against the edge of her display table, a thick roll of EVA foam tucked under one arm, looking effortlessly at home amidst the organized chaos of her independent studio space.

True to form, she had completely thrown herself into the craft. Today, she was rocking a meticulously tailored, jet-black bodysuit that hugged her powerfully musked, athletic physique with zero room for error—her heavy, muscular thighs and broad hips flexing slightly as she shifted her weight, perfectly balanced by her remarkably prominent bust and the full, rounded sweep of her massive ass beneath the sleek fabric. Two twitching, oversized white rabbit ears fastened to a headband bounced with every sharp turn of her head, anchoring the look.

Right now, she wasn't Rumi the retired pro hero; she was bringing 2B from Nier: Automata to life with a swagger that demanded every eye in the aisle. "Alright, look," Rumi called out over the dull roar of the crowd, flashing a sharp, confident grin at the line of photographers and wide-eyed fans starting to block the walkway. "If you're here for autographs, the prints are on the left. But if you're looking for that stage combat workshop sign-up, you better not trip over your own feet like the last guy. Who's next?"

"Wonder Woman to the Rescue!"

The ring light buzzed softly in the corner of the small, meticulously organized studio, casting a bright, unforgiving glow over the streaming setup. Rumi adjusted the heavy belt resting on her hips, checking her reflection in the monitor one last time before glancing up at the rising viewer count ticking upward by the hundreds.

For today's stream, she had decided to skip the heavy EVA foam armor entirely, opting for a tactical, stream-friendly take on the Amazonian princess. She was clad in a striking, metallic gold-trimmed red bikini top and matching star-spangled bottoms that left zero doubt about her rigorous training regimen—her powerfully sculpted, athletic physique was on full display, showcasing broad hips, thick, muscular thighs, and a remarkably prominent bust and massive ass that framed her silhouette as she leaned comfortably toward the camera. A golden tiara sat rakishly against her white hair, holding down her long, twitching rabbit ears which flicked back and forth with every notification alert.

"Alright, chat, calm down in the requests," Rumi laughed, her voice rich and carrying that characteristic, take-no-prisoners edge as she stretched her arms overhead, pulling off a brief, effortless pose that immediately sent the chat feed into a blinding blur of scrolling emotes.

Looking straight down the lens, she felt like Wonder Woman herself in this bikini cosplay, flashing a sharp, challenge-filled grin. "No, I'm not doing a live deadlift challenge in this outfit today, Dave, so stop asking. We're doing a rapid-fire Q&A on contact cement techniques, and then I'm showing you guys how to properly seal a high-density foam prop without cracking it. Drop your questions in the chat—let's go."

"Deadpool's New Neighbor"

The dull thud of the last moving box hitting the floor was the sweetest sound you’d heard all day. After hours of wrestling with furniture and drowning in bubble wrap, you finally dropped onto the edge of the couch, ready to enjoy the absolute silence of your new apartment.

Then, a sharp, persistent knock echoed from your front door.

Groaning softly, you dragged yourself up and pulled the door open, expecting a landlord or a stray piece of junk mail. Instead, your brain completely short-circuited.

Standing in the hallway was Rumi, leaning casually against the doorframe with a wicked grin plastered across her face. She was technically wearing her Deadpool costume, but a closer, jaw-dropping look revealed that every single inch of the iconic red-and-black suit—from the faux-leather textures to the tactical pouches and chest straps—was painstakingly painted directly onto her skin. She was completely, breathtakingly naked.

The intricate body paint clung seamlessly to her aggressively muscular, athletic frame, accentuating every heavy, natural curve of her massive tits, the sharp definition of her abs, her broad hips, and the sheer, undeniable magnitude of her huge ass as she shifted her weight. Two fluffy, painted-on bunny ears twitched playfully against her stark white hair as she looked you up and down with laughing red eyes.

"Hey there, neighbor," Rumi purred, her husky voice dripping with amusement as she crossed her arms, inadvertently pushing her heavy cleavage together. "Thought I’d swing by and welcome the new guy to the building. Hope I'm not interrupting anything heavy—figured naked delivery was the best way to make a lasting first impression."

"Cammy White is a Naughty Bunny"

The midday sun beat down hard on the open-air pavilion outside the convention center, but the dense crowd gathered around the open-air stage wasn't paying any attention to the heat. They were completely captivated.

Rumi stood center-stage, holding the microphone with a loose, relaxed grip as she let out an easy, infectious laugh that immediately drew a wave of cheers from the audience. She wasn't just posing; she was radiating pure, magnetic charm, playing off the energy of the front row with a warm, knowing wink that had half the room melting on the spot.

She was bringing Cammy White from Street Fighter to life in a way that blended raw physical confidence with playful sensuality. The vibrant green leotard hugged every contour of her powerhouse frame—her broad hips, thick, muscular thighs, and remarkably prominent bust and massive ass curving smoothly under the sleek fabric as she shifted her weight with dancer-like grace. Her long, twitching white rabbit ears swayed gently behind the red beret, perfectly complementing the sultry, inviting smile playing across her lips.

"Relax, you guys look too nervous out there," Rumi teased, her voice dropping into a smooth, teasing register as she stepped right to the edge of the stage, resting one gloved hand on her hip. "Come on, a few of you raised your hands for the stage combat demo. Who’s brave enough to come up here and try to keep up with me?"

"Power Girl and Powerful Teasing"

The humid, electric air of the convention center floor hummed with the collective energy of thousands, but the epicenter of the noise was unmistakably Booth 402. Rumi leaned casually against the edge of her display table, arms crossed over her chest as the heavy fabric of her custom bodysuit strained slightly against her generous curves. Even without her hero license, she commanded the room effortlessly; her toned, muscular frame and thick, athletic build turned heads the second anyone walked down the aisle.

Today, she had decided to break out her Power Girl build, the stark white fabric of the leotard fitting snugly over her broad hips and massive chest, complete with the signature window cutout that she wore with a confident, teasing smirk.

A young fan nervously approached the table, clutching a stack of prints and holding out a sharpie. Rumi's sharp red eyes flicked up, softening just a fraction before a wide, charismatic grin split her face.

"Well, look who made it through the gauntlet," she chuckled, her voice carrying a husky, playful warmth that instantly eased the tension. She pushed off the table, the subtle sway of her heavy hips drawing a few appreciative glances from the passing crowd. Reaching out to snatch the marker, she leaned in close across the counter, her substantial presence completely filling the space. "Digging the outfit, or are you just here to make sure I don't break another table during the afternoon stunt showcase?"

"Doing Helen Parr Justice"

The backstage corridor of the convention hall was usually a quiet escape from the roaring crowds, but tonight, it was the site of a very specific, high-stakes prize claim.

Rumi has set a little contest. And whoever wins gets to smack her ass in front of everyone. And for your luck, you won!

She stood casually against the concrete-block wall, her body molded entirely in a gleaming latex Elastigirl suit that clung mercilessly to every single line of her athletic, muscular frame.

With her hands braced flat against the brick, she leaned forward and intentionally arched her back, letting the skintight material accentuate her massive thighs, wide hips, and impossibly large ass in front of the small, buzzing audience of fellow creators and staff gathered to watch the payoff. The latex squeaked softly as she shifted her weight, flashing a sharp, confident over-the-shoulder smirk at the winner standing a few feet away.

"Alright, champ, the spotlight is all yours," Rumi called out, her voice dripping with playful bravado as she tapped a booted foot against the floor. "You earned the bragging rights, so let's see what you've got. Don't pull your punches—let's hear how it echoes down the hall."

"Tatsumaki's Date"

The dim, warm lighting of the upscale restaurant felt a little worlds away from the loud, chaotic energy of the convention floor, but Rumi wore the transition just as easily as she wore any of her custom builds. Tonight, she had opted for a slightly more understated look off-stage, though she couldn't resist putting her own spin on the ensemble: she was fully leaned into her Tatsumaki cosplay, the sleek black dress hugging her athletic waist, broad hips, and heavy chest with effortless confidence, complemented by her signature emerald green hair.

As you both slid into the plush booth by the corner, Rumi kicked one leg over the other, resting her chin lazily in her palm as she scanned the leather-bound menu with a critical eye. Despite the sophisticated, quiet ambiance of the place, her muscular, imposing presence and natural charisma instantly commanded the table, turning a few curious heads from across the dining room.

She tossed the menu onto the table with a soft clatter, flashing a sharp, wicked grin across the candlelit barrier between you.

"Alright, I'll admit, the ambiance is nice, but I'm running on pure adrenaline and protein bars since the morning panel," Rumi chuckled, her husky voice cutting through the quiet murmur of the restaurant with playful warmth. "So, let's skip the small talk. Are we ordering half the menu to fuel up, or are you going to let me steal whatever looks best off your plate?"

"Post Convention Bathing"

The heavy, hollow thud of the convention center locking down for the night echoed faintly through the walls, but inside the quiet sanctuary of the green room, the only sound was the steady, soothing rush of hot water from the shower.

Rumi stood beneath the spray with her eyes closed, letting the scalding water wash away hours of face paint, heavy hairspray, and the lingering exhaustion of a grueling twelve-hour day on the floor. Stripped of her elaborate gear, her muscular, athletic frame looked even more striking under the harsh overhead lights—broad shoulders tapering down to a narrow waist, wide, powerful hips, and heavy, perfectly sculpted thighs. The water slicked over her skin, tracing the heavy swell of her large breasts and prominent nipples before pooling around her toned legs, and cascading down the curve of her massive, sore rear end as she leaned a heavy hand against the tiled wall.

A long, deeply satisfied exhale slipped past her lips as the tension finally melted out of her spine. She tilted her head back, letting the water hit her face, thoroughly enjoying the rare, uninterrupted silence of being entirely alone with her thoughts.

"Nami's Wardrobe Malfunction"

The final stunt routine of the afternoon showcase had the crowd roaring, and Rumi was riding high on the absolute peak of adrenaline. Dressed in her custom Nami pirate outfit—complete with the iconic orange wig, patterned top, and form-fitting orange skirt that hugged her muscular thighs and wide hips—she stood center-stage, arms raised to soak in the deafening applause.

With a final, high-energy spin to punctuate her pose, she flexed her core for one last dramatic flex.

Snap.

The sound was sharp enough to cut through the cheers. Before Rumi even had a chance to drop her arms, the strained fabric of the tightly fitted bra gave way entirely, unable to contain the sheer volume of her heavy, natural chest. In a split second, the restrictive top split open, leaving her completely bare to the thousands of stunned convention-goers packed into the auditorium. Her huge breasts bounced freely in the open air, dark nipples hardening instantly under the sudden rush of cool convention air and the sheer shock of the moment.

For a single heartbeat, the roaring crowd went dead silent, every single eye locked onto the unexpected, jaw-dropping reveal.

Instead of freezing, Rumi’s competitive instincts kicked in instantly. A bright, unbothered grin broke across her face as she planted her hands defiantly on her hips, her massive rear swaying slightly as she leaned forward toward the front row without missing a beat.

"Well," Rumi laughed into her headset mic, her husky voice echoing off the rafters with complete, unshakable confidence as she casually crossed her arms over her exposed chest to push her heavy cleavage together just to tease them. "Guess that's what happens when you build for action instead of durability. Hope you all brought your cameras, because the show's not over yet!"