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Burning Desires

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All characters are over the age of 18. Kali and Katsuki Bakugo have been rivals since the very beginning because they’re both just too much alike. Katsuki is explosive and Kali is a raging fire, both spurred by their quirks. All their classmates and friends make weekend plans without them, leaving them alone in the dorm. They both don’t care and desire to go train. But their usual arguing turns into an impromptu spat that leaves them both turned on more than they wanna admit. They get interrupted before anything more can happen but in the showers at their dorm, it picks back up. Kali is a walking wet dream. Her chest and ass are enormous but her waist in slim and her muscle is lean. Her long wild blonde hair and big blue doe eyes make her a perfect combination of innocent allure with the body of a sex goddess. She’s fairly unaware just how attractive she is. Her quirk is fire and healing. Both of them are virgins, having only had oral experiences and masturbation. That’s all about to change when they both submit to one another, trading back control willingly owhich they’ve never done with anyone, ever.

Chapter 2: Chapter 2

The towel lay between them like a fallen flag. The cold air of the hallway was a shock against her skin, raising goosebumps in an instant. Kali didn’t move. She held Bakugo’s crimson gaze, her hand still flat against his chest where she’d shoved him. She could feel the solid wall of muscle beneath his damp shirt, the frantic drum of his heart under her palm. It beat as hard and fast as her own.

His eyes didn’t dart away. They didn’t widen in shock or glee. They stayed locked on hers, a turbulent, unreadable storm. The severity in them was absolute. He wasn’t enjoying this. This wasn’t a victory. It was a disaster they’d both engineered.

“This is a fight we can’t win,” he’d said.

The words echoed in the silent hall. A confession. A surrender. For him, those were the same thing.

Slowly, deliberately, he raised his hands from where they had been braced against the wall. He didn’t touch her. He moved them with a deliberate, almost cautious slowness, palms open, and placed them on her bare shoulders. His fingers were warm, calloused from countless explosions. The heat of them seared into her cool skin.

It wasn’t a pull. It wasn’t a push. It was an anchor.

A shudder ripped through her, violent and involuntary. It wasn’t from the cold.

“Kali.” Her name from his mouth was foreign. He never used it. It was always ‘Kino,’ a surname thrown like a weapon. Now it was just a sound, rough and strained.

She was breathing too fast. The reality of her position—naked in a dorm hallway, her rival’s hands on her skin—crashed down with a nauseating wave. The defiance that had held her upright began to fracture, revealing the raw, trembling shock beneath.

She looked down, breaking the eye contact. The sight of his large, scarred hands against her shoulders, her own pale skin, the stark intimacy of it, was more overwhelming than anything before. This was real. This was happening.

“Look at me.” His command was quiet, but it brooked no argument.

Her eyes snapped back up. The intensity there hadn’t lessened. If anything, it had deepened, focused.

“Pick up the towel,” he said, his voice low and steady. Each word was measured. “Go to your room.”

The instruction was so simple, so mundane, it bypassed her panic. It was a ladder out of the abyss they’d fallen into. Her body obeyed before her mind could rebel. She bent, knees shaky, and grabbed the damp terry cloth. She straightened, clutching it to her chest, a feeble barrier restored.

His hands fell from her shoulders. The loss of their heat was its own shock.

He took a single step back, giving her space. His jaw was clenched so tight a muscle ticked in his cheek. He looked past her, down the empty hall, as if ensuring their privacy was still intact. The act felt protective, and that scared her more than his anger ever had.

“Go,” he repeated, the word gruff.

She went. Her legs carried her down the hall, around the corner, to her door. She fumbled with the keypad, her fingers numb and stupid. The soft beep and click of the lock was the sweetest sound she’d ever heard. She slipped inside, leaned against the closed door, and slid to the floor.

The dark of her room was absolute. She sat there on the cool wood, the towel damp in her lap, and replayed the last sixty seconds on a hellish loop. The feel of his hands. The look in his eyes. Not desire, but a furious, unwilling acknowledgement. Of what?

It is interesting. That’s the problem.

This is a fight we can’t win.

She dragged herself to her feet and mechanically pulled on sleep clothes—an old t-shirt, soft shorts. She climbed into bed but sleep was a distant country. Every time she closed her eyes, she felt the ghost of his grip on her shoulders. It wasn’t a violation. It was a brand.

The next morning dawned with a brutal clarity. The common room kitchen was a minefield of normalcy. Denki was burning toast. Momo was sipping tea, reviewing notes. The sun streamed in, too bright.

Kali moved through it like a ghost, assembling coffee with robotic precision. Her skin felt two sizes too small. Every sound was too loud.

The atmosphere shifted before she saw him. A charge in the air, a drop in the casual chatter. Bakugo entered. He moved with his usual aggressive purpose, a storm cloud in a black tank top and joggers. He didn’t look at her. He went straight to the fridge, pulled out a carton of eggs, and started cracking them into a bowl with sharp, precise movements.

The silence around them grew thick. Denki stopped complaining about the toast. Even Kirishima, who usually bounded over, hesitated by the doorway.

Kali stared into her coffee, feeling the weight of the unspoken event pressing down on the room. It was absurd. Nothing had happened. And everything had happened.

She couldn’t stand it.

Taking her mug, she walked to the sink, which put her directly in his periphery. He was whisking the eggs, his back mostly to her.

“We need to talk.” Her voice was low, but it cut through the kitchen’s quiet.

He didn’t stop whisking. “No, we don’t.”

“Last night—”

“Was a mistake.” He slammed the bowl down on the counter. The ceramic cracked with a sharp sound. A hairline fracture snaked up the side. He stared at it, his shoulders tense. “A series of them. Starting with you being in the wrong damn place.”

“Me? You were the one who—”

He finally turned to look at her. The bags under his eyes were pronounced. He looked like he hadn’t slept either. “I know what I did. I don’t need a recap.” His voice was a controlled burn. “So here’s the new rule: we forget it. We go back to how it was.”

“We can’t.”

“We have to.” He leaned in, his voice dropping so only she could hear. The scent of burnt sugar was faint on him, like a memory. “Or one of us ends up expelled, and it won’t be me. You get that, right? This isn’t a game on the training field. This is real. And it’s fucking messy.”

He was right, and she hated it. The professional consequences were a bucket of ice water. UA’s conduct policies were strict, especially for the Hero Course. Whatever this was, it threatened everything they’d worked for.

“So we just pretend?” she whispered, her throat tight.

“We survive,” he corrected, his eyes hard. “That’s what we’re good at. We fight, we win, we survive. This is no different.”

It was a lie, and they both knew it. This was entirely different. The enemy wasn’t across a battlefield; it was the current humming between them, the memory of skin on skin.

“Fine,” she said, the word tasting like ash. “We survive.”

He gave a single, sharp nod. He picked up the cracked bowl, dumped the eggs into a pan, and turned on the stove. The sizzle was aggressively loud. Conversation over.

Kali took her coffee and left the kitchen. The weight didn’t lift. It just changed shape, settling into a cold, hard knot in her stomach. A ceasefire had been declared, but the war was still raging silently inside her.

The strategy lasted exactly three days.

It was during a mandatory quirk theory seminar, a stuffy lecture hall under the drone of Professor Midnight’s voice. Kali was taking notes, trying to focus on the mechanics of emitter-type limit breaks. Bakugo was two rows ahead and to the left, slouched in his seat, looking out the window.

Someone’s phone buzzed loudly. A guy a few seats down from Bakugo—a second-year from the support course—fumbled to silence it. In doing so, he knocked his textbook off his desk. It skidded across the floor, coming to a stop near Bakugo’s foot.

The guy leaned over, reaching. From Kali’s angle, it was clear his gaze wasn’t on the book. It was on her, a slow, appreciative crawl down her side as she sat bent over her notes. It was a look she’d learned to ignore, a constant, low-grade nuisance. Usually, it just made her roll her eyes.

Bakugo saw it.

He didn’t explode. He didn’t even turn his head fully. He shifted his foot, planted his boot squarely on the textbook, and pinned it to the floor.

The support student froze, his hand outstretched. He looked up at Bakugo’s profile.

Bakugo slowly turned his head. Just enough for the guy to see his eyes. He didn’t speak. He didn’t snarl. He just looked. It was the same flat, terrifyingly intense look he’d given Kali in the hallway—a promise of violence so quiet it was deafening.

The kid paled. He jerked his hand back as if burned, mumbled something, and faced forward, not looking anywhere for the rest of the lecture.

Bakugo casually lifted his foot, kicked the book back toward the kid’s seat, and returned his gaze to the window.

Kali’s pen had stopped moving. Her heart was doing something complicated and painful in her chest. He’d done nothing. And he’d done everything. A territorial, possessive, utterly silent defense. Over a look. It violated their ceasefire in a way that felt more profound than any argument.

After class, she cornered him in the emptying hallway. Students flowed around them like water around a rock.

“What was that?” she hissed.

“What was what?”

“In there. With that guy.”

His expression was all bored irritation. “He was being a creep. I inconvenienced him. Big deal.”

“Since when do you care about creeps?”

“Since it’s a distraction.” He shouldered his bag, not meeting her eyes. “He was staring. You were getting pissed. I could feel your quirk spiking from here. Next, you’d probably set his hair on fire, we’d all get lectured about control, and I’d have to sit through another fucking seminar. I was saving myself the boredom.”

It was a perfectly logical, perfectly Bakugo explanation. And it was complete bullshit.

“You’re a liar,” she said quietly.

That got his attention. His eyes snapped to hers, flashing. “Watch it.”

“You said we forget. You said we go back. That wasn’t going back. That was you… marking territory.”

He stepped closer, his voice dropping to a menacing whisper. “You don’t have a territory. You’re not a thing to be marked. You’re a pain in my ass who can’t mind her own business.”

“Then mind yours!” she shot back, heat rising in her cheeks. “I don’t need your… your fucked-up, silent protection racket! I can handle a guy looking at me.”

“Yeah,” he sneered, his composure finally cracking. “You handle it real well. Just like you handled the hallway. All cool and collected.”

It was a low blow. A direct hit. She flinched.

He saw it, and something like regret flickered behind his anger, gone as quickly as it came. He ran a hand through his spiky hair, frustration evident in every line of his body. “This isn’t working.”

“No shit.”

They stood there, trapped in the flow of passing students, their temporary treaty in ashes at their feet. The problem wasn’t going away. It was growing roots, twisting around every interaction.

“Training gym,” he said abruptly. “Tonight. Ten o’clock. Be there.”

“Why? So you can blow me up and call it therapy?”

“So we can do the only thing we’re both good at,” he said, finally meeting her gaze head-on. The challenge was back, but it was different now. It was an offer. A release valve. “We fight it out. For real. No holding back. Maybe then we can burn this… whatever it is… out of our systems.”

It was the worst idea she’d ever heard. And the only one that made any sense.

“Fine,” she said. “Don’t be late.”

He smirked, a ghost of his old, arrogant self. “You just worry about keeping up.”

He walked away, leaving her in the crowded hall. The knot in her stomach had dissolved, replaced by a sharp, anticipatory buzz. Tonight, they would fight. Not as rivals circling an unspeakable tension, but as conduits for it. They would try to exorcise it through violence, because it was the only language they had left.

She didn’t know if it would work. But as she turned toward her next class, a strange calm settled over her. Finally, there was a path forward. Even if it led straight through fire.

Even if it led straight through fire.

The training gym at night was a cathedral of silence and shadows. The only light came from the emergency strips along the walls, casting everything in a dim, blue-tinged gloom. Kali pushed through the heavy doors at 9:58, her steps echoing on the polished concrete.

He was already there. Bakugo stood in the center of the sparring mat, a dark silhouette rolling his shoulders. He’d changed into a thin black sleeveless shirt and gym shorts. No shoes. “Took you long enough.”

“It’s ten,” she said, dropping her bag by the wall. She wore similar gear, her hair tied back in a severe knot.

“My point.” He cracked his neck. “Rules?”

“No rules,” she said, walking onto the mat. The air between them tightened, thrumming with anticipation. “First one pinned or unconscious yields. Or you know, says ‘uncle.’”

He scoffed. “You’ll be crying it.”

They didn’t bow. They just looked at each other, a meter of empty space charged like a live wire. The memory of his hands on her bare shoulders flashed in her mind, a distracting spark. She shoved it down, letting it fuel the fire in her core instead.

He moved first. A blast from his palm wasn’t a full-powered explosion, but a concussive burst of air and light meant to disorient. She was already pivoting, the heat washing past her cheek. She countered with a whip of her own flame, a searing orange arc that forced him to duck.

Then they were in it.

It was a brutal, beautiful dialogue of force. He was all sharp angles and devastating close-range detonations, each pop stinging the air with the smell of ozone and sweat. She was fluidity and heat, weaving streams of fire to parry, using her smaller size to slip past his guard and land jabbing kicks to his ribs. A grunt escaped him. Good.

“Getting slow,” she taunted, spinning away from a grab.

“Shut up,” he growled, lunging again.

This was their language, perfected over years. But the grammar had changed. Every block felt more intimate, every glancing blow lingered. When she caught his wrist to divert a blast, her thumb pressed against his frantic pulse. He trapped her ankle with his foot, and the pressure made her breath catch. They weren’t just fighting. They were mapping each other.

Whatever they thought the training ground was going to solve they quickly learned they were wrong.

The contest stretched, minute piling on grueling minute. Their breathing grew ragged, sweat painting dark patches on their clothes. The clean, technical spar dissolved into something more primal. He stopped using his quirk to conserve sweat. She let her flames die to embers at her fingertips.

It became a raw, grappling struggle on the sun-warmed mat. She got him in a headlock, her bicep squeezing against his throat. He drove an elbow into her side, breaking her hold with a pained gasp, and rolled on top of her. His weight was immense, pinning her hips. She bucked, trying to throw him off, but he planted a forearm beside her head, caging her in.

Their faces were inches apart. Sweat dripped from his chin onto her collarbone. The heat between them was no longer just from their quirks.

After over an hour of all out war, Kali was ablaze between her legs, angry for it too.

The sensation was a traitor, a wildfire in her veins completely separate from her quirk. It was infuriating. Her body was reacting to the press of him, to the animal struggle, to the sheer overwhelming reality of Katsuki Bakigo reduced to panting, furious physicality above her. She tried to knee him, but he read it, shifting to block her with his thigh. The movement ground him against her.

A sharp, unbidden sound escaped her lips. Not a sound of pain.

His eyes, dark and fierce in the low light, widened a fraction. He felt it too. The electric jolt that had nothing to do with combat. The mask of pure competition shattered, revealing the raw, unfiltered tension beneath. He went utterly still, his entire body rigid with the effort of not moving.

She held her own more than usual and still she somehow felt completely at his mercy.

It was the stillness that did it. The controlled, vibrating pause. She was pinned, yes, but he was frozen, a statue of conflicted want. She could see the battle in his gaze, the war between walking away and giving in. In that hesitation, she felt a power she didn't understand. And a complete, devastating vulnerability.

It was infuriating.

"Get off," she breathed, but it lacked conviction. It was a whisper.

He didn't move. His eyes searched her face, dropping to her mouth, then back up. The air was too thick to breathe.

"Or what?" he murmured, his voice rough from exertion and something else.

She didn't have an answer. Every insult, every challenge, died in her throat. All that was left was the feeling, the unbearable, humming need. Her hands, which had been braced against his chest, unclenched. Her fingers didn't push. They curled slightly into the damp fabric of his shirt.

It was a minute surrender. He caught it.

Both of them feel an intense, overwhelming need for the other.

A low groan rumbled in his chest, a sound of pure defeat. His head dipped, his forehead coming to rest against hers. The contact was shocking in its simplicity. Their ragged breaths mingled.

"This is so fucked," he whispered, the words vibrating into her skin.

"Yeah." It was all she could manage.

His restraint snapped. It wasn't a kiss of passion, but of collision. His mouth found hers with a desperate, grinding pressure. It was all heat and salt and furious, confused want. She met it with equal force, her hands flying up to tangle in the spiky, damp hair at the nape of his neck, pulling him closer, as if she could dissolve the space between them entirely.

The fight was over. A new, more terrifying one had begun.

A new, more terrifying one had begun.

The kiss was nothing like she imagined. There was no softness, no tentative exploration. It was a clash of teeth and shared, labored breath, a direct continuation of their fight through other, more desperate means. His hand fisted in her hair, angling her head to deepen the contact, and a raw, unbidden sound vibrated from her throat into his mouth. Every point of contact burned—his weight on her hips, the scrape of his calloused palm against her scalp, the relentless heat of his mouth.

She clawed at his shoulders, not to push him away, but to pull him closer, to erase any remaining space. The taste of him was salt and something fiercely metallic, like the air after one of his explosions. It was consuming. Logic dissolved. The only facts were the hard mat beneath her back and the harder pressure of him above her.

He broke the kiss with a ragged gasp, his forehead dropping to her shoulder. His entire body shuddered. “Fuck.”

The word was a prayer and a curse. Reality came flooding back in a cold, sickening rush. The gym. The late hour. The absolute insanity of what they were doing. She stared up at the shadowed ceiling, her chest heaving.

“This is a disaster,” she whispered, her voice raw.

“No shit.” He pushed himself up on his arms, looking down at her. His expression was ravaged, conflict tearing through his usual scowl. “We can’t… not here.”

The practical fear cut through the haze. Getting caught here, like this, meant expulsion. It meant the end of everything. The thought was a bucket of ice water.

He rolled off her and stood up in one jerky movement, turning his back. He ran both hands through his hair, his shoulders tight with tension. “We need to…”

“We need to stop,” she finished, sitting up. Her body felt alien, humming with unmet need. Saying the words felt like a lie.

“Yeah.” He didn’t turn around. “We do. But we won’t.”

The stark honesty of it hung between them. He was right. The ceasefire was ash. The fight had failed. This new thing was a wildfire, and they were standing in the center of it with no will to run.

“So what?” Her voice was small in the vast, dark gym. “We just… explode?”

He finally turned. His eyes gleamed in the low light, decisive. “We contain it.”

“How?”

“We control where. And when.” He spoke quickly, the plan forming in real-time. “No one can know. Not a whisper. Not until we’re out of here. Until we have our licenses.”

It was the most rational thing he’d ever said to her. It was also a confession that this wasn’t a one-time mistake. This was a negotiation for an ongoing, clandestine war.

“It’ll affect our training,” she argued, but the protest was weak. She was already calculating, already agreeing.

“It won’t.” He took a step toward her, his gaze intense. “It’ll make it better. We work better pissed off. We work better with… this. We channel it. Use it.”

He was talking about using the tension, the raw energy, as fuel. Treating it like another aspect of their quirks to be mastered. It was a dangerously Bakugo solution.

“You think we can do that?” She stood, facing him, her legs unsteady.

“I don’t think. I know.” He closed the distance, his voice dropping to a low, urgent rasp. His hand came up, but he didn’t touch her. He just hovered it near her jaw. “We keep it secret. We keep it separate. And we use it to get better. To beat everyone else.”

It was a pact. A twisted, impossible pact built on rivalry and secrecy and this terrifying new magnetism. She searched his face, looking for the lie, the trap. She saw only a frantic, determined honesty that mirrored the chaos in her own chest.

“Okay,” she breathed.

The word was a release. His hovering hand finally made contact, his thumb brushing roughly over her kiss-swollen bottom lip. The touch was electric.

“Okay,” he echoed.

Then his hand slid down to grip hers. His grasp was firm, almost painful. “Not here. Come on.”

He didn’t ask. He led, pulling her off the training mat toward the service door at the back of the gym. It led into the school’s underbelly—a maze of maintenance corridors and storage spaces rarely patrolled after hours. His movements were sure, decisive. He knew where he was going.

They moved in silence, their footsteps echoing off concrete walls lined with pipes. The air was cooler here, smelling of dust and old machinery. He turned a corner, shouldered open an unmarked door, and pulled her inside.

It was a storage room for broken training drones and old mats, cramped and shadowy. A single, bare bulb hung from a wire, casting a dim yellow pool of light. He kicked the door shut behind them, and the world shrank to this tiny, secret space.

The second the latch clicked, the careful composure shattered. He pushed her back against the door, his body slamming into hers, and his mouth found hers again. This kiss was different. No longer a collision of confusion, but a focused, hungry claiming. There were no more excuses to murmur. The agreement was sealed.

What poured out between frantic breaths were not sweet nothings, but a jagged, urgent treaty.

“Until graduation,” he growled against her mouth, his hands sliding under the edge of her shirt, scorching her skin.

“Not a word,” she gasped, arching into him, her fingers scrambling for the waistband of his shorts. “To anyone.”

“It makes us better.” He said it like a vow, biting at her lower lip. “We’ll work harder. Train harder.”

“We’ll be better,” she agreed, the words swallowed by his kiss. It was a mantra, a justification, chanted into the dark as their hands grew more desperate, pulling at fabric, seeking skin.

The promises were a thin shield against the reality of what they were doing. They meant them, in that moment. They believed this secret could be boxed up and used as a tool. That they could touch like this in the dark and then face each other in the daylight as unchanged rivals.

He yanked her shirt over her head. The cool air hit her skin, followed immediately by the heat of his palms. His touch was not gentle. It was mapping, possessive, as if memorizing the terrain of her ribs, the curve of her waist he’d only seen before in a fleeting, shocking moment in a hallway. She reciprocated with equal ferocity, pushing his shirt up, her nails scraping over the defined planes of his stomach, feeling the powerful flinch of his muscles.

There were no more words. The chaotic, whispered pact was the last stand of their rationality. It was swept away by a current far more primitive. In the dusty, isolated dark, they gave in. They made no move to stop. They pushed on, a tangled, sweating, breathless mess of limbs and muffled sounds, chasing the feeling that had terrified them for weeks, using each other to burn it out even as they knew, in some deep, ignored part of their minds, that they were only feeding the fire.

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