My Harem System In My Hero Academia

My name's Jiro Kyoka, and I'm the vice president of Class 1-A. Our class president is Yaoyorozu Momo. 

She's basically the queen of the class—brilliant, beautiful, and, let's face it, built like a supermodel. 

She's everything I'm not. Where I'm short and flat, Yaoyorozu is tall, curvy, confident, and practically perfect.

She's also a pervert.

The first time I realized it was during our quirk aptitude test. I was fiddling with my Earphone Jacks when I overheard Iwatani Yami, the weirdly tall and muscular student, lean over to Yaoyorozu and smirk. "Thanks, cow," he said under his breath.

I froze. 'Did I just hear that right?'

My quirk lets me pick up even the slightest sounds—heartbeats, whispers, tiny vibrations in the air. 

It's great for hero work, but it's also a curse. I hear everything. And for some reason, that includes things I don't want to hear, like Yami calling Yaoyorozu a cow and her not reacting like a normal person would. Instead, she just smiled like she liked it.

That was the moment I started suspecting those two were… weird.

I've always had bad luck with anything sexual. Ever since I was a kid, I've had to put up with people making comments about my mom being a "thick MILF," which is gross. 

And when I hit puberty, I didn't get the kind of curves my mom had. Nope. No tits, no ass—just flat as a board. So hearing stuff like that about my mom? Yeah, it's been a lifelong curse.

Anyway, after class that day, I went to a bathroom far from our classroom. 

I just wanted some peace and quiet to play with my Earphone Jacks and listen to some music. You'd think an empty bathroom would be safe, right? Wrong.

I was in the middle of zoning out when I heard footsteps. Two people walked in, whispering. I froze. It was them—Yaoyorozu and Iwatani. Of all the bathrooms they could've picked, they chose this one.

I held my breath and lifted my feet off the ground, praying they wouldn't notice me. My heart pounded as I listened to their conversation.

"Feels better, doesn't it?" Iwatani said, his voice low and teasing.

"I… I couldn't hold it anymore," she admitted, her voice barely above a whisper. 

My stomach dropped. What the hell were they talking about?

Then I heard it—a soft pop, followed by the unmistakable sound of liquid splattering into the toilet. My cheeks burned as I realized. 'Oh my god.'

"You've been walking around with all that inside you all day, huh? You're something else, Momo."

"It's not my fault," she whispered, almost defensively. "You're the one who filled me up so much."

I wanted to die. Right there in that stall, I wanted the earth to swallow me whole. I squeezed my eyes shut, hoping they'd leave soon, but they didn't.

"And you're the one who begged for it," he said, teasing her, "You begged for each load, didn't you?"

There was a long pause. I imagined Yaoyorozu blushing, her perfect composure cracking.

"We… we shouldn't," she stammered. "We shouldn't be doing this here."

"Relax," Yami replied. "Not like anyone's here."

I bit my lip so hard I thought I'd draw blood. 'I'm here, you idiots!'

Finally, after what felt like an eternity, Yaoyorozu flushed the toilet and adjusted her uniform. "Let's go," she said, her voice quieter now.

When I was sure they were gone, I let out a shaky breath and climbed down from the toilet. My legs felt like jelly as I tried to process what I'd heard.

I swore to stay as far away from those two that day as possible. They were clearly insane—or, at the very least, way too comfortable doing weird shit in public.

But life had other plans. A week later, we had our class elections. Guess who got stuck working together as vice president and president? Yep. Me and Yaoyorozu.

As if that wasn't bad enough, not long after, Iwatani saved my life at the USJ. I don't even want to think about what would've happened if he hadn't been there, but now I feel like I owe him.

So here I am, trapped between a "cow" and her "owner"—two perverts who somehow keep making me feel like I'm the weird one. 

'I don't know how much more of this I can take.'

"Jiro, are you okay? Did you finish the paperwork Aizawa-sensei left for us before he went to the hospital?" Yaoyorozu's voice broke through Jiro's scattered thoughts.

Jiro blinked, snapping back to reality. "Oh, yeah. Almost done," she replied quickly, pushing aside her unease. 

The two of them went back to discussing the logistics of the upcoming U.A. Sports Festival. Jiro kept sneaking glances at Yaoyorozu, trying not to think too hard about the other things she knew about her.

As they talked, Jiro's gaze shifted toward Uraraka and Yami, sitting a little too close. 

Jiro's brow furrowed as she watched Uraraka blush at something Yami whispered, her hands fidgeting nervously. Jiro rolled her eyes. 'Seriously? Another one? In the classroom?'

Before Jiro could say anything, Iida's booming voice shattered the low hum of chatter in the room. "Everyone!! Morning homeroom is about to begin! To your seats, please!"

"Dude, we're already sitting. You're the only one standing," Kaminari muttered, lazily leaning back in his chair.

Just then, the classroom door creaked open, and everyone turned to see a mummy step inside.

"Morning," the mummy-like figure said, raising a hand encased in a cast. His monotone voice was unmistakable.

"Aizawa-sensei?!" Uraraka gasped. "You're back already?! What an undeniable pro!"

Expressions of concern were heard throughout the classroom as the students processed the sight of their severely injured teacher. 

But, as always, Aizawa cut straight to the point. "My welfare isn't important," he said gruffly. "Because your fight is far from over."

In the back corner of the room, a dark aura seemed to form around a grape tree, who was trembling in his seat.

"U.A.'s Sports Festival is fast approaching!" Aizawa announced, his voice steady despite the pain he had to be in.

Mineta's ominous aura dissipated instantly, replaced by a spark of excitement. "That's so totally ordinary!" he exclaimed, his earlier gloom forgotten.

"Come on! We just had a villain attack," Kaminari pointed out, slumping in his seat. "Are you sure about this?"

"It's necessary," Aizawa replied, his tone brooking no argument. "To demonstrate that U.A.'s crisis management protocols are sound... That's the thinking, apparently. Compared to past years, there'll be five times the police presence."

The class exchanged glances, murmuring among themselves. Aizawa's next words silenced them.

"Anyhow, our Sports Festival is the greatest opportunity you'll get. It's not an event that can be cancelled over a few villains."

"A few villains?!" Mineta exclaimed, horrified. "Are you serious?!"

"Mineta," Yaoyorozu said, standing up from her seat, calm and composed, "are you telling me you've never seen U.A.'s Sports Festival?"

"Of course I have!" Mineta shot back. "That's not what I mean..."

The conversation dissolved into mindless chatter, but before the noise could escalate, Yaoyorozu stepped forward, raising a hand to address the class. 

"Allow me to make a brief presentation," she said. "Aizawa-sensei, you may take a nap."

Yaoyorozu raised her hand and activated her Quirk without missing a beat, materializing a perfectly compact sleeping bag in her palm. She handed it to Aizawa with a polite smile.

"Thank you," Aizawa muttered, crawling into the sleeping bag. Out cold within seconds.

"The U.A. Sports Festival is one of the biggest events in Japan," she began.

"This event is a huge chance for all students at U.A. High. For the Hero Department, it's an opportunity to show their skills in front of Pro Heroes. These Pros might want to hire them after graduation if they like what they see."

"For students in the General Department, the festival is their shot to prove they're good enough to move into the Hero Department. But the opposite can happen too—Hero students who don't perform well could be transferred out."

She paused for a moment, glancing around to ensure everyone was paying attention.

"Support Department students use the festival differently. They show off their inventions to executives from support companies. It's like a live demo for future work opportunities." 

"As for the Business Department, they don't focus on competing. Instead, they run business simulations, like selling snacks or souvenirs to the crowd and calculating how the other students might perform."

Yaoyorozu clasped her hands in front of her. "When the event ends, Pro Heroes can nominate students they're interested in. These nominations show that the Pros see potential in a student." 

"The Sports Festival will be held in two weeks. Do you have any questions?"

As Momo asked the final question, the lunch bell rang, and the classroom erupted into noise. 

Yami stood up, walked behind everyone else, stretched, and then glanced at Momo, who was still before the whiteboard. "Come on, Cow, let's eat. You need to refill after all that mooing," he said to her ear with a smirk.

Momo sighed but didn't bother snapping back. Without a word, she packed her things and followed him out of the room. 

Uraraka trailed behind them like a lost puppy, clutching her bento bag nervously.

Momo noticed how Uraraka's eyes lit up when she looked at Yami. The girl was practically drooling, her cheeks red and her lips twitching like she wanted to say something but didn't have the guts. 

Momo's sharp gaze swept over her. The "cow" part of her, as Yami liked to call it, saw Uraraka as a piece of prime meat. 

Her fat ass bounced with every step, those thick thighs rubbing together in a way that practically begged for attention. She was soft in all the right places, with curves that screamed "breedable."

But the "Yaoyorozu" side of her, the logical and composed one, couldn't ignore the pang of pity she felt. Uraraka didn't know what kind of man Yami really was. She didn't know he wasn't the type to settle for one girl—he collected women like trophies. 

Momo knew that when Uraraka found out, it'd break her for better or worse.

The three of them reached the cafeteria, Momo and Yami grabbing food trays before settling at a table near the windows. 

Yami sat down like he owned the place, slouching in his chair and spreading his legs wide. 

Momo sat beside him, her usual straight posture making her look like the prim and proper girl everyone expected her to be. Across from them, Uraraka fidgeted nervously, glancing at Yami every few seconds.

Yami reached over and snatched a fry off Momo's tray, popping it into his mouth. "Thanks, Cow," he said with a grin.

Momo didn't even flinch. "You could at least ask," she replied coolly, sipping her tea.

"Where's the fun in that?" Yami shot back, leaning closer to her. He noticed Uraraka watching them, her big brown eyes wide with curiosity. "What's with you, Uraraka? You gonna stare all day, or are you gonna eat?"

Uraraka's face turned bright red. "I—I wasn't staring!" she stammered, grabbing her spoon and shovelling soup into her mouth. Her nervous movements only made her tits jiggle slightly under her blouse, and Yami didn't miss it.

Momo noticed too. She sighed inwardly, shaking her head. Uraraka was so obviously into him it was almost pathetic. The poor girl had no idea what she was getting herself into.

The rest of lunch passed without much incident. However, Momo couldn't help but notice how Uraraka kept sneaking glances at Yami. It was like watching a lamb stumble toward a wolf.

When they returned to their homeroom, they were greeted by chaos. Bakugo stood in the middle of the room, shouting at a group of General Department students. 

His sharp, angry voice cut through the air like a knife. Among the crowd was a student from Class 1-B, grinning smugly as they argued back.

"Shut the fuck up before I blow your goddamn heads off!" Bakugo snarled, stepping closer to one of the General Department kids. 

His hands sparked with small explosions; Momo pinched the bridge of her nose, already feeling a headache coming on. "This is ridiculous," she muttered, stepping forward.

Before she could speak, Yami walked past her. His tall body immediately drew attention.

"What's going on here?" Yami asked, his tone calm but carrying an edge that made everyone shut up.

Bakugo glared at him. "None of your fucking business, Iwatani."

"Wrong," Yami replied smoothly. "You're making it everyone's business by screaming like a toddler throwing a tantrum."

The General Department kids started muttering among themselves, but Yami's sharp gaze shut them up. 

Momo stepped in, her voice firm. "This isn't the place for this kind of behaviour. If you have issues, take them outside."

Bakugo scowled but backed off, muttering curses under his breath. The other students quickly dispersed, not wanting to stick around and risk Yami or Momo's anger.

As the room settled, Momo turned to Yami. "Thanks," she said quietly.

Yami smirked, his golden eyes glinting. "No problem, Cow. Someone's gotta keep these idiots in line."

Momo rolled her eyes, but a small smile tugged at her lips. She couldn't deny that Yami had a way of handling things. Whether it was with his words or his fists, he always got results.

After classes, Uraraka returned to her small apartment. It wasn't much, but it was what her parents could afford. 

She threw her bag on the floor and flopped onto her bed, staring at the ceiling. 

Her mind kept drifting back to Yami—his smirk, the way he talked to her, and how he always seemed so confident. It made her heart race just thinking about him.

As the night wore on, she couldn't shake the feeling. She kicked off her shoes, stripped down to nothing, and climbed under her covers. 

Her body felt warm, and her thoughts kept circling back to Yami. She had never done anything like this before. 

In her seventeen years, she'd never even thought about touching herself. There had never been time between studying, training, and working part-time to support her parents. 

But tonight was different. Tonight, her body craved something she didn't fully understand.

Her fingers trailed down her stomach hesitantly. She imagined Yami's intense eyes on her, the way his gaze made her feel seen and wanted. 

Her breathing quickened as she slid her hand lower. 

Every thought of him, every smile, every word he'd spoken to her flashed through her mind.

Her body started trembling as her fingers worked faster, and her heart pounded in her chest. 

Just as she felt herself about to reach her peak, her phone buzzed loudly on the nightstand. She froze, yanked her hand away, and grabbed her phone with shaking fingers.

It was Yami.

Her cheeks burned bright red as she hesitated for a second before answering. "H-Hello?" she said, her voice shaky.

"Hey, Ochaco," Yami said smoothly on the other end. His voice sent a shiver down her spine. "Oh, can I call you Ochaco? Actually, I'm just gonna call you Ochaco."

She laughed nervously. "Y-Yeah, that's fine."

"Cool," he said. "Listen, Momo and I are planning to train at the beach this weekend. Thought I'd see if you wanted to come with us."

Her heart practically skipped a beat. "Yes! I'd love to!" she blurted out, maybe a little too eagerly.

"Great," Yami said. "Don't worry about clothes or anything. On Friday, we're going shopping with Momo to pick up what we need. I'll send you the details later."

"Okay," she said softly, biting her lip to keep herself from squealing.

After they hung up, she stared at her phone, her chest rising and falling as she tried to calm herself. 

She couldn't believe it. Yami had personally invited her. And the way he said her name… she couldn't wait for the weekend, and she couldn't wait to see him tomorrow.