My Harem System In My Hero Academia

After a short ride where Yami spent most of the time curled up in "burrito mode", the bus finally arrived at the massive USJ dome. 

The class stared up at the structure, their jaws practically hitting the floor.

"WHOAAAA!!" Kaminari yelled, his voice echoing in the massive dome, it was roughly the size of a small town.

"IS THIS UNIVERSAL STUDIOS JAPAN?!" Mina chimed in, her excitement matching his.

As the students poured out of the bus, a short, chubby figure appeared seemingly out of nowhere, wearing what looked like a marshmallow costume. The figure raised a hand dramatically.

"I built this facility myself," the figure announced proudly. "I call it… The Unforeseen Simulation Joint!"

Some of the students exchanged glances.

"Look! It's the space hero, Thirteen!" Kirishima said, "Ooh, I love Thirteen!" Mina added, practically bouncing on her heels.

From the back, Mineta muttered, "I like them under thirteen…" Thankfully, no one seemed to hear his disgusting remark.

Momo, always composed, stepped forward and explained for anyone unaware. "Thirteen is a gentleman hero who specializes in rescue work. His abilities make him ideal for situations like this."

Aizawa walked up to thirteen and whispered low so the students couldn't hear, "Thirteen, where's All Might? I thought he was supposed to meet us here."

Thirteen turned to him and offered a polite bow. "About that, Sensei… it seems he used up all his time for the morning. He's resting in the break room right now."

Aizawa sighed, rubbing his temples. "The height of irrationality," he muttered. Then, glancing at the students, he added, "Stay on guard anyway. Just in case."

Yami's golden eyes scanned the massive dome, his thoughts elsewhere.

'I could warn them,' Yami thought, keeping his expression blank. 'But then I'd have Nezu and All for One breathing down my neck and crawling up my ass, trying to figure out how I know all this. Nope. Not worth it. I'll just keep things from getting too messy when the time comes.'

While Yami planned his approach, Thirteen addressed the class, giving her usual inspirational speech about the importance of using their Quirks responsibly. 

Momo stood beside Yami, her posture as straight as ever, her eyes sharp as she focused on Thirteen's words. Yami, however, barely listened, his attention snapping to the fountain in the middle of the dome.

A droplet of darkness appeared in midair, growing larger by the second. Its unnatural shape rippled, twisting and distorting as if it were alive.

Yami narrowed his eyes, his muscles tensing. 'There he is'

Momo noticed the shift in Yami's face and followed his gaze. Her expression turned serious as she grabbed his arm. "Is that…?"

"Yeah," Yami said, his voice calm but firm. "Villains."

The system popped up with a sudden alert, filling Yami's vision.

====

[New Mission: Break the Unbreakable!]

Objective: Defeat the USJ Nomu.

Reward: Quirk Technique - Space Ripper Stingy Eyes.

Failure: Death, Just kiddin', I'll make Angela never lactate again.

====

'Of course,' Yami thought, his golden eyes narrowing as he began thinking of how to deal with the Nomu.

Aizawa stepped forward, his scarf already moving as if it had a mind of its own. "Huddle up and don't move," he ordered everyone.

"Huh?" Iida questioned, clearly confused.

"Aizawa-sensei, what's going on?" Kaminari asked nervously. "More robots like during the entrance exam?"

"What the heck is that?!" Mineta shrieked, trying to cling to Momo's legs.

Momo, unfazed, kicked him hard in the balls, sending him crumpling to the ground. "Don't touch me rat," she said coldly.

In the center of the dome, a dark mist swirled and grew larger, forming a portal. 

Villains poured out—a terrifying group with all kinds of dangerous quirks. Among them was a woman with snakes for hair, a man in a gas mask gripping a machete, and a muscular woman with huge, orange arms made of hair.

Aizawa turned to Thirteen. "Protect the students!"

Before anyone could react further, the black mist expanded, swallowing everyone in an instant.

Yami quickly grabbed Momo by the waist as the world shifted around them. In a blink, Yami and Momo landed hard in the middle of the fire zone, the heat from the flames making the air feel heavy. 

Around them, buildings were crumbling, and the ground was littered with villains, all mutation-types with freaky features like claws, fangs, and glowing eyes.

Momo immediately got to work, her breasts glowing as she made two gas masks and handed one to Yami. "Here," she said, her voice sharp but calm. "You better not get on the way."

Yami took it, slipping it on with a smirk. "Excuse you? Relax, Cow. I'm the one carrying your ass anyway."

Momo scoffed, ignoring him as she created two weapons—a thin rapier for herself and a saber for Yami. 

She spun the rapier gracefully, testing its weight. "Try not to get yourself hurt," she said, glancing at him. "I don't feel like dragging your unconscious body out of here again."

Yami laughed, gripping the saber. "That's rich coming from someone who can't keep up."

Before Momo could snap back, a group of villains charged at them. Yami didn't wait—he lunged forward, his blade flashing as he hit the first guy in the stomach with the hilt of the sword. 

He pulled his punches, but the hit was enough to send the guy flying into a wall, groaning.

"Still got it," Yami muttered, dodging another clawed attack.

Momo, meanwhile, moved like she was in a fencing match. Her rapier darted in quick, precise jabs, targeting weak points without hesitation. 

One villain tried to rush her from behind, but Yami slammed the hilt of his saber into the guy's jaw, dropping him.

"Nice save," Momo said, smirking.

"See? Told you I'm carrying this team," Yami shot back, back kicking another villain in the chest.

They fought side by side, taking down villain after villain. Yami couldn't help himself, though. As Momo leaned forward to dodge an attack, he reached out and gave her ass a squeeze. 

Momo stiffened, her face heating up as she glared at him. "Yami! Focus!"

"What?" he said innocently, shrugging. "Thought it was a motivational pat."

Momo shook her head, muttering, "You could've at least been rougher." as she made a flashbang grenade, throwing it into a group of villains.

After taking down nearly sixty villains, they paused to catch their breath.

In the distance, Ojiro was surrounded by a massive group of villains, his tail whipping around as he fought them off. 

He shouted something about a Water Stream Rock Smashing Fist, his voice echoing over the roar of the fire.

Yami leaned on his saber, watching the scene. "Think we should leave him to it?"

Momo glanced at Ojiro, then back at Yami. "He looks fine. Let's move before you decide to squeeze someone else's ass."

Just then, Yami accidentally grabbed the chest of a female villain he'd just knocked out. 

He froze, looking at Momo with a sheepish grin. "Oops. Thought it was you, Cow."

Momo rolled her eyes, kicking him lightly. "You're disgusting. Let's go find the others before you embarrass yourself more." she said. 

Still, internally she thought, 'How could Yami mistake my beautiful fat tits for that lowlife's?'

"Yeah, yeah," Yami said, standing up and following her. "I'm still the MVP of this fight, though."

Momo didn't bother replying, but she couldn't hide the small smile tugging at her lips as they ran toward the mountain zone, leaving the scattered villains behind.

Meanwhile, Uraraka, Kaminari, and Jiro were in a hopeless fight against a pack of villains in the mountain zone. 

Jiro's headphone jacks blasted a desperate sonic boom, scattering their attackers for a second, but the effort left her bleeding from her ears, barely able to stand. 

She winced in pain, clutching at her jacks as the villains regrouped; Ochako and Kaminari weren't doing much better. 

Kaminari, had fried his own brain using his Quirk's ultimate move to save Jiro, sat slumped against a boulder, his blank stare proving he was useless now. 

Ochako panted, sweat dripping from her flushed face, her body shaking as she raised trembling fists in defiance. She was exhausted, and it showed.

It didn't take long for the villains to overpower them. Kaminari took a savage kick to the head, crumpling to the ground, unconscious. Ochako and Jiro were forced onto their backs, their limbs pinned by rough hands.

The villains grabbed them both, forcing them onto their backs. One villain tore Ochako's hero suit apart, exposing her cheap white bra that barely contained her large, soft tits. 

Her thick thighs pressed together as she struggled, her wide hips and plump ass drawing lecherous stares.

Jiro wasn't spared. Another man yanked open her jacket, revealing a simple black sports bra that hugged her small, perky chest. 

Her slim, petite frame trembled under their hands as she tried to fight back, tears streaming down her pale face.

"Look at this fat-ass bitch," one of the villains sneered, slapping Ochako's round, jiggling butt. "Bet she just waddles around hoping to look heroic."

"And this one," another laughed, roughly grabbing Jiro's face. "No tits, no ass—nothing worth even touching. She's a joke."

Jiro whimpered, her voice cracking as she begged, "Please… stop… don't…"

Ochako choked out a sob, her teary eyes filled with terror. "Just let us go… please…"

One of the men, a burly asshole with a jagged scar on his cheek, leaned in close. "While the boss does his thing, we'll make sure you two know your place."

Before he could reach out, a sharp black spike shot through the air, slamming into his skull with a sickening crack. 

He dropped like a sack of garbage, blood pooling beneath him. The other villains froze, their sneers turning to wide-eyed panic.

Yami stepped into view, his golden eyes glowing with rage. Momo followed, her rapier gleaming in the sunlight.

"No man should ever treat a woman like that," Yami stated, "And I see no men here."

With a grotesque snap, his ribs burst from his chest like jagged spears, glinting with sharp edges. 

They shot forward brutally, impaling the closest villains through their crotches. Blood sprayed as the men screamed, clutching their shattered groins as they collapsed.

"Hurts, doesn't it?" Yami sneered, stepping over their writhing bodies. "Not so funny now, is it?"

Momo darted forward, her movements now robotic. She drove her rapier into the crotch of a villain about to lunge at Yami, his body crumpling before he even hit the ground. 

Her sharp eyes scanned the area, spotting another group rushing toward them.

"Yami, focus!" she called out, throwing him a glance.

"I'm on it, Cow," he shot back, a dark grin spreading across his face. His ribs extended further, slicing through the air as he tore into the remaining villains. .

Within moments, the attackers were either unconscious, bleeding, or too scared to move. Yami turned back to the girls, who lay trembling on the ground.

"Scatter before the last man standing is me." Yami said as the men ran away.

Ochako's tits spilt slightly out of her torn bra as she hugged her arms across her chest, her face red with embarrassment. 

Jiro clutched the remains of her jacket, trying to cover her small, exposed body. Both of them stared up at Yami with wide, tear-filled eyes.

"You're safe now," Yami said, crouching down to look them in the eye. His voice was softer now, comforting even.

Ochako hiccuped through her sobs, her thick thighs pressing together as she nodded. "T-Thank you…"

Jiro's lips quivered as she whispered, "Thank you… thank you so much."

Momo stepped in, handing the girls makeshift cloaks she'd quickly created. "Here," she said firmly, her voice calm but sharp. "Cover yourselves."

As they pulled the cloaks around their torn clothing, Yami straightened, turning his sharp gaze toward the center of the USJ dome.

Yami crouched in front of Uraraka, his sharp golden eyes locking onto hers. 

He could see the fear in her trembling body, the tears streaming down her flushed cheeks. 

The remains of her tattered costume clung to her, and her breaths came in shaky gasps.

"Uraraka," Yami began. "What you've been through… I can't even pretend to understand how it feels. But listen to me." He placed a hand over his chest, where his ribs had torn through earlier, the cracks already starting to heal as his petrified skin worked its magic.

"We're heroes," he said. "It's not about being perfect or never being scared. It's about standing up, no matter how much it hurts, and doing what's right.

"Right now, Aizawa-sensei is out there, fighting against a swarm of villains to keep us safe. He's counting on us, and I'm counting on you."

Uraraka's teary eyes met his, wide and unsure. She opened her mouth to speak, but no words came out.

Yami extended his hand to her, his gaze unwavering. "You're stronger than you think, Uraraka. We've got a fire in you that no villain can snuff out. Take my hand, and let's face this evil head-on—together."

For a moment, the world seemed to pause. Uraraka stared at Yami's outstretched hand, her mind replaying the villains' taunts, her helplessness, and the terror she'd felt moments ago. 

But then, like a spark catching flame, something shifted inside her.

She straightened her back, her trembling slowing as her breathing steadied. The fear was still there, but it no longer controlled her. 

Wiping her tears away with the back of her hand, Uraraka reached out and grabbed Yami's hand firmly.

"You're right," she said, her voice soft but growing stronger with every word. "I can't let fear win. I won't let them win."

A small, proud smile tugged at Yami's lips as he helped her to her feet. 

Yami let go of her hand, watching as she squared her shoulders and adjusted the makeshift cloak Momo had given her. 

"Stay close to me," Yami said, turning toward the direction of Aizawa's fight. "Momo, shockwave."

"On it," Momo said as she helped Jiro stand up. Yami wrapped his arms tightly around the girls' bodies and petrified his legs as Momo threw multiple grenades into the ground, launching Yami in Aizawa's direction.