My Harem System In My Hero Academia

Momo dragged Yami's unconscious, fully petrified body—wrapped up like a burrito—into the CCTV basement, where the class and All Might were eagerly watching the ongoing matches. 

Sato followed close behind, casually carrying Mineta like a sack of potatoes over his shoulder.

Momo looked noticeably thicker than at the end of the fight as she walked in. 

Most of the grenades, wires, and other tools she'd created during the match had been reabsorbed into her body. 

Her thick curves were only half as big as usual, leaving her looking leaner but still undeniably gorgeous. 

As soon as she got Yami into a corner, she reached into her shrinking cleavage, pulling out a small UV lamp she'd made from the fat she reclaimed.

Placing the UV lamp next to Yami, Momo stood tall and brushed sweat from her forehead. 

"He's fine," she said firmly, waving off the mini-transport bots that tried to approach. "He'll wake up soon. I only gave him enough gas to put an elephant to sleep—nothing serious."

The class stared, unsure whether she was joking or not.

A few minutes passed before the crowd's attention shifted back to Yami. Suddenly, a white-gloved hand punched through the stone cocoon as he began depetrifying. 

The rest of his body followed, the cracks in his petrified skin fading to reveal his real body. 

His shredded uniform did little to hide his muscular body. His abs, pecs, and biceps gleamed under the lights, making a few of the girls blush.

Even Uraraka glanced up at him from the screen showing Ashido's match, her face red as she stammered something to herself.

[Sleepy head~ Uraraka was really pumped up watching you fight. Maybe she wants you to pump her up next~,] the system chimed in.

Yami groaned, rubbing his temples. 'Shut up'.

[Oh, and by the way, THE MISSION. Get to it. Byeee~!]

Yami shook his head and looked at Momo, standing nearby with a slight pout. "How long was I out?" he asked.

Momo casually slid the UV lamp back into her breasts, her chest visibly swelling a little as she absorbed it. 

Her body started to thicken up again, her tits becoming fuller, her waist narrowing and her hips flaring out to their natural, impossibly wide shape. 

Her thick thighs and round ass returned, filling out her costume in all the right places.

"You've been out for 15 minutes," she said. "Todoroki's match has already finished, and we're watching Ashido's now."

Yami nodded and rubbed his arm where his skin had started burning. "Thanks for the save. So… who was the MVP?" he asked, smirking.

Momo's pout deepened. "The MVP? Obviously, it was me. Who else managed to put you to sleep like that?"

Yami chuckled, stretching his arms. "Yeah, yeah. You did good, cow."

Momo's face turned crimson, but she didn't argue. Instead, she crossed her arms, which only made her massive tits press together in her tight costume.

"Could've gassed the whole building...," she said.

Yami grinned. "But you didn't, cow~."

Ashido's match was wrapping up, but Yami couldn't stop glancing at Uraraka, who was now stealing quick, flustered looks his way. At the same time, Momo was thinking about how to improve her shockwave grenades...

After all the matches were done, the day went back to normal. The class had to sit through boring lessons, ending with Integral Calculus. 

It was too hard for most of the class, but for Yami, Momo, and even Mineta, it felt like baby math.

When the bell rang, the students rushed out, and everyone was ready to head home. 

Yami and Momo stayed behind, though. She sat at her desk, chewing on a carb bar to get her strength back from the fight.

Yami walked over, swinging his bag onto his shoulder. He waved at Sato as he left. "He's actually a cool dude," Yami said, plopping himself onto Momo's desk, making her jump slightly.

Momo blinked up at him, caught off guard. "You scared me."

Yami smirked. He leaned in close, his warm breath brushing against her ear. "So~ Angela's busy tonight, which means we've got the house all to ourselves. I've been thinking… I've never face-fucked anyone while eating dinner. Sounds like fun, huh?"

Momo nearly choked on her carb bar, her face burning red. "Y-Yami!" she scolded him, glancing around as if someone might hear.

"What?" Yami said, standing up from her desk like he didn't just say something so freaky." Come on. Let's head out."

Momo finished her bar and grabbed her bag, still red-faced as they walked out of the classroom.

As they left, Yami spotted Midoriya in the distance. He was running after Bakugo, shouting something they couldn't hear. 

Yami tilted his head, watching the scene like it was some kind of cheap soap opera.

"Hey, Momo," Yami said. "What do you think of broccoli boy?"

Momo followed his gaze, watching Midoriya trip over himself as he tried to catch up with Bakugo. "He's… determined," she said, choosing her words carefully. "Awkward, sure, but he's a good guy."

Yami snorted. "Determined to get stomped, you mean. He got no pride. He's like one of those little dogs that won't stop wiggling their tail, even when the big dog bites them."

"Yami!" Momo said, glaring at him, though she couldn't fully hide the smile creeping onto her face. "You're so mean."

"Mean? Nah, just honest," Yami said with a shrug. "Look at him. If Bakugo told him to jump into a volcano, he'd probably ask if it's hot enough."

Momo shook her head. "You could try being nice for once."

Yami smirked, leaning down closer to her. "I am nice. I let you off easy earlier, didn't I?"

Momo's cheeks turned bright red, and she picked up her pace, walking ahead of him. Yami chuckled to himself, catching up with her in a few steps.

By the time they got to the limo parked at the gate, Momo had finally calmed down a bit. 

She climbed in, and Yami stretched out lazily beside her. The engine hummed as the car pulled away from U.A.

Yami leaned back, throwing an arm around Momo's shoulders. "Tonight's gonna be fun," he said, grinning. "You'll see."

Momo didn't answer, but her legs pressed together, and she stared out the window, her mind spinning with everything he'd said, she really wanted that cock inside her, in any hole he wanted.

After stepping out of the limo, Momo told the driver she'd be staying at Yami's place for the night. 

She handed over a fat stack of 100,000 yen like pocket change before heading inside with him. 

The driver looked at Momo and Yami, holding hands as they walked in, and sighed before driving off.

Once they got through the door, Momo's eyes lit up. "Alright, you gotta see this," she said, practically vibrating with excitement.

Before Yami could ask what the hell she was on about, her skirt and panties vanished into her skin, absorbed like they'd melted away. 

Now bottomless, her bare pussy glistened slightly under the lights as she grinned proudly.

"Cool, right? I've been working on this," she explained, gesturing to her now-naked lower half. "I can absorb my clothes back into my skin since I created a duplicate from my body's fat reserves. Instant undressing." 

"It's practical, saves time, and I can store extra fat for emergencies—like earlier when I nearly passed out."

Yami smirked, his golden eyes trailing down her body. "Smart for a cow," he said, his voice dripping with amusement as he began stripping off his clothes.

Once naked, he stepped closer, towering over her. His massive cock hung heavily, pressing against her stomach, and Momo's breath hitched. She was so close she could feel the heat radiating from it.

Yami grabbed her thick ass, squeezing hard, making her gasp. "There's some steak in the fridge," he said, his voice low and rough. "I'll heat it up."

He leaned in, his lips brushing against her ear as he whispered, "And while I'm eating, you're gonna get on your knees, choke on my cock, and let me fuck your throat until your makeup's ruined. Sound good?"

Momo's legs trembled, her nipples hardening against her top as she whispered back, "Yes… fuck, yes."

After heating up some steak and rice, Yami sat at the table, savouring his meal while Momo knelt naked beneath it. 

Her flawless skin glistened under the light, and her voluptuous, curvy, and thick body was on full display for him. 

Her massive tits, perfectly round and heavy, swayed slightly as she moved, their weighty curves adorned with faint droplets of saliva from her sloppy throat job. 

Her nipples were hard, the peaks begging for attention as they grazed against Yami's thighs with every thrust she made.

Her hourglass figure was a masterpiece, with a slim waist that flared out into wide, childbearing hips and a perfectly round, plump ass. 

Even from this angle, Yami could imagine the way her fat ass would jiggle under his grip, the kind of body built for breeding. 

Her thick thighs, soft and inviting, pressed together as if to contain the heat radiating from her soaked pussy. 

Every time she adjusted her position, her bare cunt glistened with fresh juices, dripping onto the floor.

Momo's long, dark hair cascaded over her shoulders, the strands sticking to her flushed skin as she struggled to fit Yami's monstrous cock into her mouth. 

Her throat bulged obscenely with every inch he forced down, her face red and covered in tears and spit. 

Her pink lips clung desperately to his cock, creating wet, obscene noises as she gagged and drooled around him.

"Goddamn," Yami muttered, glancing down at her body. Her curves were so exaggerated, so ridiculously perfect, it was as if she were sculpted to be nothing but a cock-hungry toy. 

She looked utterly lost in her task, moaning around his cock as if sucking him off was her life's purpose.

[I mean… it's not Uraraka's fat ass, but fuck, Momo looks hot as hell choking on your cock,] the system said putting a hovering panel in Yami's face.

[Oh, right. I'm a Harem System, remember? Let's make things more interesting while you're working on Uraraka's tight little ass.]

The new mission slammed into Yami's vision like a sledgehammer:

=====

[New Mission: Branded Bitch!]

Objective: Break Momo completely. No more boring panties or bras—convince her to wear nothing but slutty cow-print lingerie, bikinis, and cow accessories from now on. Make her accept her role as your personal cow.

Reward: Quirk Upgrade—Momo can create even more items while using far less fat, enhancing her utility and combat potential.

Failure: One random stat will drop by a point.

=====

Yami's lips curled into a smile as he rammed his cock one last time down Momo's throat, holding her head firmly in place. 

He groaned as his balls tightened, unleashing another volcanic load directly into her stomach.

Momo's throat worked desperately to swallow the flood of cum flooding her, loud, wet gulps echoing under the table. 

Her moans vibrated around Yami's cock, her body trembling as she clung to his thighs. 

Her face was a complete mess—spit dripping off her chin, tears streaking her flushed cheeks, mascara smeared to shit. She looked like the cum-drunk she'd been training to be.

He pulled out slowly, his cock glistening with her spit and his own cum. 

Momo gasped for air, coughing slightly but never taking her eyes off him. Her tongue lolled out, trying to catch any stray drops that leaked from his cock.

"Good girl," Yami said, gripping her chin and forcing her to meet his sharp, golden gaze. "Now listen, you're my cow. My personal fuck meat. From now on, I don't want to see you in anything but slutty cow-print lingerie. Cow bikinis, cow accessories—if it doesn't make you look like a cow for me, you're not wearing it. Got it?"

Momo's entire body shuddered as her pussy clenched, juices dripping down her thighs. 

Her voice trembled as she moaned out, "Yes, Master Yami… I'll be your cow. I'll wear whatever you want… Thank you for making me yours."

A ding echoed in his head as the system rewarded his "efforts":

[Mission Complete: Branded Bitch]

[Reward Unlocked: Momo's Quirk Upgrade—She can now create more objects while using less fat, giving her unmatched efficiency.]

[Goddamn, you're good at this!] the system snickered. [Oh, quick heads-up—tomorrow's the USJ incident. Shigaraki's had a little… upgrade. Nothing major...]

[-I mean, he got The Hand, but whatever, pff-,] 

[Just enough to keep things fun for you. Enjoy~.]

Yami ignored the system's message as Momo suddenly lunged at him, her tits bouncing as she pushed him onto his back. 

Her swollen, cum-filled belly pressed against his abs as she straddled his hips, her soaking pussy grinding against his cock.

"Master Yami," she whimpered, her voice thick with desperation. "Please… I need it. Let your cow ride your cock…"

Yami chuckled, his hands gripping her thick ass as he lined her up. Her slick folds dripped onto his cock, coating it in her love juices.

"Then ride it, cow," Yami said. "Prove to me you're nothing but my fuckable cow."

Momo screamed as she sank down onto him, her pussy stretched wide to take his massive cock. 

She clawed at his chest, her tits bouncing wildly as she rode him like a bitch in heat. Her moans filled the room, mixing with the sound of skin slapping against skin and the obscene squelching of her dripping cunt.

The USJ incident could wait. Tonight, Yami had a cow to fuck.