My Harem System In My Hero Academia

It was late, the kind of late when the world felt heavier and quieter. Momo and Yami walked side by side through their favourite park, the chilly air biting at their skin. 

The park was deserted, just as they liked it. There was something comforting about the way the trees swayed softly in the wind and the faint glow of the distant streetlights.

Momo fidgeted with her sweater as they walked. She'd picked it deliberately—a thick pink one with a large turtleneck and decorative brown straps that pulled snugly across her breasts. 

It hugged her big boobs, accentuating them even more. Her black leggings clung tightly to her legs and ass, leaving little to the imagination, especially with her thin underwear barely concealed. 

Her nipples, hard from the cold—or maybe something else—pressed visibly against the fabric.

She felt exposed in more ways than one. Her heart raced with anticipation; every step put her closer to a decision she'd wrestled with for years. 'Tonight's the night'

Yami, on the other hand, seemed relaxed. He wore his usual black-and-yellow aviator jacket, a plain yellow t-shirt underneath, and loose black jeans. 

His hair was a mess, but it suited him. To be honest, when one is as good-looking as he was, there weren't too many haircuts that didn't suit him.

They'd been walking in silence for a while when Momo stopped abruptly, grabbing Yami's sleeve.

"Yami…" Her voice trembled slightly, but she quickly steadied herself.

Yami turned to face her, raising an eyebrow. "Yeah, that's me," he said, smirking like an idiot before realizing her expression was dead serious. He dropped the clown act immediately. "What's up?"

Momo's grip tightened on his sleeve. Her cheeks flushed, and she hesitated; her dark eyes shone under the glowing streetlight, and a breeze flew past them. 

She took a deep breath as if steadying herself for what she was about to say.

"I know about you and Angela."

The words hung in the air. Yami froze, his golden eyes narrowing as his brain caught up. "...For how long?" he said with a sigh.

Momo didn't flinch. "I've known for years, Yami. Since we were kids. I saw you two once, back when I came over to play."

Yami's stomach twisted, his mind racing. He tried to remember that day, but Momo quickly answered for him.

"You didn't notice, I came over to play back when we were kids; my fencing classes and extracurriculars were cancelled, So I came over without calling and walked in while..."

Momo blushed, embarrassed to say it out loud, "While you were eating her...pu...pussy..."

"You—" Yami started, but Momo cut him off.

"I didn't say anything because… I didn't know how to handle it. At first, I thought maybe I imagined it, but the more I paid attention, the clearer it became." She looked away for a moment, her cheeks burning. "It drove me crazy."

Yami opened his mouth to speak, but she kept going, her words spilling out like she'd been holding them back for years.

"I kept asking about your home life, hoping you'd tell me yourself. I tried everything—pestering you, teasing you—but you never opened up. I thought if I could get close enough, maybe… maybe you'd see me the same way."

Momo's voice faltered, but she pushed through. "Ever since middle school, Yami, there hasn't been room in my heart for anyone else. It's always been you. No one else matters."

Yami stood there, stunned into silence. He wasn't used to seeing Momo like this—so raw, so vulnerable. 

She was always composed, the girl with all the answers, but now she was standing before him, laying everything but her body bare.

Momo took another deep breath, her hands trembling slightly as she reached for the hem of her sweater. "I need you to understand," she said softly, lifting the fabric.

Yami's eyes widened as she pulled the sweater up, revealing her flat stomach and big breasts. 

Drawn just above her pelvis, in black marker, was a crude but unmistakable symbol: a heart, with the words Yami's Property written above it.

Her voice was shaky, but her words were firm. "This is who I am now. My body, my heart, my soul—they're yours." 

"If all I ever am to you is a maid, watching you with other women, I'll accept it. But I can't keep pretending I don't feel this way. It's eating me alive."

Yami's chest tightened as he stared at the marker on her skin, her words echoing in his head. For a moment, he thought back to Angela and then at his father. 

He didn't know how to respond. Part of him wanted to shake her, tell her she was being ridiculous, and tell her this kind of obsession wasn't healthy. 

But another part of him—knew Momo would just end up like Angela; it was his duty to prevent that.

"Momo…" he finally said, his voice low. "You don't know what you're asking for."

"I do," she insisted, her eyes locking onto his. "I've thought about this for years. I'm not some naive little girl, Yami. I know exactly what I'm getting into."

"You think you can handle it?" he asked, stepping closer. His golden eyes stared into hers, searching for any sign of doubt. "You think you can handle me?"

Momo didn't back down. She stood her ground, her chest rising and falling with each shaky breath. "I'll do whatever it takes."

The silence between them grew more and more when neither answered or backed down. 

Momo was trembling with her boobs naked before Yami and her pussy was soaking through her thin black underwear.

The world around them seemed to fade away, leaving only the two in that moment.

Finally, Yami reached out, his fingers brushing against the crude marker drawing on her skin. Momo shivered at his touch, her breath hitching.

"You're serious about this?" he asked, his voice rough.

Momo nodded, her eyes never leaving his. "Completely."

Yami's hand lingered on her skin for a moment longer before he pulled away, shoving his hands into his pockets. "Fine," he said, his tone flat. "But don't say I didn't warn you."

Momo's face shone with a small, relieved smile. "Thank you," she whispered, pulling her sweater back down.

Yami turned and started walking, his hands still buried in his pockets. "Come on," he called over, playing it cool.

[YOU DUMBASS SHE WANTS THAT COCK INSIDE HER!]

Yami sighed, his golden eyes scanning the empty street as he walked. 

[I don't get it. I'm seriously struggling here. You had her. Right there. Practically begging for it. So why the hell did you walk away?]

Yami shoved his hands deeper into his pockets, exhaling sharply through his nose.

"Because that's not how I do things," he muttered.

[What the hell do you mean? This is exactly how you do things. You're telling me you didn't want to push her up against a tree, rip those leggings off, and fuck her pussy until she passed out, bring her back for more, go to a public bathroom and fuck her over a—]

'Of course, I wanted to,' Yami cut in sharply, his tone leaving no room for argument. 'But I'm not some animal who can't control himself.'

The System fell silent momentarily before its voice returned, quieter and more measured.

[Then explain it to me, Yami. Because right now, it sounds like you're holding back for no good reason.]

Yami stopped walking and glanced over his shoulder to check that Momo was still following him. 

She was, her cheeks flushed from the cold and her dark eyes filled with lingering emotions from their conversation. Satisfied, Yami turned his attention inward, addressing the System directly.

'I need to tell Angela first,' he said firmly. 'She's been with me from the start. She's given up everything for me. I owe her the respect of telling her face-to-face that Momo's part of this now.'

The System was uncharacteristically quiet. Yami continued, his voice softening.

'Momo's been obsessed with me for years. I knew that. But I've always been careful not to make her feel like she's just another girl in my life. She's more than that.' He glanced back at Momo again, watching as she adjusted her turtleneck, her eyes catching his briefly before she smiled shyly. 'She deserves something real. Not some rushed, heated fuck in a park.'

Another long silence stretched out before the System finally spoke again.

[...]

[I get it.]

Yami raised an eyebrow in surprise. "You get it?"

[Yeah, yeah, don't make me repeat myself. I get it, alright?]

Yami smirked. 'Glad you finally caught on.'

[Alright, you earned this one.] The System's tone shifted—even though it didn't have a voice—almost sounding proud.

[Population Control: Quirk Technique—Granted!]

Yami's eyes widened slightly as the familiar notification appeared before him.

[Quirk Technique Unlocked: Population Control]

[Description: Allows the user to suppress or activate the reproductive systems of any living being they touch. Perfect for ensuring no accidents happen—or for making sure they do.]

"Not bad," Yami murmured, the corner of his mouth twitching into a grin. "Thanks."

[Don't mention it. Seriously, don't. I have a reputation to uphold.]

Yami chuckled softly, his mood lightening. "Noted."

Just then, Momo ran behind him and hugged him from the back tightly, and Yami smiled as he turned around to hug her, too.

[Cooking Rice]