My Harem System In My Hero Academia

Yami woke up to the soft warmth of Momo's tits pressed against him. Her naked body clung to his, her breast rising and falling with each peaceful breath. 

The morning light filtered through the curtains, highlighting the messy sheets and the obscene evidence of their late-night activities—Momo's thighs glistened with Yami's cum, and a small puddle had formed beneath her.

Momo opened her dark eyes, grinning as she noticed his staring. "Two days out of three, Yami," she said, laughing softly. "Are you trying to knock up the heir of the Yaoyorozu family already?"

Yami smirked, brushing a strand of hair from her face. "And what if I am?"

Momo rolled onto her back, stretching lazily as she looked at the ceiling. "Good luck with that," she teased. "I'm on the pill, so all your efforts are just practice."

Yami chuckled, sitting up and swinging his legs over the side of the bed. "Guess I'll just have to keep practising."

After a quick shower together—filled with more playful touches than actual cleaning—they dressed and headed outside, where their usual limo awaited them. 

They climbed in, Momo adjusting her perfectly tailored school uniform while Yami leaned back, still half-asleep.

When they arrived at U.A., it was a mess. 

A sea of reporters crowded the front gates, microphones and cameras thrust into students' faces. 

The swarm was loud; their questions were shouted over each other so no one could actually understand what they were saying.

The reporters redirected their focus as soon as Yami and Momo stepped out of the limo. 

The flashes of cameras lit up like fireworks, and a wave of questions crashed over them.

"Iwatani Yami! How does it feel to be the top student in combat evaluations?"

"Miss Yaoyorozu, What does it feel like to be the first Yaoyorozu to be a hero in over a century?"

"Are the two of you dating? You arrived together in the same car!"

Yami smirked, wrapping an arm around Momo's waist just to rile them up. "No comment," he said smoothly, guiding Momo through the crowd as she blushed furiously but didn't protest.

They reached the gates unbothered; Yami's presence and sharp glare were enough to part the crowd. As they entered the school, Momo nudged him playfully. "You enjoy that way too much."

"Can you blame me?" Yami replied with a grin. "Besides, it's good practice for when we really give them something to talk about."

After arriving at their homeroom, Yami and Momo sat back in their usual seats and talked about Momo's shockwave grenades. 

They went back and forth, sharing ideas on how to make them better. Momo sketched some designs in her notebook while Yami leaned over.

"I still think you could've made them reactive to touch and height," Yami said, pointing at a sketch.

"Practicality first," Momo replied, adjusting her perfectly straight posture. "If you're so clever, maybe you should invent something, Yami."

Before he could retort, Aizawa-sensei entered the room. 

He looked his usual self—dishevelled and annoyed, dragging his sleeping bag along like it was part of his soul, and maybe it was.

"Good work with yesterday's battle training," Aizawa started, though his tone suggested he was anything but impressed. 

"I've reviewed your grades and evaluations." His sharp gaze moved towards Bakugo. "Bakugo, grow up already and stop wasting your talent."

While Aizawa went on about wasted potential and discipline, Yami's mind wandered. The system decided this was the perfect moment to pop in.

[Hello~ fucker~] The familiar blue panel appeared before him.

[I've been slacking off lately, and since your lust is at 100%, I can't threaten you with going kaboom. But, I really like thick white asses, so~]

Before Yami could mentally argue, the system updated Uraraka's mission, shortening the time limit to just a week.

[Bye~ Have fun ruining that innocent booty~] the system chimed, vanishing just as quickly, and then came back [Oh right, a hint, she likes it when you eat her out, and she also likes money. Bye ~]

Yami rolled his eyes but didn't dwell on it for long. Aizawa's voice snapped him back to reality.

"You'll pick a class president," Aizawa said lazily, rubbing his temples.

The class erupted into chaos.

"ME!" Kaminari yelled, standing on his chair.

"I WANNA BE PRESIDENT!" Mina shouted, her arms in the air like a cheerleader.

"IN MY ADMINISTRATION, GIRLS WILL HAVE TO SHOW 30 CM OF THIGHS!" Mineta added, earning glares from half the class.

"ME!" Sero joined in, though his reasoning was unclear.

"I'D LIKE TO DO IT," Iida declared, standing tall with his usual over-the-top seriousness.

Yami turned to Momo, who was staring out the window, clearly lost in thought. He nudged her shoulder. "Hey, you gonna go for it? Class prez sounds like your thing."

Momo blinked, snapping out of her daydream. She thought for a moment, tapping her pen against her lips. "Well, it is quite the position, but I don't think I could handle the responsibility… On the other hand, it would feel even better being degraded by you if I held some power. Quite the dilemma."

Yami raised an eyebrow, smirking. "When did things go wrong with you?"

"Well, It all started years ago when I watched my best friend eating out his mother and..." Before Momo could go off on one of her tangents, Iida shouted from the front of the room. 

"An election is the only fair way to determine leadership! Everyone should vote!"

Aizawa, already halfway into his sleeping bag, muttered, "Fine. Do it quick and quiet."

Fifteen minutes later, the votes were tallied. The results were simple: Yami and Jiro each had two votes, while Momo had three.

"Ha! Knew Momo would win," Kaminari said with a grin. "She's got that whole 'responsible and hot' vibe."

"Three votes?" Mineta muttered, glaring at his ballot. "I thought for sure my platform would win!"

"Who even voted for me?" Jiro asked, genuinely confused.

"Wasn't me," Yami said with a budging Momo's shoulder and "accidentally" hitting her chest. "But congrats, Momo. You're in charge now."

Momo's face lit up, a mix of pride and panic washing over her. "I… I'll do my best!" she stammered, standing and bowing politely.

Aizawa peeked out from his sleeping bag, giving a tired thumbs-up. "Congrats, Class President Yaoyorozu. Now… let me sleep."

The class cheered half-heartedly. Yami leaned back in his chair, smirking as he watched Momo try to hide her excitement.

"You'll do great," he said, just loud enough for her to hear.

Momo blushed and was already getting excited at the thought of her future.

After that, the class went on like normal, with Aizawa droning on about the basics of hero law. 

By the time the lesson wrapped up, everyone was ready for lunch, and the class headed to the Lunch Rush cafeteria. 

Momo, now popular among the girls thanks to her new position as class president, was quickly surrounded by them. 

Yami decided to let her enjoy herself and took the chance to "socialize" with the guys instead... Kind of.

Mineta and Bakugo clearly hated his guts. Midoriya and Iida, while more subtle, didn't seem too fond of him either. At least the others were neutral, if not indifferent.

When he reached the cafeteria, Yami scanned the room and quickly spotted Midoriya, Iida, and Uraraka sitting together. He made his way over, catching part of their conversation as he approached.

"But I thought you wanted to be class president, Iida?" Uraraka asked, her cheeks puffed out as she stuffed her face with rice. She looked adorable, completely focused on enjoying her food.

"Sup," Yami interrupted, standing beside the table with a grin. "Iwatani Yami. Mind if I join you?" Without waiting for an answer, he pulled out a chair and sat down.

Midoriya leaned forward and asked, "What's your Quirk, Iwatani?"

Before Yami could reply, a loud screech was heard through the cafeteria. Then an announcement followed, "Security Level 3 has been breached. All students, please evacuate in an orderly fashion."

The room burst into chaos. Students panicked, shouting and pushing each other as they tried to rush out.

Yami quickly scanned over the room looking for Momo, eventually finding her, trying to calm everyone down.

Then Yami spotted Uraraka, who was caught in the crowd. She looked small and scared as students pushed past her.

Yami didn't think twice. He moved through the crowd, reaching her in seconds; wrapping his hands around her waist, he pulled her close to him. "You okay?" he asked, steady and calm.

Uraraka's cheeks turned pink as she nodded, her voice soft. "I-I'm okay. Thank you…"

Just then, Momo's voice boomed through the cafeteria. She had created loudspeakers with her Quirk and was using them to tell everyone, "It's just the press. Please stay calm and return to your seats."

Slowly, the chaos died down. Students stopped pushing and returned to their places. The teachers intervened to manage the situation, and everyone returned to their classrooms.

Once inside, Momo and Jiro checked to ensure everyone was safe, while Aizawa was already asleep in a corner. 

As Momo handled her class president duties, Uraraka sat quietly at her desk. She couldn't stop thinking about Yami. 

His arms had felt so strong and safe around her. A strange warmth spread through her belly, making her blush whenever she remembered how close they had been.

After Momo confirmed that no one was absent, she turned to Aizawa. "Everyone's accounted for. Should we resume as planned, Sensei?"

Aizawa groaned as he slowly crawled from his sleeping bag, dragging himself toward the whiteboard with an exhausted expression. 

He picked up a marker and yawned mid-sentence, "Alright, for today's basic hero training… All Might, myself, and one other instructor will be supervising."

Sero raised his hand from the back. "Uh, what exactly are we doing?"

Aizawa, still dragging his words, replied, "Disaster relief. Fires, floods… the whole rescue package. We're focusing on practical rescue training this time."

The class erupted into chatter.

"Rescue, huh? Sounds like another rough day," Kaminari said.

"Right! This is what being a hero's all about!" Kirishima said, clenching his fists with enthusiasm. "I'm pumped!"

"I'll be right at home in a flood. Ribbit," Asui added.

Before anyone else could chime in, Aizawa's glare silenced the room. "Hey, I'm not finished." His sharp eyes scanned the class, ensuring everyone got the message.

He continued, "It's up to you whether or not you wear your hero costumes. Some of your costumes might be ill-suited for this kind of activity, so think carefully."

Aizawa capped the marker and stepped away from the board. "The training site is a bit remote, so we'll be traveling by bus. That's all. Get ready and meet outside."