My Harem System In My Hero Academia

After walking back into the stadium, Yami checked his Lust Meter.

[100%]

[Yes, you're getting the power-up.]

[Also, don't be an idiot. They're buffed now, so don't rush in blindly. Check her out before the fight.]

Yami glanced over at Setsuna Tokage, who had arrived before them. She walked a few steps ahead of him and Momo, her hips swaying slightly as she moved.

She had an average height, but her body was well-toned. Her dusky green eyes were upturned, framed by long lower lashes, giving her a sharp, almost mischievous look. 

Dark moss-green hair cascaded just below her shoulders, with one thick lock hanging in the centre of her forehead. The rest of her hair got thinner and wavier the lower it went.

She wasn't as thick as Momo, but her waist was slimmer, and her curves were sharp rather than soft.

[Not like that, idiot!]

Yami sighed, ignoring the system's scolding as they reached the stadium just as Cementos was finishing up the battle stage. 

The massive concrete platform now had a few uneven pillars sticking up, likely to add some vertical movement to the fight.

Before he could take in the layout, a man in a black suit jogged up. The guy looked like some intern fresh out of business school, sweating like crazy under the hot sun.

"You need to head into the tunnel," the man said quickly, pointing to one of the two entrances leading to the arena floor.

Yami cracked his neck and gave Momo's ass a quick squeeze, earning himself an eye-roll and a slight smirk from her before he headed to his designated tunnel.

Inside, the cool shade provided some relief from the sun. Yami leaned against the wall, waiting for Present Mic to announce the match. 

His golden eyes glowed slightly in the dim light, his body buzzing with anticipation.

Then, the speakers boomed to life.

"ALRIGHT, LADIES AND GENTLEMEN! IT'S TIME FOR THE FIRST MATCH OF THE FINAL ROUND!"

The crowd erupted, the air thick with excitement. Yami could hear their cheers vibrating through the tunnel walls.

"ON ONE SIDE, WE HAVE THE MYSTERIOUS, THE DANGEROUS, THE BEAST OF CLASS 1-A… YAMI IWATANI!"

More cheers. A few boos. Some of the crowd didn't like him; only the snail knew why.

"AND ON THE OTHER SIDE, REPRESENTING CLASS 1-B, THE SLICED-UP, SPLIT-UP, UNPREDICTABLE BADASS… SETSUNA TOKAGE!"

The crowd roared even louder. Class 1-B had been waiting for a chance to prove themselves, and Setsuna was one of their best fighters.

Yami stepped out of the tunnel, walking casually onto the battlefield like he didn't have a care in the world. Across from him, Setsuna was already waiting.

She cracked her knuckles, flashing him a sharp-toothed grin. "Don't think I'll go easy on you, Iwatani."

Yami smirked. "I'd be disappointed if you did."

Midnight raised her whip. "ARE BOTH FIGHTERS READY?"

Yami rolled his shoulders. "Yeah."

Setsuna bounced on her feet, stretching out her arms. "Let's go."

Midnight cracked the whip.

"START!"

The instant the match started, Setsuna's body exploded into pieces. Her arms, legs, and head separated, floating in the air as she controlled them independently.

The moment the match began, Setsuna's body burst apart, her limbs, head, and torso separating mid-air, hovering like a swarm of flying weapons under her control.

Her right leg shot forward like a missile, aimed straight at Yami's chest.

Yami grinned. "Oh, we're starting like that?" he said as he smoothly sidestepped the kick, but Setsuna wasn't done.

Her left arm came swinging in from his blind spot, aiming for his ribs. 'Smart. She's not just attacking—she's setting up traps and follow-ups, reminds me of Momo's early days at Kendo.'

Instead of dodging, Yami raised his left arm and petrified it, letting the attack bounce off like it was hitting solid rock.

Setsuna's severed hand slammed into his forearm while Yami barely felt the impact.

"That all you got?" he taunted, and moments later, he noticed Setsuna was smiling.

Before he could react, a sharp snapping sensation ran through his arm, and his left forearm—from the elbow down—fell to the ground.

The entire stadium gasped.

Yami blinked.

Then blinked again.

"...Huh."

Cementoss and Midnight immediately stepped forward, ready to cancel the match.

"WAIT!" Setsuna panicked, waving her arms. "DON'T STOP THE MATCH! HE'S FINE!"

Midnight narrowed her eyes. "Fine? His arm just fell off." Setsuna held up her hands. "I-I forgot to explain—my quirk, Lizard Tail Cut, lets me detach and control my body parts, right?"

Cementoss frowned. "And?"

Setsuna gulped. "I can also… apply it to other things. Objects, weapons, people."

A wave of murmurs rippled through the crowd.

Midnight's eyes sharpened. "For how long?" she asked as Setsuna's face reddened from embarrassment. "An hour at most," Setsuna said quickly. "And I can reattach anything I cut! There's no pain, no blood, nothing!"

Yami, still holding his severed arm like a baseball bat, finally spoke. "Oh. Cool trick."

Setsuna blinked. "That's it? Cool trick?!"

"Yeah, I mean—" Yami tossed his own severed arm over his shoulder and stretched his good one. "Tis but a scratch."

The audience erupted.

"THIS GUY'S INSANE!"

"HE JUST THREW HIS OWN ARM LIKE TRASH!"

"HOW IS HE NOT FREAKING OUT?!"

Cementoss and Midnight exchanged glances, and then Midnight sighed, shaking her head. "Fine. Match resumes!"

Yami grinned. "Alright, Bluetooth girl, round two."

Setsuna still looked at him like he was crazy, but the fight was back on.

Yami rolled his shoulder, adjusting to the sudden loss of his left arm. He grinned, his golden eyes glinting. "So, you can cut other people apart, huh?"

Setsuna smirked, already sending her severed limbs flying at him again. "You bet! And I'm just getting started!"

Her right leg shot towards his ribs while her left arm swung in from above like a hammer. Yami didn't even move—he just let his body go limp at the last second, dodging the leg while the arm sailed past his head.

'Sloppy,' he thought. 'She's attacking like a wild animal. No rhythm, no precision. Just throwing everything at me and hoping something sticks.'

As soon as her limbs passed him, he saw an opening. He dashed forward, closing the gap between them in a blink. Setsuna gasped, scrambling to pull herself back together, but she was too slow.

Yami's fist shot out, aiming straight for her gut.

But before it could land, her torso split apart at the waist, separating her upper and lower body. The punch passed harmlessly through the empty space where her stomach should've been.

Yami raised an eyebrow. "Alright, that was kinda cool."

Setsuna smirked. "I know, right?"

Her legs reattached, and she launched herself backwards, creating more distance. "You're fast, but I can keep moving too. I can split as many times as I need! You won't lay a finger on me!"

Yami cracked his knuckles. "Yeah? We'll see about that."

Setsuna shot forward again, her body bursting apart mid-air. Her head hovered above him, her arms attacked from the sides, and her legs twisted through the air like whips.

Yami stood his ground, eyes tracking each piece. 'She's trying to overwhelm me, make me panic. Too bad for her.'

As her hands came flying in, Yami finally moved. He stepped in, twisting his body, dodging her limbs by the smallest margins. 

His golden eyes gleamed as he predicted her movements, ducking under a floating leg before pivoting sharply to avoid her torso.

Then, he saw his moment.

He reached out with his good arm, grabbing her left ankle.

The moment his fingers touched her skin, he activated Vaporizing Freezing.

A burst of cold shot through her leg, and in an instant, ice spread up her calf, trapping her in place. Setsuna's eyes widened as her movements jerked to a stop. "What the—?!"

Yami didn't let her finish.

He yanked her frozen leg downward, slamming her into the ground like a sack of bricks as the stadium gasped.

Setsuna groaned, coughing as she lay on the floor. "H-Holy shit…"

Yami wiped his nose, smirking. "Not used to getting hit, huh?"

Setsuna grits her teeth, prying herself free from the ice by detaching her leg entirely. She reassembled herself a few meters away, standing on one foot as her frozen limb remained stuck on the battlefield.

Yami twirled his severed left arm in his remaining hand, using it like a club. "So? Still think you can keep dodging forever?"

Setsuna frowned, rolling her shoulders. "Tch… I was hoping to toy with you a little longer, but I guess I gotta get serious."

She took a deep breath, and her whole body exploded into dozens of pieces.

Not just her arms and legs—her torso split apart, too, turning her into a swirling storm of floating body parts.

Yami watched as her fingers and even her toes hovered in midair. "Huh," he muttered. "That's kinda gross."

Setsuna blushed as her disassembled pieces shot toward him from all angles, like a hailstorm of fists and feet.

Yami narrowed his eyes. He could dodge some, but not all. His body tensed.

Then, his golden irises flashed purple and red.

"Space Ripper!"

Twin pressurized fluid jets shot from his eyes, slicing through the air. The razor-thin beams cut through Setsuna's limbs like a hot knife through butter.

The stadium gasped as a dozen of her floating body parts split apart mid-air, severed in half.

Setsuna's smirk vanished. "WHAT THE HELL?!"

Her pieces fell to the ground, twitching slightly. The crowd exploded with shouts and whispers.

"Did he just—?" "Did he cut her up?!" "Is she DEAD?!"

Yami sighed, rolling his eyes. "She's fine," he said flatly.

Sure enough, Setsuna's severed parts twitched and then wiggled toward each other like little crawling bugs.

She reassembled herself quickly, standing up with wide eyes. "What the actual hell was that?!"

Yami smirked. "What? You can't shoot lasers out of your eyes?"

Setsuna gritted her teeth. She was panting now, her breathing heavy, her legs slightly shaky. 

She had been reckless, trying to overwhelm Yami with speed and sheer numbers, but he wasn't some regular fighter. 

He adapted too fast. He was watching, learning, and now, he was starting to counter her. Worse, he had moves she had never seen before. 

That weird freezing attack had completely shut her down for a moment, and now, his laser eyes? They were slicing her apart mid-air like it was nothing. 

She clenched her fists, knowing she had to change her strategy. If she kept fighting the same way, he'd keep cutting her up, and eventually, she wouldn't be able to put herself back together.

Yami rolled his shoulders, feeling relaxed, like he was warming up. He knew Setsuna was running out of ideas; her face was frustrated, and her movements were getting sloppier. 

She was good, no doubt, but her quirk had a major weakness—it didn't let her hit hard enough. 

Separating her body made her unpredictable, but it also weakened her attacks. A punch from a floating fist didn't have the weight of a full-body swing. 

A kick from a detached leg lacked the force of proper footwork. She had speed, mobility, and creativity, but against someone like Yami, who could take a hit or get his arm chopped and keep going, it wasn't enough. 

Yami smirked, stepping forward slowly, his golden eyes locking onto hers like a predator sizing up its prey. "What's wrong, Bluetooth? You start to realize you can't win?" he taunted, his voice calm, almost lazy.

Setsuna growled, her pride refusing to let her back down. 

Yami let out a dramatic sigh, rolling his shoulders as if bored. "This is getting old," he muttered. 

"You had a good plan, Bluetooth girl, but you're running out of tricks." His golden eyes locked onto her, glowing faintly in the sunlight. "So, let's wrap this up." 

Before Setsuna could react, he burst forward, his speed catching her off guard. She tried to scatter her body again, but she was a split second too slow. 

Yami grabbed her by the waist, gripping her tightly before she could break apart. His fingers dug into her toned stomach, holding her in place as she struggled against his iron grip.

Setsuna panicked, trying to twist out of his grasp, but it was useless. Yami activated Vaporizing Freezing, and ice spread rapidly across her lower half, locking her legs together. 

She gasped, her breath hitching as she realized she couldn't move. "Iwa-Iwatani, wait—!" she started, but Yami wasn't stopping. 

He lifted her into the air with one arm, her body weightless in his grip, before spinning her around and slamming her back into the ground with a loud THUD. 

The entire stadium winced at the impact, watching as a cloud of dust shot up from where she hit the ground.

Setsuna groaned, her body aching from the slam. Her vision blurred for a moment, but when it cleared, she realized Yami hadn't let go. He was still holding her waist, his grip firm but not crushing. 

She tried to break apart again, but her frozen lower half wouldn't respond. She was stuck. 

"Still wanna keep going?" he asked. His tone wasn't mocking—just confident, like he already knew the answer. Setsuna clenched her jaw, frustration flashing across her face. 

She had put up a good fight, but there was no getting around it. He was stronger, faster, and completely unfazed by anything she had tried.

With a deep sigh, she relaxed, lifting her hands in surrender. "Fine," she muttered. "I give up." 

The stadium erupted with cheers, the crowd loving the brutal yet efficient way Yami had dominated the match. 

Midnight stepped forward, raising her whip. "SETSUNA TOKAGE HAS SURRENDERED! YAMI IWATANI ADVANCES TO THE NEXT ROUND!" The cheers grew even louder, but Yami didn't react much. 

He simply let go of Setsuna and stood up, dusting off his pants like nothing had happened. As he turned to walk away, Setsuna sat up, rubbing her sore ribs. 

"Next time," she muttered, "I'm gonna make sure I don't lose so fast." Yami only smirked over his shoulder. 

"Sure. Just don't let me cut you up so easily." Then, without another word, he walked off the battlefield, already thinking about his next fight with the princess boy.