My Harem System In My Hero Academia

Hey everyone! Snail here.

I just want to take a moment to thank each of you who've been here since day one. When I started this fanfic, I never expected it to grow the way it has, and the amount of support you've all shown has been incredible. I can't even put into words how much I appreciate it—truly, thank you.

To show my gratitude, I made sure this chapter is something special. I poured everything into it while I cooked it, and I hope you enjoy it just as much as the rest of the fic—and continue to enjoy what's to come! Original villains, character development, remix of characters from other IPs. 

I hope you'll continue to stick around for what's to come.

Sincerely,

Snail, GhostGirlFucker

====

After Yami's match, the rest of the fights went by without much trouble.

Shoto Todoroki vs. Denki Kaminari. Todoroki won instantly by dropping a giant iceberg on Kaminari's head.

Ochaco Uraraka vs. Katsuki Bakugo. Bakugo won, but Ochaco put up one hell of a fight. She had a solid strategy, using her quirk to create a zero-gravity minefield, but in the end, Bakugo blasted through it. 

Still, she made him sweat more than most people could say.

Eijiro Kirishima vs. Kyoka Jiro. Kirishima took the win. Jiro's sound attacks didn't damage enough to break through his Hardening, and once he got in close, she didn't stand a chance. She fought hard, though.

Momo Yaoyorozu vs. Mina Ashido. Momo won.

'Of course, she did. She's my cow!' Ashido was fast and unpredictable, but there was nothing acid could do against 20 grenades to the face.

Tenya Iida vs. Hitoshi Shinso. Shinso took the win. Iida answered one of his questions like an idiot and got mind-controlled, walking straight out of bounds. 

The crowd was initially confused, but after Midnight explained Shinso's quirk, everyone realized what had happened. Too bad for him, though—his trick was out in the open now. No way anyone else was falling for it next round.

Yui Kodai vs. Mashirao Ojiro. Ojiro dominated this fight. His Water Stream Rock Smashing Fist was the real deal, something Yami had only seen hints of before. 

Kodai tried to counter with her quirk, but it didn't matter. Ojiro's technique was too solid. Yaami made a mental note—' I needed to learn one of those flashy martial arts. They were definitely a One Punch Man reference, and I won't about to let Ojiro be the only one flexing them.'

Itsuka Kendo vs. Hanta Sero. Kendo came out on top, using Void Fist, another martial art that caught Yami's attention.

With the first round over, the stadium took a short break before the quarterfinals.

Yami leaned back in his seat, arms crossed, watching the giant screen display the next matchups. The fights were going to get tougher from here.

Yami Iwatani vs. Shoto Todoroki.

Katsuki Bakugo vs. Eijiro Kirishima.

Momo Yaoyorozu vs. Hitoshi Shinso.

Mashirao Ojiro vs. Itsuka Kendo.

Yami smiled; his fight with Lady Boy Todoroki was up next. Time to see if his little pep talk had woken him up. If he still refused to use his flames, Yami would make him regret it.

The crowd buzzed with excitement as the loudspeakers crackled to life.

"Alright, folks!" Present Mic's voice boomed through the stadium. "We've got eight fighters left, and it's only getting crazier from here!"

Yami stood up, stretching his arms as he made his way toward the tunnel. His mind drifted, wondering if now was the right time to reveal Gear Two or if he should keep it a secret for later. 

His hands sank into his pockets as he yawned, walking lazily through the halls, not in any rush.

As he turned a corner, he nearly bumped into Endeavor.

The two stopped, facing each other in the dimly lit corridor. The air grew thick, tension crackling between them like static before a storm. 

Yami's golden eyes narrowed, and Endeavor's fiery gaze locked onto his, neither looking away. It felt like they were sizing each other up, two animals ready to rip into each other.

Then Endeavor broke the silence.

"Your quirk," he said, voice deep and rough, "has more potential than you realize. It's versatile. Raw power, adaptability. In a way, it reminds me of my own."

Yami scoffed, tilting his head slightly. "Yeah?" His tone was flat, unimpressed, "Didn't even notice."

Endeavour didn't seem to care about his reaction. He continued, crossing his arms over his massive chest. "Quirks like ours can be pushed beyond their natural limits. Strengthened, refined. A simple ability can become something unstoppable in the right hands."

Yami leaned on his back. "That supposed to mean something to me?"

"It should," Endeavor said, his voice firm. "Shoto is going to surpass All Might. That much is certain. But a fight against you might be the experience he needs to take that step forward."

That was it.

That was the moment Yami's blood started to boil. His fists clenched inside his pockets, his jaw tightening. He wasn't looking at Endeavor anymore. He was looking at someone else—someone who had said a similar thought process.

His father.

Akio Iwatani.

That bastard.

The words hit like a slap, dragging up memories he buried deep like the man himself.

Yami exhaled slowly through his nose, pushing down the rage bubbling in his gut. He locked eyes with Endeavor again, his smirk returning—but it wasn't friendly. It was sharp. Cold.

"You've got it all wrong," Yami said, his voice steady. "It's not a son's job to carry his father's sins. It's his job to correct them. To never make the same mistakes, to be better yet not the same."

Endeavor's brows twitched slightly, but he stayed silent.

Yami stepped forward, close enough to feel the heat radiating from Endeavor's body. "And just so you get it through that thick skull of yours—I'm winning this match. Not for some' lesson.' Not to help your son 'grow.'"

He leaned in slightly, his grin widening.

"I'm gonna win to show you the difference between a man and a lost little lamb."

He turned away without another word, shoving his hands back into his pockets as he walked off toward the arena.

Behind him, Endeavor said nothing.

But Yami could feel the weight of his stare.

Yami walked onto the stage, the crowd's roar vibrating through the stadium. His golden eyes flicked toward the stands, where he spotted Momo sitting comfortably with an absurdly oversized bucket of popcorn balanced on her lap and an equally ridiculous extra-extra-large bottle of Soda-Cola propped against her chair.

Yami smirked. 'Of course she did.'

Then his expression hardened. This wasn't the time to get distracted. 

His eyes locked onto Todoroki, who had just stepped onto the field. The moment their gazes met, the temperature around them plummeted.

Tiny ice droplets formed in the air, falling softly around them like frozen mist. The ground beneath their feet started to frost over. They hadn't even moved yet, but the tension was suffocating.

Midnight, standing at the edge of the battlefield, shivered slightly. She had already been frozen once today by Todoroki, and she wasn't planning on letting it happen again. 

This time, she stood closer to Cementoss, just in case.

Cementoss cleared his throat. "Are the participants ready?"

"Yes," both Yami and Todoroki answered simultaneously, eyes never leaving each other.

Midnight raised her whip and cracked it against the air. "BEGIN!"

Todoroki wasted no time. He lifted his right hand, and a massive ice wall shot toward Yami at blinding speed, expanding across the battlefield like a frozen tidal wave. 

It swallowed Yami within seconds, covering a huge chunk of the arena in jagged frost.

The crowd gasped.

"Did he just—?"

"Did the match already end?!"

A tense silence hung in the air. Then, suddenly, a pulse of red and purple light burst from inside the ice.

The entire frozen mass shook violently before shattering apart in a violent explosion of shards. Yami emerged from the wreckage, his body unharmed, his hands petrified into obsidian-like blades.

The pieces of ice rained down like glass, reflecting the stadium lights in brilliant flashes as Yami's eyes petrified and depetrified, his golden eyes shining like two golden suns.

Yami dashed forward, his movements impossibly smooth despite the frost-covered ground. He closed the gap between them in a heartbeat, aiming a petrified slash straight at Todoroki's torso.

Todoroki barely managed to react in time, twisting his body and coating himself in another layer of ice as Yami's blade crashed against it. The impact sent a sharp CRACK through the air, but Todoroki used the force to push himself back, sliding several feet away.

Yami grinned. "Are you afraid of another scar? Brittle Bones?"

Todoroki didn't answer. He raised his hand again and fired another wave of ice, aiming to freeze Yami mid-charge.

Yami dodged, weaving between the incoming spikes. He moved like a shadow, never losing speed, never slipping, even as the battlefield turned into an icy wasteland. 

Todoroki tried to trap him in place again, lowering the temperature even more, but Yami had already predicted it.

At the last moment, Todoroki swept his hand low, and the ground beneath Yami's feet turned into a frozen prison. His legs were locked in place, the cold seeping through his pants instantly.

The crowd held their breath.

But Yami only sighed, shaking his head. "You know," he said, his voice loud enough to carry through the stadium, "people think ice is tough. Strong. But when exposed to extremely cold conditions, ice actually becomes brittle and prone to cracking."

Todoroki's eyes narrowed.

Yami smirked. "Let me show you."

Before Todoroki could react, Yami activated Vaporizing Freezing at full power.

A wave of frost spread from his legs outward, merging with the ice Todoroki had trapped him in. But instead of strengthening it, the reaction weakened it. Tiny fractures spread across the surface in a spiderweb pattern before—

"CRACK"

The ice around Yami's legs shattered completely.

Without missing a beat, Yami kicked off his shoes and showed how he had been walking just fine on the ice-covered field; he had petrified his feet and put them into a special position. Now, he had ice skates.

The crowd lost it.

"Did he just—"

"He made skates?!"

Yami took a testing step, gliding smoothly across the battlefield, his movements even faster than before now that his feet were free.

He grinned at Todoroki. "Hope you like hockey."

Todoroki barely had time to react before Yami shot toward him at blistering speed.

Using his new skates, Yami twisted his body mid-glide, swinging his petrified hand toward Todoroki's ribs. The ice cream raised a thick wall of frost in defence, but this time, Yami didn't stop. He jumped off the ice, flipping mid-air before bringing his foot down.

The ice shattered beneath him, sending shards flying everywhere.

Todoroki stumbled back, forced to retreat again. He was fast, but Yami was faster now.

"You're holding back," Yami said, skating toward him again. "You're still not using your flames."

Todoroki gritted his teeth but didn't answer.

Yami hated that look. That stubborn, conflicted, pathetic look.

"You think your fire belongs to your father?" Yami sneered. "You think using it makes you like him? Are you that weak? Are you that naive and stupid?"

Todoroki clenched his fists.

"You were born with both sides," Yami continued, circling him like a predator. "Fire and ice. But you refuse to use one because of daddy issues? That's pathetic."

Todoroki snapped.

Without a word, he slammed his hands against the ground, unleashing a massive, blinding wave of ice in every direction.

The entire battlefield turned into a frozen wasteland within seconds.

And just as fast, Yami tore through it as he screamed, "Space Ripper!" cutting the collums of ice clean in half.

"This is boring!" he shouted. "Where's the fun?! Where's the heat?!"

Todoroki's breathing was ragged now, his body covered in frost. His right side—his ice side—was working overtime, overcompensating.

But he still refused to use his left.

Yami sighed, stopping a few feet away from him. He crossed his arms, his golden eyes glowing.

"Alright, I'm done playing around," he said, cracking his neck. "You will use your flames in this fight."

Todoroki's eyes burned with frustration. "I won't."

Yami smirked. "Then I'll make you."

Before Todoroki could react, Yami charged.

With his ice skates giving him a speed boost, he closed the distance in a blink.

Todoroki raised his arms, preparing to counter, but Yami wasn't aiming for his body.

He went for the ground instead.

Vaporizing Freezing!

Todoroki's footing crumbled, and in the next moment, he saw as all the ice he had created in the field shattered and turned to little fragments, like snow.

Yami took advantage of the opening, skating around Todoroki like a whirlwind as the last layer of ice began to break, building momentum before delivering a devastating uppercut straight to his ribs.

Todoroki flew backwards, but before he could fall off the stage, Yami grabbed him by the collar.

For the first time in the fight, he winced.

Yami grinned. "If you don't fight me properly, you'll lose. Is that what you want? To go out like a coward?"

Todoroki's breath hitched.

Then, slowly, his left hand moved.

Yami's grin widened. "There it is."

A sea of flames erupted around them, the heat so intense that the air itself shimmered. 

Yami barely had time to react before the blast sent him flying backwards. But before he could be thrown out of bounds, he used Open Ribs—his ribs shot downward, anchoring him into the ground. The force nearly ripped his torso apart, but he didn't let go.

Stabilizing himself, he quickly petrified his chest, his obsidian-like skin shielding him as the scorching heat of Todoroki's flames and the burning sunlight licked at his body. 

The flames roared, devouring the last of the frozen battlefield, melting away every trace of Yami's ice.

Then, Yami saw it—Todoroki's tears.

For a second, the fire flickered, his control wavering. Yami watched as Todoroki stood there, his right side steaming, his left side trembling. The frost that had covered half his body was gone, revealing his true strength. His father's power. His power.

Yami exhaled, his golden eyes locking onto Todoroki's wide, uncertain gaze.

"You finally get it, don't you?" Yami said, his voice steady despite the lingering heat. "You're not your father. You're not just the sum of two people." He pointed at Todoroki's chest, right over his heart. 

"The blood in your veins? It's not just his. It's hundreds. Thousands. Every ancestor before you. And this power—it's yours. Not his. Not anyone else's."

The stadium fell silent. Even the crowd, usually wild with cheers, had gone quiet. They hung onto every word, their breaths held as if the truth in Yami's speech was reaching them, too.

Todoroki clenched his fists, his breath uneven. His flames flickered, no longer out of control. He wasn't running from them anymore. He owned them. For the first time in his life, he wasn't afraid of his left side.

Then, Yami smirked. "Now tell me something, Ice Boy..." He smiled, his body still steaming. "You know what comes after one?"

Todoroki blinked, confused for a moment. But then, he saw it—Yami's skin turning red, steam rising in thick waves from his body.

The temperature dropped as Todoroki instinctively raised his left hand, "If you want to see me fight at my full power," Yami said, his voice steady, "then do me a favor—cover the stadium ceiling with ice."

Todoroki hesitated. "Why—"

Yami's smirk widened. "Just do it. You'll see why."

For the first time, Todoroki didn't question him. Maybe it was respect. Perhaps it was gratitude.

Lifting both arms, Todoroki unleashed a massive wave of ice, coating the stadium's ceiling in a frozen layer. The entire arena was suddenly cast in a cool shade.

Yami let out a breath. 'Finally, I can fight in the shade.'

He pulled at the collar of his U.A. jacket and tossed it aside. His black shirt followed, revealing his bulging muscles, thick veins pulsing as if his entire body had become a raging engine. His breath came out in hot bursts, his chest heaving.

His chest de-petrified, and at that moment, his body fully activated. He lowered into a stance, his golden eyes burning. Then, with a deep inhale, he roared:

"POWER UP TO THE VERY LIMIT!"

"FLAMDE MODE: GEAR! SECOND!"

The moment Yami activated Gear Second, the ground beneath him exploded. His speed shot through the roof, his body a blur of pure speed.

Todoroki barely had time to react before Yami was already in front of him, fist cocked back.

Yami's punch slammed into Todoroki's gut, sending him skidding across the battlefield. But instead of falling, Todoroki twisted his body, flames roaring to life as he used the momentum to counterattack.

A pillar of fire and ice clashed mid-air as Todoroki swung his arm. Yami barely dodged, twisting in the air as flames singed his skin. Steam shot from his body, cooling the burns instantly as he landed.

But Todoroki was already moving. No more hesitation. No more holding back. He was fighting at full power.

The two clashed again, fists colliding, ice and fire exploding around them.

The stadium trembled. The crowd roared. The pros in the stands leaned forward, their eyes sharp, their jaws tight. They weren't watching kids fight anymore...

It wasn't just a battle of quirks.

It was a battle of will.

Todoroki blasted forward, flames trailing behind him as he threw a right hook. Yami dodged, countering with a knee to his ribs. But Todoroki caught his leg, swinging him into the air before blasting him with a wall of ice.

The frozen cage shattered instantly as Yami burst through it, steam rolling off his skin. He landed on the ground with a heavy thud, wiping a bit of blood from his lip.

Todoroki was panting, his body swaying. He had never fought like this before.

And Yami?

He was still standing.

"You're good," Yami admitted, cracking his knuckles. "But you're not beating me."

Todoroki didn't answer. He couldn't. His body was giving out. He had finally used his flames, but he had never trained with them like this. He wasn't built for a long fight yet.

His breathing turned ragged. His legs shook. And then, finally—

His body collapsed.

The stadium fell into silence.

Midnight hesitated for a moment, waiting for any sign of movement from Todoroki. But there was none.

She raised her whip. "SHOTO TODOROKI IS UNABLE TO CONTINUE! THE WINNER IS YAMI IWATANI!"

The crowd erupted, but Yami barely reacted. He wiped some sweat from his forehead, looking down at Todoroki, who was breathing heavily, struggling to stay conscious.

The match was over. But there was one last thing Yami needed to say.

He crouched down, making sure no one else could hear.

Then, in a low voice, he whispered:

"I get you. I really do." He paused. "But unlike you…"

His golden eyes darkened, and his body's heat dissipated instantly.

"...I killed my father."

Todoroki's breath hitched, his tired eyes widening slightly.

And with that, Yami stood, turning away as Midnight officially declared him the winner.

He didn't look back.

As the crowd cheered, as the cameras zoomed in, and the pros whispered about what they had just witnessed—Yami just walked away.