WARNING

Due to the nature of the source material, there will not only be scenes of violence but also heavy scenes of a sexual nature. Viewer's discretion is advised.

The Kamen Taimanin: 2WEI

Prologue: Will 2K

Yukikaze Mizuki only wanted to find her mother, Shiranui Mizuki. She had gone missing five years ago, and she had not been heard from ever since. Only now, after all that time, Yukikaze and her team were finally able to get a lead to finding her again. Their lead took them to the corrupted city of Yomihara and the whorehouse Under Eden, which they infiltrated as sex slaves.

And so, Yukikaze was forced to degrade herself, wearing nothing but a tiny, white string bikini that barely covered her tits, or lack thereof, and white opera gloves. She sat on a bed, waiting in a large and opulent bedroom.

Yukikaze was tanned, with obvious tan lines from wearing her uniform. Her long brown hair, which was spread across the bed, was tied into twin ponytails with pink ribbons. She wore a look of anxiousness and misery as she fiddled with the blue necklace around her neck.

"Rinko-sempai... Tatsurou..." she murmured.

"Leave the room once you're finished preparing," a voice came from the other side of the door.

"Understood," Yukikaze sighed. And so she stood up, and walked through the next room over to accept her fate.

Leading her was an overweight, middle-aged man with greying hair and green eyes. His outfit consisted of a red robe with yellow trimming, a white shirt, red pants, and brown shoes. He opened the door to the next room, greeting the man waiting inside.

"Please excuse me. My apologies for keeping you waiting," he said to the man inside.

"Ah, no apologies necessary," the man said as he stood up. He was a large man in a blue suit that did nothing to hide his pot belly. He was also someone that Yukikaze instantly recognised.

"You...!" she gasped before her face twisted into a snarl. "Yazaki!"

"You look pretty pathetic right now, Yukikaze," Yazaki sneered. "It suits you."

Without thinking, Yukikaze lunged towards Yazaki, intent to kill him, but he quickly caught her by the throat before driving his knee into her stomach. She gasped in pain as she choked in his grasp.

"My, my, what an unsightly slave we have," he commented.

"Please forgive her, Yazaki-sama," the other man apologized. "I assure you, no more of that will be tolerated by her." He glared at Yukikaze. "Isn't that right?"

Yukikaze gritted her teeth, and opened her mouth to snap back, but Yazaki pushed more pressure on her throat to silence her.

"Now then, let's begin," Yazaki grinned lecherously as he trailed his finger over her abdomen. "To start, I think I will activate your seal to give you as much torture as I can without you falling apart." His finger slowly slipped into the thong, and all Yukikaze could do was close her eyes and brace for the carnal pain...

Suddenly, the lights went off.

"Hm?!" Yazaki blinked, looking around in shock. "What's going on? Real, what is the meaning of this?!"

"I-I don't know! I will check!" the other man - Real - hurried to the intercom, and pressed the button. The light blinked online. "What's going on!?"

"Real-sama! We have an intruder! A single invader!" the voice on the other end cried in panic.

"Hm?" Real frowned. "Is it the Taimanin? That Almighty Ninja?"

"No, it's nothing like her. The invader is using magic! They've already breached the gate and- *keeeesshhhhh*"

"What's wrong? Come in! Hey!" Real shouted. No response came. The lights slowly switched on to a deep crimson glow, showing that the backup power had kicked in. "It would seem that we have an uninvited guest. Unfortunately, I must ask that we put our planned activities on hold for now."

Yazaki's lips curled into a displeased frown. He had been looking forward to violating the girl in his clutches, but now he would have to wait. With an annoyed huff, he tossed Yukikaze unceremoniously on the floor, no longer in the mood.

"This had better be taken care of quickly. I paid good money to fuck this Taimanin, and I expect to get my money's worth."

Yukikaze coughed as she rubbed her throat, a sense of relief washing over her as she was spared having her body played with, for the moment at least. Part of her was humiliated over needing to be rescued like this, but she was in no position to complain.

The brothel's guards all charged in through the darkened hallway, all armed with assault rifles, only to stop as they heard the sudden sounds of violence not too far from their position. Screams, gunshots and explosions went off from the other side, only to suddenly stop.

Then they heard it - footsteps.

The guards levelled their guns down the dark hallway, their flashlights lighting the path. Unfortunately, their flashlights were not strong enough to give them a clear view. They did not even have night vision goggles.

And then, all of a sudden, something glowed like a white-hot flame, lighting up the entire hallway, revealing a singular figure before them - the intruder.

The intruder was clad in a black trench coat draped over a sleek black bodysuit with his hood casting a shadow over his face. His chestplate bore the eerie visage of a lizard, complete with large compound eyes that gleamed in the dim light. His gauntlets featured clawed fingertips with a row of sharp spikes lining his forearms. His helmet resembled a big, red jewel with metal frames in the front shaped like piercing eyes, crowned by a single horn jutting from the forehead while the lower half resembled a sculpted steel jaw with menacing, shark-like teeth. Completing his ominous presence, a white scarf of pure energy fluttered behind him, its radiant glow eerily illuminating the hallway.

"IT'S THE KAMEN RIDER! OPEN FIRE!" one of the guards yelled.

The guards fired their guns at the Kamen Rider who held his right hand out in front of him, conjuring a magic circle that acted as a shield. As he strode forward, the bullets bouncing off his shield, he threw out his free hand to send a blast of wind that flung the guards to the floor, sending them sprawling.

As they struggled to pick themselves up, he dropped his shield and charged forward. Reaching a guard, he delivered an uppercut that flung him to the ceiling before letting gravity knock him out as he fell. He struck another guard in the chest with his open palm, knocking the wind out of him and throwing him into two of his fellow guards, knocking them down like bowling pins.

*Click!*

A guard got up behind him and aimed at his head, but the Kamen Rider conjured a magic circle behind him, and threw his fist into it. At the same time, an identical magic circle appeared next to the guard's head, and the Rider's fist shot out, knocking him out.

One guard remained, and he fired at the Rider only for his bullets to bounce off his armor until he ran out of ammo. He frantically went to reload, but the Kamen Rider used telekinesis to pull the clip out of his hand and crush it, letting the bullets fall to the floor. He then grabbed the last guard by his collar and slammed his head against the wall, knocking him out cold.

Leaving the unconscious guards, the Kamen Rider continued onward. He had learned of this place and did not approve of it, not one bit. Oh, he was fine with brothels, but only when the girls were willing employees and were treated fairly. This place, however, kidnapped girls and made them into sex slaves, exploiting them and profiting from their misery as they were raped night after night. It sickened him. A lot.

"Let's burn this place to the fucking ground," the Kamen Rider growled, driving his fist through the door and, with a savage pull, ripped it off its hinges.

Real sat in his office, eyes locked on the screen as chaos unfolded before him. His fingers twitched, his nails digging into his palms as he struggled to contain the situation. But it was futile — the intruder was far too powerful for his men to handle. Whoever this attacker was, he possessed abilities far beyond anything Real had prepared for.

"Someone stop him!" Real shouted into his intercom, but received no answer from any of the guards. "Shit!"

Meanwhile, Yazaki had barricaded the door with the room's furniture. He had paid good money to fuck Yukikaze, and he would not let anything stop him. Besides, Real promised him that he would take care of anything. And if the Taimanin couldn't stop them, who could? Even the police wouldn't try since they had many of them in their pockets.

He climbed on top of the bed, holding Yukikaze down. He licked her neck as she grimaced in disgust.

"Who gives a damn about some intruder? It's time to make a woman out of you," he growled, grinning as he tore off her thong. "What a yummy little pussy you've got." Not wasting any time with foreplay, Yazaki lined his big fat cock at the entrance of her pussy. Yukikaze braced for penetration, her hands clutching the sheets as she clenched her eyes shut.

However, she would not be the one penetrated here.

Suddenly, Yazaki froze as a blade pierced right out of his skull, spilling blood all over Yukikaze. It happened so fast that he still wore a terrible expression of shock all over his face, eyes wide and mouth agape, with a blade sticking out right between his eyes. As soon as the blade was withdrawn, his body collapsed right on top of her.

Yukikaze nearly panicked as the weight of the corpse pressed down on her before she pushed him off and onto the floor. Spotting her saviour, she saw a young man her age flicking blood from his katana. He wore dark blue shinobi garb, secured by a black sash adorned with orange accents. A layer of mesh covered his arms and chest while steel gauntlets and greaves reinforced his limbs. An orange scarf wrapped around his neck, fluttering slightly with his movements. His short blue hair framed his face, and his piercing purple eyes gleamed with intensity.

"Yukikaze, are you-" he began before noticing her state of undress. His face slowly turned bright red at the sight of her nude body. Remembering her situation, she ripped one of her shoes from her foot.

"Quit staring, you perv!" she shouted as she threw her shoe at him. Tatsurou held his arm over his head as the shoe bounced over his gauntlet.

"S-sorry!" he squealed helplessly as he looked away.

She sighed as she calmed herself down, a blush forming on her cheeks.

"But... Thanks for coming for me," she added. "I'm really glad you came. What's happening right now? Was the mission cancelled?"

"I did call Asagi-sensei and Sakura-sensei, but they won't be here for another five minutes," Tatsurou said, averting his gaze, but he was still sneaking in a few peeks. "I ran into him instead."

"Him?" Yukikaze blinked, standing up from the bed.

"The Kamen Rider," Tatsurou clarified.

"Him?"

"That's what I said. He's destroying the brothel right now. But I'm worried about my sister. Do you know where she is?" Tatsurou asked.

"She's probably being kept underground with all the other girls," Yukikaze guessed as she clenched her fist. "Come on, let's go."

"Um, m-maybe you should get dressed first," he stuttered, handing her Taimanin suit to her.

"Oh, yeah," Yukikaze blushed as she looked down at herself. "And I need my guns, too."

The Kamen Rider threw a guard into the bar, sending wine glasses and bottles falling off the shelf, shattering them. More and more guards came to stop him, but he swiftly knocked them out.

The patrons had all fled in their panic, pulling up their pants as they ran. The girls took cover, huddling together in fear during the Rider's rampage.

One guard tried to crawl away, his leg broken by the Rider, but he grabbed him by the back of his blazer and hauled him up to face him.

"Where's your boss?" the Rider demanded, growling. As the guard whimpered, the Rider sniffed the air before glaring at him in disgust. "...Did you seriously wet yourself?"

Elsewhere, both Tatsurou and Yukikaze - the female Taimanin back in her uniform, were nothing but a motion of blurs. She wore a sleek black leotard adorned with silver accents, paired with black gauntlets lined with tufts of fur. An orange skirt draped around her waist, adding a striking contrast to her outfit. Her black, armoured boots, reinforced for battle, featured matching fur tufts around her ankles, completing her fierce and elegant appearance.

Instead of using the stairs, they dropped down to the deepest level of the brothel. As soon as they landed, Yukikaze drew out a pair of akimbo guns and pulled the triggers, shooting a large blast of green lightning to blow the doors wide open. Once they dashed inside, the women all screamed and panicked as the men jumped off of them and went running.

They found Rinko lying naked in one of the beds. Her clients had really gone to town on her as she lay there, panting, her naked breasts rising and falling with each breath. She had cum on her chest, face and leaking out of her worn-out pussy. Her long blue hair was sprawled out all over the bed, unkempt and sticky.

"Nee-san..." Tatsurou whispered, mortified at what they had done to his sister. His eyes narrowed in anger, wanting to find the men who did this and make them pay.

"We're too late," Yukikaze grimaced, clenching her teeth. "Those sons of bitches are long gone by now, so there's no point looking for them. Let's just get her out of here. Find something to cover her up."

Tatsurou nodded, his shoulders still trembling, as he carefully took Rinko into his arms.

Real frantically stuffed wads of cash into his bags, his hands trembling as he scrambled to gather every last bill. He had to get out before that masked freak caught up to him, or worse, the Taimanin raided the brothel.

He bolted for the door, but the moment he stepped out, he froze like a deer caught in the headlights of an oncoming car.

At the far end of the hallway, the Kamen Rider stood motionless, his imposing figure framed by the dim light. Scattered at his feet lay a dozen unconscious guards, their bodies motionless.

"Going somewhere, Mr. Pimp?" the Kamen Rider asked, flexing his clawed fingers menacingly.

Real's face twisted in anger.

"So, you're that Kamen Rider everyone's been talking about. Do you have any idea what you've just done? Do you even know who you're screwing with?"

The Kamen Rider remained unfazed.

"I just destroyed a den of debauchery," he stated flatly. "I don't have a problem with the sex industry, but sex trafficking and slavery? That's where I draw the line."

Real let out a nervous chuckle, masking his fear with feigned innocence.

"Sex trafficking? I have no idea what you're talking about. I'm just a businessman, providing a service: a place for people to relax and blow off some steam."

The Kamen Rider's eyes gleamed with cold fury.

"Don't play dumb. I doubt the girls you 'employ' are here by choice."

Real growled as he dropped his bags before he reached into his coat, pulling out a black capsule. With a sharp click, he activated it and pressed the device against his chest, his body greedily absorbing its contents.

[TYRANT!]

A twisted grin spread across Real's face.

"Whatever you say, brat. Business is business, and you're ruining mine!" he bellowed as his body convulsed, bulging and twisting into something monstrous.

His head elongated into a reptilian snout, flanked by massive, elephant-like ears. A sharp horn jutted from his snout while a mohawk of spikes ran down the back of his skull. Spikes bristled along his arms, which warped into deadly weapons: his left hand morphed into a spiked iron ball while his right transformed into a curved, sickle blade. His abdomen had strange hexagonal markings. His legs, now covered in thick, scaly armour, ended in razor-sharp talons that scraped against the floor with a screech. Then, with a sickening crack, a long, segmented tail burst from the base of his spine. It wriggled and coiled behind him, its centipede-like structure lined with jagged, venomous barbs. The tail twitched with unsettling precision, each segment writhing like a living weapon, poised to strike.

The air around him grew heavy with malice as his monstrous form loomed over the Kamen Rider.

Despot Kaijujin Tyrant

The Rider summoned a magic circle, its intricate symbols glowing with arcane power before unleashing a roaring stream of fire at Tyrant. The red-hot flames surged forward, meant to sear through the monstrous foe.

But the attack had no effect on the monster.

With a guttural growl, Tyrant's stomach split open, revealing a gaping cavity at its centre. The swirling void within hungrily sucked in the flames, consuming them in an instant.

His eyes flared with malicious glee as the cavity pulsed, then erupted, launching the stolen fire straight back at the Rider.

Reacting in the blink of an eye, the Rider slammed his hand to the ground, summoning a stone wall that rose from the earth with a thunderous crack! The inferno crashed against the barrier, heat licking at its surface, but the Rider remained unharmed behind his summoned shield.

"He can absorb my magic," the Rider frowned. OK, this might be tricky.

Suddenly, a thunderous crash shattered the air as Tyrant's spiked ball smashed through the stone wall, reducing it to rubble. Dust and debris barely had time to settle before the Kaijujin retracted the weapon with a metallic clank and lunged forward, closing the gap in an instant.

The Rider barely had time to regain his footing before Tyrant's sickle blade came slashing toward him. He leapt back, narrowly avoiding the razor-sharp edge — only to realize too late that the attack wasn't over.

With a wicked snap, the sickle blade shot forward, propelled by a chain connected to Tyrant's wrist. It wrapped tightly around the Rider's leg, locking him in place. But before he could react, Tyrant yanked hard, sending the Rider crashing to the ground with a bone-jarring thud.

Then, with brutal efficiency, Tyrant swung his arm, sending the Rider flying.

The Rider's body slammed into the ceiling, then the walls, and then the floor in rapid succession, the sheer force of each impact rattling his senses. The chain finally retracted, dragging him back toward the monstrous Kaijujin like a caught prey.

But before he could recover, Tyrant raised his foot and brought it down, crushing the Rider's chest beneath its weight. The Rider let out a sharp grunt of pain, his body pinned beneath the beast's overwhelming strength.

"Ugh!" the Rider grunted as Tyrant's foot slammed down on him again and again, each crushing impact forcing the air out of his lungs.

Just as Tyrant raised his foot for another devastating stomp, the Rider's hands shot up, catching it in a powerful grip. With a defiant roar, he threw the massive Kaijujin off balance, sending the beast crashing onto its back with a thunderous impact.

Wasting no time, the Rider wrenched the chain off his leg with a sharp pull, the metal links snapping apart as he pushed himself back to his feet.

Tyrant snarled, glancing down at his severed sickle blade, only for a fresh, gleaming one to grow back in its place. A pleased growl rumbled from his throat as he rose once more, his monstrous grin widening.

Without warning, Tyrant's mouth gaped open, and a fireball erupted forth, roaring toward the Rider like a blazing inferno.

*BOOM!*

The Rider's chest exploded in a violent burst of heat and force, his scream echoing as he was blasted off his feet and sent crashing into the ground. Smoke rose from his scorched armour as pain wracked his body, the overwhelming heat still searing through him.

"Are you alright?" a voice crackled through his helmet.

"I'm fine, Sheila! Just help me out here, please!" the Rider groaned, pushing himself up despite the lingering pain.

"Beginning analysis… Analysis complete. This Kaijujin possesses the ability to absorb your energy attacks."

He let out a frustrated sigh.

"Tell me something I don't know, please."

"Recommendation: switch to a high-speed, physical combat mode."

A smirk tugged at the Rider's lips as he steadied himself.

"Gotcha!"

Tyrant unleashed another torrent of flames, the searing inferno rushing toward the Rider. Reacting instantly, he raised another stone shield, the earthen barrier solidifying just in time to absorb the fiery blast.

Behind its cover, the Rider seized the opportunity. His hands moved swiftly, closing the front panels of his Driver and swapping out the capsules, preparing for his next move.

"Let's go!" the Rider declared, activating both capsules.

In a flash of energy, the projections of two figures materialized beside him, standing tall and resolute.

The warrior on the right was clad in armour modelled after a rhinoceros beetle. His upper torso gleamed with red armour, a bold black 'S' emblazoned at its centre. A sleek black bodysuit covered the rest of his form, complemented by pristine white gloves and boots. His helmet featured large, green compound eyes, and a single curved horn jutting from the space between them. A white scarf billowed behind him, adding to his commanding presence.

The warrior on the left bore similar beetle-inspired armour, but his design was more streamlined and modern. His black bodysuit was reinforced with slim silver plating along his limbs while his chest was encased in red armor resembling a beetle's wing shell. His helmet sported a striking red horn bisecting a large blue visor, giving the illusion of twin compound eyes. Around his waist, a high-tech belt housed a small, robotic kabuto beetle, its red shell glinting under the light.

With his transformation prepared, the Rider slammed the capsules into his Fusion Driver, tapping them once they were secured.

[KAMEN RIDER STRONGER! KAMEN RIDER KABUTO!]

The projections surged toward him, their energy fusing into his body.

[FUSION RIDE! KAMEN RIDER ZWEI: LIGHTNING SPEED!]

At that moment, Tyrant smashed through the stone wall, sending debris flying in all directions. As the dust settled, the Kaijujin's glowing eyes locked onto the figure standing before him.

The Rider had changed, standing clad in a sleek black bodysuit. Its surface was streaked with glowing lines that coursed down his sleeves and legs like bolts of electricity. His torso was protected by bold red armour with a black lightning bolt slashing across his chest in the shape of the letter 'Z'. His forearms were encased in white gauntlets while his legs were reinforced with matching boots.

His helmet gleamed under the dim light, crowned by a long rhino beetle horn-shaped crest that bisected his large green eyes. From his neck billowed a scarf woven from pure lightning, crackling with raw energy as it danced in the air.

With a commanding stance, the Rider pointed to the ceiling while keeping his gaze fixed on Tyrant.

"The Heavens call me…Kamen Rider Zwei! I will defeat all evil at Lightning Speed!"

Tyrant roared and charged, lowering his massive horn to gore Zwei. But in a crackling blur of static electricity, the Rider vanished from his path. Sparks flickered along the walls as Zwei ran along the vertical surface, effortlessly manoeuvring behind his monstrous opponent.

But before Tyrant could react, a barrage of lightning-fast kicks struck his back, each blow landing with pinpoint accuracy. The Kaijujin howled in pain, staggering forward from the relentless assault. Snarling, he whipped around, swinging his sickle blade in a deadly arc, aiming to take Zwei's head clean off.

Zwei leaned back, narrowly dodging the strike, then snapped forward, his fists becoming a blur as he unleashed a rapid-fire chain of punches into Tyrant's chest. The Kaijujin reeled, stumbling backwards from the relentless blows.

Tyrant's eyes flashed as he prepared to unleash another fiery onslaught. But Zwei was faster as he summoned his weapon.

[MULTIARMS!]

A rod with spheres on both ends appeared in his hand before changing shape, becoming a hi-tech hand axe with electricity crackling from the edge.

[LIGHTNING AXE!]

With a swift, precise chop to the throat, he cut off the attack mid-breath. Tyrant gagged, his flames dying in his maw, before it let out a scream from the electrical shock.

Seizing the moment, Zwei spun and delivered two brutal roundhouse kicks, the impact snapping Tyrant's head to the side and sending him stumbling back.

Zwei landed smoothly, standing firm as he raised his hands to his belt, tapping both Rider Capsules to activate his finishing move.

[STRONGER! KABUTO! FUSION BURST!]

Electricity crackled wildly around his body as he stepped forward, his voice cold and resolute...

"Let me make one thing clear," he declared, power surging through him. "Anyone who'd use women as mindless sex toys..."

The world seemed to freeze, everything except for Zwei.

Tyrant stood locked in place, his body frozen in time as Zwei strode forward, each step surging with raw power. Lightning danced along his frame with electrified echo trails following him, lightning coiling around his right leg, amplifying the devastating force gathering within it.

Then, with a final step, he twisted his body, eyes blazing with fury.

"...IS LOWER THAN SCUM! RIDER ELECTRO KICK!"

His leg swung in a blinding arc, connecting squarely with Tyrant's skull. Sparks erupted on impact, and as Zwei turned his back to the monster, time resumed.

Behind him, Tyrant exploded in a thunderous burst of energy and flame.

Real collapsed, gasping, as the Monster Capsule ejected from his body and shattered into pieces. He groaned in defeat, left lying on the ground.

From the Monster Capsule's remains, energy began rising, slowly being dispersed. Zwei took out a capsule from his holder and held it out to the energy, clicking on it. Like a vacuum, it sucked up the stray energy particles. Briefly, the capsule glowed before it dimmed.

Zwei exhaled, about to leave, when he noticed Yukikaze and Tatsurou staring at him. Tatsurou held Rinko, wrapped in a protective cloak, his grip tight as he watched the Rider in stunned silence.

Zwei simply raised two fingers in a casual salute, his expression hidden behind the helmet. And then, in a flash of crackling energy, he took off at lightning speed, streaking through the night, leaving only a trail of electricity in his wake.

"...Kamen Rider," Yukikaze exhaled.

The Taimanin, warriors tasked with defending the world from the dark forces that threaten it, face a new breed of evil which they are unfamiliar with. But with new challenges comes a new ally, and his name is Kamen Rider Zwei!