Toa Solaric: I don't own either Kamen Rider or Nier: Automata as I'm writing this for fun! I welcomed you guys to my newest story!

Kamen Rider Nexus: Ruined World

Ch1: Awakened In Dying World

We now see what looks like a ruined city come into view with explosions everywhere. There number of dead bodies but there many people, wearing different types of suit and armor fighting against monsters.

This is the final war of Kamen Riders who have protected humanity from Kaiju from the Showa and Heisei era… as humans is dying out from a terrible plague that impacts the entire world.

"This is end here with you, monster!" A magenta-colored with magenta color eyes spoked angrily.

"Not bad, Decade… I didn't think that you would push me this far…" A mysterious black armored figure with dark blue bug eyes spoked in a chilling tone. "But know this, it will be a hollow victory for you, Kamen Riders! Human going down into extinction by the plague and you cannot change anything about it!"

"Even if that is true, the legacy of Kamen Riders will still be carried onward!" Decade responds before placing a card into his Decadriver.

The same goes for the black armored figure who inserted a card into his device.

FINAL ATTACK RIDE: DE-DE-DECADE!

The two armored beings jumped into the air and released powerful kicks at each other as a powerful shockwave spread across the air. This affected the Riders and the monsters that were fighting in response as the entire city caught in bright light.

With this battle, it marked the end of Kamen Riders and their terrified foes as humanity fall into completely extinction on earth. Or so, it was believed…


The first thing that a young man with black hair does was gasping for air after being awakened in what looks like an odd capsule. It wasn't long until the gasp for air because a cough was as violently as if he was starved for oxygen for so long that he had time to adjust to breathing it again.

I'm in what looks like a glass case…? But why? The young man thought as he managed to focus more and stared at the glass in front of him.

He was about to touch the glass but the glass soon vanished into thin air. The young man thought it was strange before tried to push himself up to get up. But it was before he realized it a mistake as his body was incredibly sore and it difficult to move.

The young man decided to try again, but slower, getting himself out of the capsule and seeing the outside of the place for the first time.

It looked like some underground lab, but with dark, freezing, damp, and dreadful feeling around it. Not many of the lights above were not functioning, the remaining ones that still emitted light was dim and constantly sputtering on their last legs. There was a chalkboard nearby with what looks like calculation, but he cannot seem to read it. What in the world is this place?

"Where… am …I?" the young man hoarsely pushed out through chattering teeth. It not surprised as his mouth was dry as a desert and his voice sounded like he hadn't used it for a long time.

He soon saw a mirror nearby looks and approached it carefully to get a better look at himself. In the mirror was a young man around the age of 18 with short, black hair and honey-gold eyes. His skin color is mostly tanned with Asian features. He wore a red shirt, blue jeans, and brown shoes.

Suddenly the young man heard a hissing sound and turned around to see another capsule not far from where he was. Feeling relieved at the prospect of explanation, he gently stumbled over the frosted floor to the open capsule for a closer inspection. As he approached the capsule, he stopped immediately.

What the…

A young girl around the age of 14 with light, brown hair that tied in a ponytail. She wears what looks like a school uniform which black shirt with white collars and red tie, black pants, and combat boots.

Suddenly memories of the girl spark into the young man and his eyes widen in shock.

"Lora!" the young man screamed in shock. Even though his memories were still haze after what happens, but he recognized his younger sister.

It wasn't long until the girl herself starting to wake up and stares back at him with the same color honey gold eyes.

"I-Isamu-nii… is that… you?" The brown hair girl with honey gold eyes asked hoarsely.

Though Isamu felt relief that she is alright, this filled him more with questions about this strange predicament that he and his sister are in right now. They were the only ones in this underground place. Why only them?

"Yeah, it is me," Isamu assured softly.

"W-Where… are we…?" Lora questioned, confused.

"I have no idea. But it seems that we're the only ones here in this place." Isamu answered honestly. "Can you walk?" he asked.

Lora struggled at first to get up after awakened from the capsule-like him, but she soon managed to barely stand up from the ground and holding onto his right arm tightly.

"It's so cold here…" She said.

"Yeah, let's tried to find somewhere warmer and see if we can figure out what happened," Isamu said as the siblings soon leave the chilling room behind as they made their way through an empty and dark hallway.


It wasn't long until they make their way into another room which resembled a lab with multiple large computers.

"It doesn't seem that anyone is around…" Isamu remarked. The place seems to be very old due to the dusty upon this place is untouched by anyone else.

"Do you think we might find something on the computers?" Lora asked stares at the computers.

Isamu tried to press the keyboards to see if anything work, but nothing seems to be working. The young man let out a sigh and stares at the place.

"It's no used. This place must be really old…" Isamu soon noticed something from far from the computer. "Huh?"

"Isamu-nii?" Lora turned around and looks at the same direction that her brother did.

On what looks like steel like a table with wires was an unusual object. It was a hand-held device with a halo ring on the top with bird-like wing attachments on the bottom. But what was unusual was that it is covered in stone.

"What in the world is this?" Isamu asked as he approached the table. He soon picked up the strange object and got a better look until something unexpected occurs.

The halo ring of the object glow with a green light that struck both Isamu and Lora at the same time, though it wasn't painful but went through them like nothing.

However, they end up received strange visions in their mind.

Armored warriors fight against monsters in a desolated city before a bright light covered the entire city.

Not far from above the city was two warriors clashed in bladed combats, but their appearance is covered by white and black energy.

Soon the stone-like object in his hand becomes white and the wing parts turned blue. Also, there is a red crystalized v mark on the center of the device.

"Isamu-nii, what just happens?" Lora inquired as she making certain that everything is alright.

Isamu wasn't sure how to respond especially when it comes to those visions that appeared in his mind.

"I had no idea either…" Isamu looking at the strange object in his hand.

"So, you two have awakened at last…" A female voice, that sound almost cold and emotionless from out of nowhere spoke up.

"Who is there?" Isamu questioned as he makes his way back to Lora's side.

Suddenly they saw small particles of lights come out of the computers that were around the room before they gathered in one area of the room. Isamu and Lora soon saw someone emerged out of the light despite using their arms to cover their eyes from the light.

From what they could grasp, they are seeing a young woman with long dark brown hair and matching brown eyes. She dressed in a one-piece dark maroon dress that has light brown long sleeves.

"I ask…" the young woman looks straight at Isamu especially the Nexus Ring in his hand. Isamu won't deny that he is attracted to her charm. "Are you my Master?"

"Master?" Isamu simply stared at the young woman's face and focused on her focused gaze on him. "We have no idea of what's going on here, or why we were here in the first place."

"My name is Shuka, I was created to assist you upon your awakened." Shuka introduced herself with a bow. "You two are the last remaining of humanity survived from the white chlorination syndrome."

This caught both their attention as their eyes widen in shock to her words. They are the last of humanity? "White …chlorination syndrome? Last of humanity? What are you talking about?" Lora asked, confused.

"A disease that turned your entire body into sodium chloride. Unlike the rest of humanity, you two held onto to the gruesome end before you two were found and kept away from the military who tried to experiment on you two. With humanity being on brink of extinct, you two were placed in cryosleep chambers in this lab that lies hidden deep underground. Yet you two seem to awake due to malfunction with the chambers and awakened further away from the appointed time." Shuka explains.

"Do you know what's going on outside?" Lora questioned.

"Unfortunately, I don't have any bits of knowledge as I was awakened when your brother picked up the Nexus Ring, and most of the systems like security had been damaged severe," Shuka answered.

This made Isamu rubbing his nose in annoyance. "Even so we are still being locked away against our own will. But why can't we remember anything besides ourselves?" Isamu asked, confused about why he felt that there are gaps in his memories.

"The reason why you two might not remember much about it because you were sleeping for a long time." Shuka hypothesized. "But first, I need to know if there aren't any defects after waking up." She requested as she approached them and looking at them carefully.

"Well, we are quite thirsty…" Isamu replied. Lora nodded.

"Let me take care of that," Shuka answered before flickering her fingers.

It wasn't long until the floor beneath them open before water pouch were lifted out of their components. Isamu and Lora took the water pouch before noticing that they are very cold.

"These are special water pouch that has been developed to convert water into freshwater. You are supposed to keep yourself hydrated as possible." Shuka explains.

Isamu looks at the water pouch before taking the first sip and his eyes widen in surprise. "Wow… this is refreshing." He said to his sister who nodded after drinking the water.

"The next thing we need to discuss is the Nexus Ring that belonged to you now, Master." Shuka spoked, stares at the object in the hand of young man.

"What exactly is the Nexus Ring?" Asked Isamu, as he and Lora looking at the strange device.

"Nexus Ring awakened to the one who they are waiting for and grant them incredible power," Shuka answered.

This made Isamu looks surprised. "Power? What for?"

"To protect the last of the humanity of this world and ensure you'll be to leave this world to another safety," Shuka answered. "but the Nexus Ring alone can't get you two out of here."

"What do you mean we can't get off of this world?" Lora inquired.

Shuka soon takes out a small silver case and takes out a card. "To utilized Nexus's full power, you will need to obtains Rider Cards." She said, holding one in her hand.

The card Shuka held in her hand has a picture depict of being with red armor, red shoulder guards, red anklets, and black tights. There is a silver belt around the being's waist with multiple buttons on it, and a red gem in the center. The head of the individual had red compound eyes, silver mouthpieces, and a yellow horn. There is also a name at the bottom.

KAMEN RIDER KUUGA

"Kamen Rider… Kuuga?" Isamu replied, confused at the name.

"Kamen Riders are humanity's last hope against greater danger until they were gone from this world as well. The Rider Cards are a manifestation of their remaining power, they are scattered across the outside world and remain hidden until the one finds them." Shuka explains.

"How are we supposed to find them?" Lora asked incredulously.

"I can track certainly energy signatures especially those of the Kamen Riders," Shuka answered before given the Kamen Rider Kuuga Card and the case to Isamu.

Isamu opens the case and finds two cards with a picture of two different Kamen Riders. The first one is a silver grasshopper helmet with red eyes, wears a black jumpsuit with green chest armor, silver gloves and a silver belt with a turbine, and a red scarf. The other Rider has a helmet resembled a beetle with green eyes, dressed bulkier red and black suit with an 'S' symbol on the center and a white belt with an image of a red sun.

"Isamu-nii…" He turned to looks at Lora who shown concerned expression.

"I may not like the idea of being forced into this either, Lora." He answered softly before placing Kuuga's card back into the case. "If Shuka is right about us being the last humans, we need to find a way off this world and find another place to live in."

"But where will we go?" Lora asked, confused.

"Maybe a world close to ours, but more peaceful and disease-apocalypse free," Isamu answered. "It may not be perfect, but as long as we're together, it will be fine."

Lora looks surprised and awes at him.

It wasn't long until they felt a huge tremor and the ground beneath them began to shake before them.

"What in the world is going on?" Lora asked, in fear.

"This place is no longer safe anymore! Master, you and your sister must follow me!" Shuka stated with a serious expression.

"Right! Let's get out of here!" He and Lora soon followed Shuka throughout the hallway before they spotted the exit that would finally lead them to the outside.

"We need to make it!" Isamu said, grabbing Lora's wrist and keep on running for the exit.

They soon got out of the cavern before the boulders and debris being able to come down upon them at the last moment.


Isamu and Lora are currently catch breathe heavily after narrowing escape from their possible death and they ended up in the forest instead.

"Man… that was close," Isamu said in relief as he and Lora patting off the dust from their clothes.

They turned around to see what was left of the cave they came from.

"Shuka, I'm sorry about what happen to the lab," Isamu said to the woman who stares at them.

Shuka didn't seem to show any expression that indicated her being troubled by the fact that the lab was destroyed by an earthquake. "It's fine, Master. That lab already served its purpose after holding on for a very long time." She assured. "For now, we should get a better bearing of our new environment and located necessities for our survival."

"True… but it still hard to believed that this is what the world looks like after the rest of the human race extinct," Isamu commented after looking around their surroundings at the large forest that they are currently in right now.

"Yeah… It still hard to believed we are the only ones." Lora lamented.

"There is no turning back for us now. The only we can do until we get out of this world, Lora." Isamu answered as the expression on his sister's face hadn't changed.

"If you say so…" she replied before she, Shuka, and her brother starting to move out right now.


In an unknown cave, a black hooded figure was looking around the area until they find what they were looking for. Then the black hooded figure got out something looks like the Nexus Ring, but the halo ring is pitch black and the wings were red as blood.

Soon the halo ring glows with dark energy and the black hooded figure fired at the ground in front of them. It wasn't long until something emerged out of the ground and let out a roar of angry into the air as a figure let out a furious cried. The being has a black suit on with golden armor reminiscent of the letter A in the center of his chest and was flanked by silver shoulder armor. On wrists were metal wrists guards, while the black shin guards were on the feet. The head is a helmet in the shape of the letter A and had a red crystal in the middle.

The black-hooded figure watches as the armored being running through the forest until it vanished from their sight.

"Let see… how you would do things against Glaive, Nexus." The black-hooded figure spoke before leaving the area and vanished completely.


Shuka is currently watching the siblings eating berries and mushrooms that she determined are editable over a makeshift campfire. Even though the world has become much different after they slept, there are still things that she can identify to guide the last of humanity to ensure their survival.

"Shuka, aren't you going to eat any of it?" Asked Isamu, noticing her not touching the foods. Even Lora is curious about why she isn't eating as well.

"It's fine, Master. I'm not human like you two nor I need nurturement. You two needed it more after being put into sleep for a long time." Shuka answered.

"C-Could you stop calling me Master, Isamu is fine." The young man answered, feeling uncomfortable with being called that. "Even if it's your job, I still would like us to treated each other as equal."

"If you insist, Isamu," Shuka answered.

"And call me Lora," Lora added.

"Isamu. Lora." Shuka replied. "You two barely remember much of your past, but you two would still need to learn how to survive—" Before she suddenly stopped immediately and turned around.

"What's wrong?"

They soon hear strange noises not far from where they are as if someone coming their way. Or rather, a group of individuals approaching them.

"Could there be other survivors in this world?" Asked Lora, surprised. This made Isamu raising an eyebrow at the logical of more people beside them survived in this apocalypse world.

"No. That's impossible." Shuka responded, showing a cold exterior. "Whoever, those footsteps are too heavy for humans."

It wasn't long until they saw what coming out of the woods before looking surprised.

"Robots…?" Isamu whispered, blinking for a moment as he tried to make sense of what happened before them.

Indeed, those who ventured out of the forest are robots. These machines were made of some rusty orange/brown metal, having a pair of red eyes that glowed strongly. All of them are mostly big and small.

"Hu-man…?" One of them asked, looking at them.

"I don't like look in those eyes…" Isamu spoke. His sister happens to feel the same feeling like him.

"Human! Human! Human!" The group of machines exclaimed before charging at them and able to attack them.

"What!?" The siblings exclaimed in shock.

Before the machines could even launch their attacks on them, Shuka raised her hand and send the robots away from them with psychic like energy.

And they collided with each other before they blew up in the process as metal pieces are scattered around the place. Though there are remains tried to get to them, but Shuka grabbed hold of them with her psychic power before making them self-destruct.

"Shuka…" Both siblings can't help but look surprised at what their companion just saved their life from the murderous machines. Shuka turns and looks at them.

"Don't worry. I must make certain you two will survive." Shuka respond.

Isamu looks at the scrappers of the machine with a confused expression. "Why did they attack us for?" he asked.

"It hard to say, but they must be a program to target living things," Shuka spoke. "For now, we should get out of here before we get to attack again by more of them."

"R-Right..." Lora replied, trying to gather all the berries that they hadn't eaten yet.

The three tried to leave the area until someone else stopped them in their track.

But it wasn't until they were stopped once again by another pursue in the form of Glaive who approached them.

"Impossible…" Shuka whispered, with a rare disbelief expression upon her face.

"Is that another machine?" Isamu wondered confused at how this being looks completely different from other robots who tried to kill them.

"RAAAH!" Glaive shouts before coming charging at them with an advanced, high-tech looking sword in hand.

Shuka activated her power and created a shield to repel his attack which sends him flying backward. This made Glaive hit hard against the nearby tree and land on the floor.

"Did you defeat it?" Asked Lora.

Glaive soon showing hand movements and getting back up from the ground, but the armored entity glowing with purple light.

"No, this is something that can't be defeated by my ability alone…" Shuka then looking at Isamu. "The one who can defeat him is you. You need to transform." She answered.

"Shuka…" Isamu looks surprised at her.

Glaive tried to kill them once again but Shuka used her power to repel against his attack and send the armored individual back.

"I'm sorry about forcing you into this situation much earlier than I anticipated. If not, you and your sister need to run, I will do my best to hold it off even at the expansion of my life," Shuka answered with no fear in her eyes.

Isamu looks at her and then at his sister before looking at Glaive who was coming toward them again. He soon takes a deep breath before gets the Nexus Ring from his pocket.

"Even if we run and leave you here, where are we supposed to go?" Isamu wondered. After what he saw with those robots, there are might be more of them out there and would try to kill them. "I might not want this, but I won't allow someone else to risk their lives just to ensure our survival. Shuka, we still need your help in order to survive." Isamu said before pressed on the Nexus Ring before the entire area glow in intense white light.

The white light forced those in presence to covered their eyes from being blind.

"Kuuga-san!" Isamu shouts before placing the Rider Card into the Nexus Ring.

KAMEN RIDER KUUGA!

Appearing on his right is none other than the red armored warrior known as Kamen Rider Kuuga.

"Ichigo-san!" Isamu soon placed the next Rider Card into the Nexus Ring.

KAMEN RIDER ICHIGO!

On his left side was none other than was the grasshopper theme warrior known as Kamen Rider Ichigo.

"Please lend us your strength…" Isamu said before raising the hand with Nexus Ring into the air with Kuuga and Ichigo at the same time. "Henshin!" he shouts.

NEXUS FUSION!

Soon Isamu is glowing in silver-white color with Kuuga glowing red and Ichigo glowing light green before they merged with Isamu.

NEXUS: ANCIENT LEGEND!

The bright light faded to reveal a new armored figure in the presence. He dressed in what looks like a black bodysuit with white lines running along the sides. His chest has red and green chest armor that resembled muscle with a blue crystal glowing in the middle of the chest. On his shoulder are red shoulder guards with silver lines on the bottom. There is a black and green gauntlet attached to his hands. Attaching to his waist was an unusual silver belt that had multiple buttons on the side, but the center resembled a wheel. There is also something resembled a silver booklet device that attached to his right side. There are gold anklets around his legs and attached to his feet are silver boots. His helmet is green on the upper part and black on the bottom part, with large red compound eyes, a silver mouthpiece, and two golden horns with a blue crystal attach to his forehead. Then a glowing red v mark appeared on the center of his chest armor.

This is Kamen Rider Nexus Ancient Legend Form!

(Play Believe in Nexus- Masaaki Endoh)

Lora gasps in surprise to see her brother's transformation. "T-That's Isamu-nii?!" she exclaimed with a surprised expression.

"Yes, this is Kamen Rider Nexus," Shuka confirmed after seeing his transformation.

The new Rider looks at himself briefly before he makes a charge at Glaive as he leaps toward him. Everyone was surprised by how far he leap to Glaive and tackled the armored individual straight to the ground with him at the same time.

But Glaive removed himself from Nexus and got up before slashing him a few times across the chest. This made Nexus stagger a few feet back before he moved out of the way from the next slash and punched him hard in the chest, making Glaive screamed in pain.

Nexus delivers few more punches which send him to stagger backward in the process. Nexus soon charge forward and performed a mid-air jump kick onto Glaive's chest, leading to Glaive being smacked hard against a tree.

This made Glaive soon screamed in frustration before his armor starting to crack and shatter to reveal who was inside the armor, a white and red monster that resembled a cockroach appeared instead.

"What…?!" Nexus exclaimed in surprise.

The cockroach-like monster soon fired energy slash at him, but Nexus moved out of the way and destroying most of the woods in the process. He soon got close to the monster and started brawling with him. The white and red cockroach kicked him in the gut, sent Nexus stagger backward. Then the albino monster soon slashed him with the blade from his right arm, several times.

Shuka stares at Glaive's sword that remains on the field and got an idea.

"Master! Used this!" She shouts before sending the sword straight to his direction.

Nexus turned around and caught the hilt of the sword in his hand and used it to blocked the monster's attack. He soon used the sword to knocked the albino monster back from him and looks at the sword in his hand.

"Could I…?" Nexus muttered before pressed one of the buttons on his belt around his waist.

Soon Glaive's sword morphed into a large broadsword with golden edges and purple hilt. The albino monster tried to unleashed energy slashes at him, but Nexus used his new weapon to deflected the attacks before charging forward.

The two clashed with each other with sharp weapons collided against each other. Nexus seeing that neither side are back down, he soon pushed the albino monster back and slamming against a nearby tree.

But the albino monster moved out of the way before unleashed more energy shots at Nexus who dodged them. Soon Nexus take a deep breath before the air around him starting to gathering into his belt and channeling into his legs.

"Time to end this…!" Nexus shouts before starts to run toward him and jump into the air.

When the albino monster tried to attack him with an energy attack that went passed Nexus who was cover in a powerful barrier of wind and coming down at him with a downward kick straight to his chest.

The monster was surprised and tried to hold back against Nexus's Rider Kick with his arms, but what shock was the power behind Nexus's kick increasing further and he couldn't hold him back until the attack went through him as a large explosion has occurred.

Lora and Shuka come to the scene after the smoke from the explosion faded and saw what's going on. The albino monster's body soon dissolved, but in its place was a large cobalt crystal in the middle of the crater.

(OST ended)

Nexus caught his breathes before his form reversal on its own while looking at the cobalt crystal in the center until his sister and Shuka coming to his side.

"Isamu-nii, are you alright?" Lora asked with a concerned expression.

"Don't worry, Lora. I'm fine…" Isamu assured. "Shuka, do you have any ideas on what this crystal is?" He soon pressed for more information.

"If it was I think it is. Please point the Nexus Ring at the crystal." Shuka respond.

Isamu turned and looks at the cobalt crystal before getting out the Nexus Ring. He then pointed it straight to the crystal as something happen to the crystal.

The crystal itself dissolved as it was absorbed into the Nexus Ring before Isamu and Lora look surprised at what occurs.

"Another card…?" They respond as Isamu picks up the new card and looked at it.

In the card, was an armored warrior clad in a blue bodysuit with silver armor and spades depicted on the shoulders and chest. The helmet was blue save for the silver face and the single horn rising from it. The eyes were two red orbs in which could be used to see through. On the left arm was a black box, which was attached to the gauntlet and had a clear panel on the front with a slit at the side for something to slide out of it. Around the figure's waist is a red belt that resembled links of card and the buckle had a yellow spade symbol on it. In the armored being's hand was a similar weapon to Glaive.

"Kamen Rider Blade…" He read over the name before looking at Shuka for an answer. "You know this one?" he asked.

"He fought to protect humanity from the creatures known as Undead," Shuka confirmed. "It should've been impossible for that thing like that still exists."

"Do you know what it is?" Lora questioned.

"It possible that what remains of Blade's power also contains the remnant of the enemy he fought and becomes a living wraith." Shuka hypothesis. "But it should've been impossible for them to break the seal on their own."

"You mean that you didn't know that this could happen?" Lora asked with a frown.

"Yes. And I'm sorry for my lack of knowledge about this." Shuka apologized.

"Take it easy, Lora. I think she didn't intend to scare us like that." Isamu said, placing his hand on her shoulder. "After all, we're in the same situation in the first place."

Lora takes a deep breath before opens her eyes. "I know… it just that we're the last people on earth and scares me that there are machines that could kill us." She admits.

"Isamu, how do you feel after your first transformation?" Asked Shuka.

"You weren't kidding… that is powerful," Isamu replied, looking at the Nexus Ring and the Rider Card in his other hand.

"You did well with obtaining your first card, but your fighting is inadequate," Shuka answered.

"Hey, I'm still new to this!" Isamu protest defensive, "Anyway, it better we get going before-" he soon stopped as he and others noticed another presence far from them.

Hovering over the ground was another machine, but this one has green eyes and carried a white flag.

"Another robot?" Lora asked.

Shuka was about to use her power until the robot spoked up.

"I am not hostile. Please don't hurt me!" The robot spoked to them, making their eyes wide in shock.

"Huh!?"

To be continued…


AN: This is the end of the first chapter of Kamen Rider Nexus- Ruined World. After a long time, I managed to get the inspiration to write the first chapter of a possibility full-length story.

The plot will be the same as I did for my realm of dream, but I thought of giving an additional to another character who would serve as a support and guide like Izu from Zero-One, in their goal of collecting the Rider Cards and leave this apocalyptic world behind.

Anyway, be sure to review or message me for any questions, comments, or concern. And don't be afraid to look at my other stories.