Author's Notes:

Hey guys! I'm back guess I'm being a little overconfident at this Fanfiction. But I hope that this is going to be good. And if it does, it's going to be one that you won't get your minds out off. Now then now that is out of the way. Let's get this show on the road, shall we?

Now then, before I started, I am going to say thank you for waiting! I hope that you enjoy this story!

Disclaimer: I don't own any of the characters appearing in this Fanfiction, they belong to Type Moon, Aniplex and Toei Company and that's it.

Prologue

2018: The Beginning of the Journey

3rd POV

In an unknown Throne room in a temple.

As we go to an unknown temple were there is a single white throne a black sphere above it, and branches surrounding the place, we saw a young man with black hair, blue eyes and is wearing a white T-shirt, black pants and dark shoes. The other was an armored man with golden accents and magenta eyes his body consist of miniature versions of armored men he is wearing a white belt with two watches attached on was a white and magenta watched and the other was a giant gold watch. Currently they are standing up against a golden monster with what appears to be a cross like shield embedded on the other side of the ground

"IT'S OVER, JUST LIKE I IMAGINED!" He said in a mocking tone.

The two people are now angry at this with the boy shouting, "GOETIA! YOU BASTARD!"

"THIS IS UNFORGIVABLE!" The Armored man shouted.

They then started to charge at the monster, only for the latter to push them back at a wave of his hand.

"FUTILE UTTERLY FUTILE! WE ARE INVICIBLE, AS LONG AS SOLOMON'S GRAND TEMPLE OF TIME EXIST, THE 72 DEMON GODS CONNOT PERISH! YOUR FLEETING LIVES, THE STRUGGLES OF THE HEROIC SPIRITS AS WELL AS THOSE KAMEN RIDERS, ALL OF IT IS MEANINGLESS! RELOADING THE THIRD NOBLE PHANTASM, YOU TWO CAN ALL DIE TOGETHER. I SUPPOSE I SHOULD GIVE YOU TWO ONE LAST CHANCE TO STRIKE ME. AT THE VERY I UNDERSTAND HOW YOU TWO FEEL RITSUKA FUJIMARU, SOUGO TOKIWA. DO IT IN THE MEMORY OF MASH KYRIELIGHT STRIKE ME WITH THOSE FRAIL FIST OF YOURS, AND THEN DIE!

This caused the two to grit their teeth and shouted, "FINE BY US!"

That is until someone said, "Wait, wait, wait! Calm yourself a little Fujimaru-kun, Tokiwa-kun."

They turn and saw two people one was an orange-haired man with a lab coat on, and the other was a brown-haired man wearing a trench coat and has a magenta camera. The orange-haired man then said, "A suicidal move isn't your style, try to save your strength for now."

"Yes, I agree and does this how a Demon King would act." The other man said.

"Doctor?"

"Tsukasa?"

"You're probably wondering how things ended this way? Two guys facing off against a monster, with two more people calming them down? Let's go back to where it all began to the time when two groups. The Chaldea Organization and the Kamen Riders cross paths. To fix time anomalies that threatened Humanity.


(Cue Opening Theme: Over Quartzer by Shuta Sueyoshi Ft ISSA)

The 'Grand Order' it is the name of the quest to save Humanity from its destruction. Now it's time for the Kamen Riders and Chaldea to complete this quest. Now it's time to take back our future!

Oh, yeah, Oh...

We saw Mash, Ritsuka, Roman, Da Vinci look and marveled at the Rider kicking Kamen Riders, when suddenly they saw Zi-O, Den O, Ghost, Build, Wizard and Decade walking as their faces are now shown.

sshun de tsukamitoru no sa Are you ready? (Are you lazy?)

We saw Sougo, Ryotaro and Ritsuka look at the clocks as they reach it, they then swing their arms the background starts rotating.

Atarashī rekishi wa soko ni Feel it! Feel it! (Crazy baby!)

We then saw Geiz throws his cloak as he transforms to Kamen Rider Geiz.

Feel it! Feel it! (Crazy baby!)

With Tsukuyomi and Mash walking as Tsukuyomi changes to Kamen Rider Tsukuyomi.

Hikari wo kate ni kasokushite

We then cut to Sougo and Tsukasa who then transform to Oma Zi-O and Decade Violent Emotions as their eyes turn red and slanted.

Konomama Shout it out! Shout it out!

We then saw Takeru appear with Makoto, Alain as well as the Heroes of history. With Roman, Sento, Haruto and Da Vinci at mission control

Ima wo susume yō

We then saw Woz turning his book as it shows a shadowy figure with white hair and black eyes.

Madō hi mo Ikudo tonaku Asu no tobira

We then saw the Shadowy figure as he walks, as an image shows the Heroes doing their daily routine. As we cut to Woz's book showing Oma Zi-O destroying things as well as the Shadowy figure sending creating golden cups.

tatake

As it changes to a white version of Woz. As we saw the Ridewatches.

Mitsumeta sono saki ni

We then saw the statues of the Riders appearing as Geiz activates his Ridewatch.

Tobikonde mitara

As the statues continue to appear, as Sougo activates his watch with Ritsuka, Tsukasa, Takeru and Ryotaro watching him.

Believe Yourself!

Sougo, Tsukasa, Ryotaro and Takeru transforms into their Rider Forms.

Toki no ame Surinukete Tomo ni

We then saw the Riders riding their backs, as Shadowy figures started walking. As the Rider kicks started moving.

You, Over "Quartzer"

We then saw Zi-O riding through the blaze.

Mirai wo koe yō

We then saw heroes standing with serious looks on their eyes.

Kako no ishi wa Uso de wa azamuke nai

We then saw the Riders as well as the Servants fighting some enemies. With Woz using his Kamen Rider Ginga Miridewatch.

Kanjiro sō Nexus Future

We then saw Tsukuyomi and Mash walking down the stairs, as the scenery started changing.

Now, Over "Quartzer"

We then saw Zi-O using his sword.

Mabayui sekai Misete

As it switches to Geiz with them duking it out as the title appears.


Sougo POV

Inside the 9 5 DO Clock repair shop, a year earlier

We then saw then same armored man only as a teenage boy with brown hair and pink polo shirt, brown pants and brown shoes his name is Sougo Tokiwa AKA Kamen Rider Zi-O. Inside a clock repair shop going to its dining room shouting, "Uncle! Is breakfast ready?"

"Yes, it's ready, Sougo-kun!" An old man shouted, he was wearing glasses with slightly white hair wearing a black vest and yellow shirt and is now currently getting the plates to the table.

"Thanks uncle!" He then said as he sits down and said, "Itadakimasu!" He then started to eat as he continues to eat, he heard the door bell ringing. With Junichiro saying.

"I'll get it." He then opened the door and it was a group of two teenagers, one was a female with black hair that was a Hime cut style, wearing a school uniform consisting of a white sailor uniform and dark skirt as well as white stocking and brown shoes. And the other was a boy with spike up hair wearing a black t-shirt with dark pants and shoes. This are Alpina Tsukuyomi and Keito 'Geiz' Myokoin AKA Kamen Rider Tsukuyomi and Kamen Rider Geiz.

"Hey Sougo!" The two greeted Sougo.

"Tsukuyomi! Geiz!" Sougo greeted back.

"Man... It's been a long time, huh?" Tsukuyomi said. As she and Geiz started to eat.

"You got that right."

"You may be wondering why they are so familiar with each other. Well, that's because they are the Time Riders. You see they have work together to stop Tsukuyomi's malevolent brother, Swartz who was intent on becoming king and ruling the world. By merging timelines and dimensions, but at the end of it all. Sougo uses his Rider powers to reset time. At the cost of his powers, although recently he and his group, managed to regain their powers. Fighting threats like Finis and Another Diend. With them at some point regaining their memories as Kamen Riders."

As the group continue to eat, they heard a voice saying, "My, my you are really enjoying your breakfast my Demon King." Sougo turned and saw that it was a group of two men one was the magenta camera holding man and the other man with black hair that was swayed on the right side, wearing a grey jacket, black scarf and is holding a book.

"Tsukasa? Woz? What are you two doing here?"

"Well, about that, Zi-O while I was doing my own thing, I sense a timeline disturbance."

This caused Sougo, Geiz and Tsukuyomi to be shocked.

"Then what should we do to fix this?!" Geiz and Tsukuyomi asked.

"Well... We're going back in time to a city called 'Fuyuki'. In the year 2004, but we aren't going alone." Woz answered.

"What do you mean?" Sougo asked, when suddenly they heard what appears to be a train appearing outside. They then ran towards the door.

Outside the 9 5 DO clock repair shop

As the group go outside the shop, they then saw a train with a white and red them in it. they then saw a young man with hair that almost reaches to his shoulders. He was wearing a black jacket with a white t-shirt underneath as well as dark pants and blue shoes. This is Ryotaro Nogami AKA Kamen Rider Den-O and the train is called the Den-liner

"Nogami-san! What are you doing here?" Tsukuyomi asked.

"Well..."

"We're going to help of course!" A voice called out from the train, it was a red Oni like creature this is Momotaros.

"Momotaros?!"

"Hey, been a while. Magenta boy as well as Prophet-yaro here wants us to help you guys."

"I see... Well let's get going then. We don't want the timeline to be messed up like last time."

"YEAH!"

Ritsuka POV

Inside Chaldea, Antarctica

Meanwhile at the same time, on the other side of the world. We saw the black-haired, blue eyed boy Ritsuka talking to a girl with short lavender hair, wearing glasses, a white jacket with a sleeveless dark coat with a red tie underneath. This is Mash Kyrielight

"Are you calm now?"

"Thanks. When I got here, I remember undergoing a simulation..."

Mash then said, "The Spiritron dive, right? If you're not used to it, it might put a lot of stress in your brain."

Ritsuke then clutches his head in pain, "My head is still pounding."

"Fou is the one who found you here on the floor, unable to regain tour consciousness. Those are the details." Mash replied.

"Fou?"

They then saw what appears to be a white little furry creature running towards them saying, "Fou"

The creature then went towards Mash as he went to the latter's left shoulder with Ritsuka asking, "A-Are you okay?"

"Y-Yes... This squirrel-like beast is Fou. It has the special right to roam Chaldea freely." Fou then went towards Ritsuka head as he goes back to the ground, and then walks off.

"As you can see, He comes and goes as he please."

An unusual creature, isn't it

"He rarely approaches anyone except me, so it seems he's taken a liking to you Senpai."

"Huh..." This caused Ritsuka to look at Mash confusingly.

"You've just become Fou's second attendant in Chaldea."

"Th-Thank you."

"By the way, are you one of the people with master potential who they gathered for Rayshifting?" Mash asked.

"Oh, yeah. They said I was qualified to make a contract with a servant, so somebody from here invited me. by the way what's Rayshifting?"

"Have you come here without knowing what you're going to do?"

"Well, they were very passionate about inviting me here."

"That's a new one."

"Really?" Ritsuka replied.

"Chaldea is a research facility and observatory that gathers researchers of every stripe, from sorcery to science, all for the purpose of continuing the history of humankind as soon as possible. Our top researchers have developed Chaldeas. A global environmental model.

"Chaldeas?"

"It was proposed that planets had souls, so this miniature Earth was replicated to reflect that soul. 'As long as the light of civilization burns in Chaldeas", humanity is guaranteed to last at least for another 100 years. But the light has suddenly begun to die. If the light disappears that means civilization will come to an end. According to our observations, humanity becomes extinct in December 2019."

"What?"

"A close examination of the information has revealed a new abnormality has revealed a new abnormality. That's spatial Singularity F. We discovered from 2004 to 2019 CE, there was a suburban city in Japan that was an 'unobservable area' and did not exist in history. Chaldea assumed this is the cause of humanity's extinction, and proposed the Rayshift experiment to the United Nations, which received approval. Rayshift turns humans into Spiritons and sends them back to the past to intervene in certain events. In other words, it's like time travel. By this means we can transfer to the past and investigate the future's disappearance and destroy it. And that is the idea behind Rayshift, which Chaldea is currently trying to conduct."

This caused Ritsuka to be surprised, "I was invited to join something that incredible?"

"Surprised?"

"Yeah..."

"So, Time Travel is actually possible now?" Ritsuka said, "Oh that's right." He then holds out his hand to Mash while saying, "Sorry, I should have said before. I'm Ritsuka Fujimaru. I apologized for not making a more impressive self-introduction, but nice to meet you."

They then shake hands with Ritsuka asking, "How long have you been here?"

"Here... Two years."

"Then you're the 'Senpai', right?"

"No, everyone is a 'Senpai' to me."

Ritsuka then asked, "What's your name? Don't tell me you're 'not someone worth mentioning' okay?"

"My name is..." But before Mash could answer they heard someone saying.

"Mash. Mash Kyrielight. So, this is where you've been." It was man in green clothes with long shaggy brown hair his eyes are closed, and he is smiling he is also wearing a green hat.

"Professor Lev."

"The briefing on the master potentials is about to begin. Come quickly to the control room." He then looks at Ritsuka and asked, "Oh who are you?"He then check the data on his wristwatch. And said, "Number 48... Oh, one of the common recruits. Please don't be disappointed. All of you are necessary."

Ritsuka nodded.

"I'm Lev Lainur I'm one of the engineers here."

"H-hello." Ritsuka replied.

"By the way, shouldn't you be going, too?

"Where?"

"The Briefing. If you're late, the director will glare at you for an entire year."

This caused Ritsuka to be scared, "U-Um, where is it?"

"Over here!' Mash said as he grabs Ritsuka hand as they went to the briefing room. With Lev then follow suit.

Author's Notes:

And this is the prologue hope you have a good time. By the way I changed the date from 2015 to 2019 to better suit the Kamen Rider continuity.