Author's Notes:

Hey, you all… Hope you like the prologue of the Babylonia Singularity, Now we're going to the good old US of A where Sougo and Ritsuka are now going to resolve the fifth Singularity… Now I know that this is somewhat sudden, but you all somewhat know who I am.

Now then in this Prologue, the heroes are now preparing for the Rayshift as they talk about the Singularity and the man calling himself Solomon. All the while Ritsuka waking up from a dream.

Now then… Let's get into writing shall we?

Disclaimers: I don't own any of the characters appearing in this Fanfiction, they belong to their respective creators: Kinoko Nasu, Takashi Takeuchi, Shotaro Ishinomori and Toei Company

Prologue:

2019: Time to go to the wild west.

3rd POV

In an unknown desert

Unknown year

We open the scene to a man with orange hair panting, "Hah, hah... Hah..."

"You don't know when to give up, do you, punk? I really want to get this over with." A voice called out and it was revealed to be a shirtless man wearing a brown cloak and holding a spear.

"...Damn you!" He was then hit again, "Ugh! The amount of curses covering your body... They're strong enough for you to shoulder an entire nation! Damn you! If you possess this much strength... Why? Why have you fallen to Ravana's level!? Your skill is not something that can be given, but obtained only through sheer will and determination! You could've transcended good and evil! It shouldn't be possible for you to be corrupted like this!"

"Huh? What are you talking about? I'm like this because I've transcended good and evil. I kill my enemies. I will keep killing until one of us dies. That's the only law on the battlefield." The Cloaked man shouted back.

"Look at this mountain of corpses! Is it your law to slaughter the weak with overwhelming brutality!?"

"Why would I waste my time worrying about something so trivial? What? Don't tell me you actually judge your enemy's worth? You would let them live if they're weak, yet kill them if they're strong? —That's ridiculous. If you want to kill something in a humane way, do it at a ranch. This is a battlefield. I'm tired of hearing your theories. Just die." He then readied his lance, "It's go time, my demonic thorn of death!"

"Ugh!"

BRAHMASTRA! (ブラフマーストラ (羅刹を穿つ不滅) FULL POWER!

"Ha! See, you do have it in you. Too bad, you're just a circus clown."

GAE BOLG! (ゲイ・ボルク (刺し穿つ死棘の槍)

The two attacks clashed with the cloaked man's attack overwhelms the orange haired man's attack, "...Gaaaaaaaaaaahhhhhhhhhh!" However the orange haired man is still standing.

"–What? How are you still standing? What a pain. You still hang on to life despite having 80% of your heart destroyed. Servants–Heroes, can be such a nuisance."

"Gar... Hah... I can't...die here... Not...until I see...Sita!" The orange haired man muttered.

"Who the hell is that? Like I care."

"...Ugh..."

Suddenly the cloaked man sense something, "Huh?"

It was a robot saying, "Servant response confirmed. Commencing countermeasures."

"...That trash from the West, huh?"

"Now, Geronimo!" A soldier shouted.

"What's...going on?"

A native American man who was called Geronimo answered, "Just come with me! We have to escape while they keep him busy!" The orang man looks at him.

"Who... Who are you?"

"I see now. You all want to get in my way. In that case, you're all my enemies. In other words, this is a new battlefield! Let me first extend my welcome by killing you!" The cloaked man grinned.

"Geronimo, go! We'll hold him off here!"

"...Thank you!" Geronimo shouted as he and the orange haired man flee.

"Hah! Ready to sacrifice yourself? Well, look at you! Your morale is pretty high for a mere pawn!"

The soldier gritted his teeth, "We won't...lose... This land...will not...yield!" However the soldier was stabbed by the lance with the man grinning manically.

"Oops, I screwed up. He was too annoying, so I just crushed him. He pointed his blade toward the king of a nation. I really should just cut off his head and display it as a warning but... I guess there are more where he came from. Hey punk, let's continue. I've already crushed your insides. How about I go for your skull next and– "He then turn to the direction of Geronimo and the orange haired man only to be revealed that the two are gone, "...What the hell, he's gone already. Tch, that's no fun. Oh well, injuries from my spear's thorn are incurable. He'll eventually die."

Suddenly a voice called out, "–Hehehe, you look braver than ever. Say, which do you like better, to fight, or to kill?" It was a woman with pink hair, yellow eyes, and white clothing.

"Huh? Is there any difference? Or what? Are you one of those idiots who think of eating and living as two separate things?" The man asked the woman.

"...You're funny, Cú. You really are different. You're like a wild beast. Even in life, there was a part of you that somehow felt like a beast in human's clothing... But this time, I can't sense a single trace of impurity! You're without a doubt a king among all violent beasts! Truly fantastic. I wonder if the hero Cú Chulainn lost all his rationality by being given an imaginary concept. But I like both forms of Cú.

Hehe, hehehe, hehehehe!" The woman exclaimed.

The man now called Cu replied, "Well, that's number thirty... Huh? Woman, did you say something? Either way, job's done. I'm going to sleep now. Wake me up if anything happens."

"...Oh boy. I'm happy to see you all rough and tough, but it's a shame you're strangely indifferent now. Well, it's fine either way. You probably won't have much chance to show off anymore. Because from here on, it's my turn! Here comes the innocent, perfect, much beloved Queen Medb "

A soldier then went towards them asking, "...What are your orders?"

"Come, my warriors! It's time to advance our troops! Sing my praises, loudly! Praise me, and kill my enemies! Medb is the best! Oh, my dear and sweet warriors! Come on, we're almost there! This nation! This land! Everything will be ours! Eternal, an eternal nation. We'll create a utopia! If they oppose me, kill them! If they don't oppose me, still kill them! Foolish civilians, unwise leaders, and weak soldiers! I need none of them! The United States will be no more, and from its ashes we'll create a new nation. It'll be an eternal nation only for us! One centered around us!"

Meanwhile, on Geronimo's location

Unknown year

We then switch focus on Geronimo and his group, as they check on the man, "How's his condition?"

"Terrible. It's amazing he could stay alive. So he's a Servant, too. Like you... Geronimo."

"Yes... We need as much manpower as we can get. Tell the shaman to give him the best treatment possible. But...things won't get better as they are now."

"Geronimo, can we talk for a minute?"

"What's going on?"

"Moments ago, the last fort in the East fell. The United Western States has retreated from the East. The East-West Civil War will drag on longer than it should. So it means– "

"This place will turn into what the missionary called "Purgatory."" Geronimo finished.

"What's the difference between Purgatory and Hell?" The soldier asked.

"No big difference. In either case, it is going to be harsh for us."

"What are we going to do?"

"You guys should continue infiltrating the Western forces in those costumes. Although many non-human creatures lurk among the Celts, the Western troops still have a lot of humans."

"Yes, understood."

"Don't worry. The star is finally starting to show movement. It seems the Mage's Association is getting serious... ...Wait, no. Perhaps the world is not moving, it's revolving. I hope...that this starlight is something that we can be proud of..."


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

Another Adventure begins with Zi-O and Ritsuka going to the wild west, as they discover something strange in the history of America.

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. As it cuts to Sougo then entered an infirmary where he saw Nightingale trying to amputate Ritsuka with Emu Hiiro and the others trying to stop her

Mirai wo koe yō

We then saw heroes standing with serious looks on their eyes. With Artoria Pendragon splitting into her three aspects. As two armies faced off in a desert. One led by Edison and the other led by Cu Alter

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. With Natsumi, Medusa and Kaitou appearing to take their hands.

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.


Unknown POV

In Chaldea Headquarters, Antarctica

Unknown year

We then open in a bedroom with someone saying, "—I woke up at the same time today. I checked my temperature. I checked my five senses. I think I've gotten quite used to waking up like this. Previously, my wake-up was a bit more gradual. I said my name out loud, so that I could understand it better. It was as if I was walking on thin ice, or sneaking in front of an animal in a blissful sleep. That's how I used to wake up. Like I was looking for my way in complete darkness. Of course it's different now. My self-consciousness is stable. I don't have to worry about my memory disappearing after each sleep. I am who I am. Today, too, I can feel that I am myself."

"Good morning. You're on time as usual. Ready for breakfast? Your brain waves are stable. If you continue like this, you won't need to stay in this sterile chamber anymore. Then you can finally be a researcher at Chaldea. I will throw a celebration for you when that day comes. Do you have any requests? I'll try to get you anything within my capabilities."

"I couldn't think of what I wanted, but I thought of something I wanted to do. Though I knew this comfortable room was more than enough, I wanted to go outside, just once."

"Well. You'll get out pretty soon. What I want to give you is more like a gift, not something simple like what you just said..."

"I expressed my intention by shaking my head. What I wanted to see was not outside of my room, but Chaldea. I wanted to see the outside world with my own eyes, not through pictures."

"Oh, I see... So you want to actually see the sea and the grass field from the VR program I showed you the other day. That'll be difficult. Chaldea is on top of a snowy mountain, 6,000 meters above sea level. Part of it is to prevent top secrets from leaking. Either way, you'll see nothing but a blizzard if you go outside. Maybe you can see the ravine when the weather clears up once a year Even so, your body can't withstand the outside world. I think it's best for you to change your way of thinking. If you want to see nature, then VR is enough. It's not worth it for you to shorten your already short activation period." The man explained.

"His smile seemed so troubled, like he was sorry for me. His gaze avoided mine. ...It made me feel terribly sorry. I suppose what I said made him feel sad."

"Oh, but you'll be free anywhere within Chaldea. I will take responsibility and make sure to get the Director's approval. You can rest assured and wait for that day to come. I will think of a gift for you."

""Thank you," I replied. It was hard for me to think about what I wanted, but I was happy that anyone would care that much about me. I am very, very happy. Because today, I can spend another peaceful day without changes."

Ritsuka POV

In Chaldea Headquarters, Antarctica

Year 2019

We then see Ritsuka waking up with him muttering, "...That dream just now..." We then saw Sougo and Fou staring at him, "Hey you two…" This caused Sougo to stare at him with confusion.

"Hey Ritsuka! The heck is wrong with you?" Sougo asked.

"Fou? Fooou?"

"Wait... Am I crying?"

"Fou? Kyuuu...Fou, fooou!"

"Yeesh… We need to see the Doc, now!"

"Yup, times like this call for a doctor." Ritsuka agreed.

They then went towards the control room where they saw everyone, Mash then said, "Good morning, Senpai. Tokiwa-san. You two here to see the Doctor for something?"

"Oh, is that Fujimaru and Tokiwa? I'm glad you are here. I need your help convincing her. Mash fights in the front lines too much these days. As her physician I think she should take a break..." Romani explained.

"Yes… She is not listening to every word that we say…" Tsukuyomi added.

"That's not necessary. Senpai should be under the same conditions. As long as Senpai is fighting, I can't find any reason for me to rest." Mash said to Romani and Tsukuyomi.

"As you can see, she's insisting that she follow you. Fujimaru, what do you think?" Romani asked.

"So, Ritsuka, what are you going to say?"

"Mash will be fine. I'll protect her." Ritsuka smiled.

"Yes. I believe in you, Master."

"Sigh... Oh boy. Though I am happy she's become so dependable in the short while that I wasn't looking... Well, it's also true that things can be inconvenient unless Fujimaru is accompanied by Mash... Fine, I will allocate more budget to Mash's health management. But don't force too much on her." Romani sighed.

Mash then stated, "No need to worry, Doctor. Self-management is one of the things I'm good at. I'll tell Senpai immediately if I don't feel well. We must stay alert at all times during a Grand Order. Even a slight decrease in my performance would put Master in danger, so I won't hesitate to state my requests. I'll ask for medical attention when injured, and I'll ask for sweets when I need sugar. As far as that goes, I can guarantee you I am on top of that." Mash assured Romani.

"Guess we can't convince you, huh?" Geiz muttered.

"You said it…" Kaitou shrugged.

"Hmmm, you've really become quite dependable. Oh, it's a call from the Command Room. They're ready for the next Rayshift. Let's get going, Fujimaru, Tokiwa, Mash. We'll start with a briefing as usual."

"Yes. Let's hurry up, Senpai. Tokiwa-san."

"...Fooou..."

"Well, it's not like he's going anywhere." Ritsuka said.

"Let's start the briefing. The rest of Chaldea's staff, please pay attention as well. After the battle in London, we now know our enemy is the King of Mages, Solomon."

"Well except for us Kamen Riders, we are still not convinced that guy is Solomon." Makoto said.

"Okay… We're lucky we obtained all sorts of information... Though it was likely on purpose. Out of all the information we received, here's the important detail– "

"He will not attack us." Tsukasa muttered.

"That's right. It seems Solomon doesn't care about us taking down the other three Singularities. He made it clear that he won't attack us until then. Whatever the purpose, it doesn't look like he's lying."

"So, we can continue with our mission of correcting the Singularities?"

"Yes. First, we'll return human history back to its proper course. The problem is—"

"How to deal with the King of Mages, right? Grand Caster... He stands above all mages. I don't like the fact that there's a Caster who ranks higher than me, but I suppose it can't be helped. Inserting the reincarnated Demon Gods into each era... That's not something an ordinary person would think of. As a genius myself, I must admit... We currently have no idea how to track him, let alone defeat him."

"...You're right. We don't know how to track him."

"I agree and we don't even know his base." Sougo agreed.

"I hear the King of Mages had 72 Demon Gods serving under him. We've defeated at least three of them, that means– "

"There are 69 left... But there's no point counting them. If he's indeed the Grand Caster, he can replenish the lost Demon Gods as much as he wants."

"Yes, the familiar known as the "72 Demon Gods" is one single ritual, one single concept. In that case, all 72 of them must always exist. As long as they call themselves "Demon Gods," all 72 pillars will continue to be around Solomon regardless of shape or form." Romani explained.

"Yeah. Unless we defeat King Solomon, the summoner, the 72 Demon Gods will never disappear from this planet. I know we're in the dark regarding Solomon, but we do know what we have to do. Let's think about how to get rid of the Demon Gods after we're done with that. So, let's start talking about our current coordinates. This is a place that would surprise any mage." Romani said.

"Where is it?"

"North America. A superpower known as the "United States of America." You can't exclude this nation from history. This nation is insignificant when it comes to Magecraft, but historically it's as important as Rome."

"...Insignificant when it comes to Magecraft... I see, the Doctor is correct. It's true that the United States is still a young nation, and there're no official records of it ever holding a Holy Grail War." Mash replied.

"Hahaha. To me it's just the place that said I put codes in my paintings. When would I have time to do something like that when I'm painting? Even if I did, I'd only do it to spite my client."

"That aside, it's not like they're completely void of Magecraft. Apparently, they've developed their own style of Magecraft that could summon an Elemental down to Earth. I also confirmed that Heroic Spirits existed. There are deep-rooted legends of outlaws who would rebel against anything in that nation. Obviously, we can't treat this like places we've encountered before. I want you to proceed with your search carefully. —Then I'll start the Rayshift. Master Fujimaru, Tokiwa please start your preparations."

They then gathered the participants which were Ritsuka, Mash, Jeanne Alter, Emiya, the Artoria trio, Zi-O Riders, Decade Riders, Fourze and the Den-O Riders.

Unsummon Program, start. Spiritron Conversion, start. Rayshift starting in 3, 2, 1... All procedures cleared. Grand Order, commencing operation.

Author's Notes:

And that's for the prologue, guys!