Beta read by someone.

Time stood still as Ritsuka and Mashu were up against this world's version of Sasaki Kojirou, who looks exactly the same from Chaldea's version. Mashu was in front of Ritsuka protectively, her shield raised. Meanwhile, Ritsuka gulped at the situation he was in. "Okay, we just so happened to land at the same temple from before…with a servant. Not to mention that said servant happens to be Sasaki Kojirou…" he thought to himself.

"Answer me. Who are you?" Sasaki asked.

"Well…my name is Fujimaru Ritsuka, and this person in front of me is Mashu Kyrelight. Believe it or not…but we're from an alternate universe."

"Oh? And what is your purpose for coming here?"

"Senpai? Is it okay to tell him? I mean, even though he may be Sasaki-san, he could be different from the one we know." Mashu whispered.

"I know Mashu, but we're a bit cornered here. I think we have no choice here." Ritsuka whispered back. "Well, we're trying to search for two people here."

"Who?"

Ritsuka gulped again. "Emiya Shirou and Leonardo Da Vinci."

Sasaki's eyes widened upon hearing the first name. "Ah, you are searching for the young lad?" he said with nostalgia in his tone of voice.

Ritsuka and Mashu's eyes soon widened too upon hearing Sasaki's tone of voice. "You know Shirou-san?" Mashu asked.

"Yeah. He's the one who gave me good sandwiches. I'll admit, they tasted very good."

Both Ritsuka and Mashu looked at each for a moment. "Since when did Sasaki-san liked sandwiches?" Mashu whispered to Ritsuka.

"I have no idea. That's probably a thing in this world only. Although, no one in Chaldea's cafeteria has given him a sandwich before actually. Maybe next time, we'll give him one." Ritsuka replied.

"Hey, what is going on here, Assassin?"

Ritsuka and Mashu jumped at the voice and turned around to see Kuzuki Souichirou, walking out of the temple doors. "Looks like we have some uninvited guests here." Souichirou said. "Who are they, Assassin?"

"Well…believe it or not, they're from an alternate universe. From an organization called Chaldea." Sasaki replied.

"Oh? And what is their goal?"

"Well, they're here to find Emiya Shirou. And someone else named Leonardo Da Vinci."

Souchirou raised an eyebrow. "What? Those two are here to find Emiya? And Leonardo Da Vinci? To my knowledge, that man died a long time ago. Explain."

"Well-"

"So you two are from Chaldea as well?"

Everyone turned to see Medea, who just appeared out of nowhere. "I take it that you must be searching for the boy and Leonardo Da Vinci?"

"Y-Yes! But how did you know?" Mashu asked.

"Well, I just had the luxury of meeting them earlier at their house. And in case you were wondering, they are fine and are staying over there at the moment." Medea said. "I'll admit, the servant version of the boy has quite the skill set. He might as well be the perfect house husband. No wonder those girls are in love with him."

"Eh? It's the same here as well?" Ritsuka and Mashu thought in unison.

"Caster, you're saying that there are two Emiyas now? And one of them is a servant?" Souichirou asked.

"Yes."

"Eh. So the young man becomes a servant in the future…sounds interesting. What class is he?" Sasaki asked.

"He's a Saber-class servant. And believe it or not, strong enough to beat the King of Heroes."

That piqued Sasaki's interest even further. "Ho? Strength that surpasses the King of Heroes…now I wish to spar against in the near future."

At that moment, Medea suddenly appeared in front of Ritsuka and Mashu. "W-What?" Ritsuka asked.

"Give me a moment. I need to check if your story is true or not." Medea then brought out her staff and enchanted a spell on Ritsuka's head. For a moment, Ritsuka braced himself before realizing that he was not feeling anything. After a few seconds, the spell stopped. "Looks like you're telling the truth."

"Eh? Did you just-" Mashu asked, but was cut off.

"Read through his mind and memories? Yes." Medea replied with a small sigh. "Anyways, it's really getting late, so why don't you two stay at the temple for the night?"

"Eh? Is that a wise choice, master?" Sasaki asked.

"Yes. I have looked through this boy's mind, and it seems to connect with what Da Vinci said earlier." Medea then turned to Ritsuka and Mashu. "Well? How about it?"

Mashu looked at Ritsuka. "Do you think we should take on Medea-san's offer?"

"Well…I suppose so. It seems she doesn't have any intention to harm us. Although be wary of any suspicious things." Ritsuka replied, which Mashu nodded in reply.

Soon, Souchirou opened the nearby house doors. "Well then, come on in. Make sure to take off your shoes first."

Ritsuka and Mashu then went into the house. "Well now that we're here, let's hope to find Shirou quickly before something bad happens…" Ritsuka thought.

(The next day…)

Shirou let out a small yawn as he was waking up from his sleep. As he did, memories of his life began to resurge in his head. "It's been a long time since I've woken up like this…" he thought to himself as he got out of the futon. As he did, he dressed himself up and headed towards the living room/kitchen. When he arrived, the first thing he saw was himself in the kitchen, and Arturia and Da Vinci in the living room.

"Oh. I see you already started cooking. Need any help?" Shirou asked.

"Yeah. Help me with the dishes over there." the other Shirou replied.

"Sure."

Soon, Shirou joined his counterpart and the two began to work on the dishes while Arturia and Da Vinci watched. "Wow. Even though it's in front of me…seeing two Shirous is something I've never thought to see." Arturia said.

"Really? Or are you excited over the fact that you get double the meals from Shirou?" Da Vinci asked.

"Well…that too." Arturia said with a small blush on her face.

Soon, both Shirous placed the breakfast on the table and everyone began to eat…or so as they thought.

"Shirou! I'm here for breakfast!"

In an instant, Taiga ran through the front door towards the living room…and was greeted with two Shirous at the dinner table. For a moment, things were silent…until she lost it.

"WHAT THE HECK IS THIS?!"

Both Shirous sighed at the situation in front of them-a hysterical Taiga looking at both Shirous, Arturia, and Da Vinci at the dinner table. "Well, I knew this was going to happen eventually. To be honest, I was surprised that it did not happen last night considering Fuji-nee always comes over for meals…" Shirou thought to himself.

"Hey, what do we do?" the other Shirou whispered.

"I don't know. I haven't thought of a plan for this." Shirou replied.

"Shirou, is there any way to calm Taiga down?" Arturia whispered.

"I have no idea."

"Huh. So the host for Jaguar-Man was always like this…now it's hard to tell if that's actually Jaguar-Man or not." Da Vinci muttered to herself.

"HEY! ARE ALL OF YOU LISTENING TO ME?! I DEMAND AN EXPLANATION ON WHY THERE ARE TWO SHIROUS!" Taiga yelled.

Everyone else stiffened from Taiga's loud voice. For a moment, they were looking at each other, thinking of a way to defuse the situation. Then the other Shirou decided to speak up. "Um…Fuji-nee…believe it or not…this person right here is…my long lost twin brother."

"Huh?! Your long lost twin brother?!" Taiga exclaimed.

"Y-Yes…"

"And who is this person next to him?!" she said as she looked at Da Vinci.

"Well…"

"I'm his co-worker. We're from the same company, and we stopped by for a visit." Da Vinci replied/lied.

For a moment, Taiga stared at Da Vinci for a moment, studying her. "Hm…you look a lot like the Mona Lisa…what is your name?"

"Emilia. Emilia…Watson."

"And you?" Taiga said as she turned to Shirou.

"Um…Uryuu. Ishida Uryuu." Shirou said, trying to come up with a fake name.

For a moment, Taiga was silent, making everyone nervous. "I have a feeling she is not going to fall for that obvious lie…" Shirou thought to himself.

"Okay! Welcome to the family!" Taiga said cheerfully.

Everyone was dumbfounded at the surprise turn of events. "She took it?! That easily?!"

Shirou let out a small sigh as he looked at the sky. "Wow. I can not believe Fuji-nee actually believed I am his long lost twin brother. Sounds weird considering that I'm his future self from another timeline. Still though, how did she think we are twins? I mean, that lie was too unrealistic to believe in! Da Vinci's lie could be understandable, but the other lie was not!"

As Shirou was in his thoughts, he felt a familiar presence coming towards him. He turned around to see Arturia coming towards him. "Oh, hey there…Arturia."

"Hey there…Shirou."

For a moment, awkwardness was in the air as both knew that they were not the same person they were used to seeing. Soon, Arturia sat down next to Shirou. For a short moment, silence was still in the air.

"So…what do you want to talk about?" Shirou asked, breaking the silence.

"Well…for starters, what happened to you? After the war I mean." Arturia replied.

Shirou let out a small sigh. "It's a long story. After the war was over, I ended up studying at the Clock Tower with Rin for a while until graduation. Afterwards, I wandered around the world, helping people in need. During my travels, I happened to know my ancestry by meeting the spirit of Sengo Muramasa himself."

"Which you end up fusing with, turning you into a pseudo-servant vessel."

"Yes. After that happened, I would continue doing the same thing as before. Although it got a lot harder than before. For example, I had to deal with a dead apostle ancestor, and killing him was not easy considering he had a reality marble."

"A dead apostle ancestor?!"

Shirou nodded in reply. "Then a year later, I had to deal with an out-of-control magus who created the Philosopher's Stone and was planning on using it to kill anyone that he saw on sight. And it turns out, killing a lot of people was how the Philosopher's Stone was made in the first place. Obviously, I had to put him down and destroy the stone in the end."

Arturia was disgusted at the magus's actions. "That's horrible! Such an action like this is not acceptable! I'm glad that you ended it before it could get any worse."

"Yeah. And then…there was the event that nearly killed me."

Upon hearing those words, Arturia's face darkened for a bit. "What…do you mean…Shirou?" she asked sweetly, but deadly.

Shirou gulped. "Well…let's just say…I had to go up against an evil, immortal, interdimensional, space god…who can control the Akashic Records from another universe…and can destroy other universes…"

For a moment, Arturia did not say anything. "Arturia?"

"Shirou…you and I are going to have a long conversation after this…got it?"

Shirou gulped again. "Y-Yes…"

"Good." She then walked away, leaving Shirou slightly scared.

"Jeez, Arturia can still be scary when it comes to my health. Speaking of which, where did Da Vinci run off to?"

(Meanwhile…)

"Hm…looks like this is no good either." Da Vinci thought as she looked at the ground in front of her. Currently, she was on the search for a really good leyline to use as a way to get back to Chaldea. "Well, it looks like the only place to check is the Fuyuki temple on the hill."

Soon, Da Vinci left the area she was in and went for her destination. As she arrived, she gulped for a moment after seeing the amount of stairs that lead up to the temple. "Well…looks like it's going to be a long trip to get up there…well, here goes nothing…"

Da Vinci then went up the stairs…and was experiencing shortness of breath every time she took a step. "Jeez, this…is…painful! And I'm a servant nonetheless! Just how does Shirou deal with this when he was alive?!"

Eventually, she finally reached the temple. As she did, she was greeted with Sasaki, who happened to be waiting at the temple's gate. "Hm? Who are you? State yourself." he stated.

"Oh! Um…I'm a tourist?" she asked, hoping that Sasaki would buy that excuse. To be fair, she is technically a tourist.

"Don't lie. I can sense the amount of mana you have. I suppose…you are a Caster-class servant?"

Da Vinci let out a small sigh. "Guess that did not work…" she muttered to herself before summoning her staff. "Well, considering that you asked…I'm Leonardo Da Vinci."

Upon hearing her name, Sasaki's eyes widened. "Oh? So that means you are the one those two were talking about."

"Eh? Those two? Who are you referring to?"

And as if on cue, the temple doors were opened, revealing Ritsuka and Mashu. "Hey Sasaki, me and Mashu are going…to be out…for a bit…"

"Da Vinci-san?!" Mashu exclaimed in surprise with a bit of happiness.

"Da Vinci! You're here! Finally!" Ritsuka exclaimed in relief and happiness.

Instantly, Ritsuka and Mashu headed out from the temple doors and ran towards Da Vinci, giving her a hug in the process while pushing her down at the same time.

"Whoa! That is quite the hug you two have! In fact, I think you two are crushing me right now!"

Upon hearing her words, Ritsuka and Mashu let go of her. "Sorry." Ritsuka said.

Da Vinci let out a small sigh before continuing the conversation. "So, I take it that you've been staying here? How did you get here?"

"Y-Yes! We arrived here by tracing the energy from the vortex, which brought us here! Upon arriving, we ended up at this temple!" Mashu replied.

"I see. Who was nice enough to take care of you while you were here?"

"That would be me, Da Vinci." Medea said as she arrived from the temple doors.

"Ah. Good morning Medea. I take it that you live here?" Da Vinci asked.

"Yes. And now that you're here, I suppose you're trying to find a good leyline so that you can use it as a spot to get back to your world, correct?"

"Bingo! Now that Fujimaru-kun and Mashu are here, I can get started! Mashu, bring out your shield!"

"Y-Yes!" Mashu then brought out her shield.

"Medea, can you help me with the spells?"

"Well, creating a portal back to your world is something I've never tried to do, but I can give it a shot. Plus, this seems interesting to do." Medea replied.

"Great!" Da Vinci exclaimed in happiness. "All that is left then is to tell Shirou the news and that will be it. Hopefully nothing bad happens here…"

"Phew. Got the ingredients for tonight's dinner. Now all that is left to do is-" Shirou thought to himself before he sensed a certain someone. "This presence…so, it's him huh?"

Shortly, Shirou began to walk away towards a different path from the one he used to get to the market. As he was walking, that certain person was still following him, making him sigh. "He really wants this huh…well, it's better to get it over with."

Shirou and the person stopped at an empty street and Shirou put his bag of groceries by a nearby wall. "So…you really want to do this…King of Heroes?"

He then turned around to see Gilgamesh, who looked as arrogant as ever.

"Well then, let's see how much you can entertain me…faker."

And a fight began as the two brought out their weapons…

Author's note: Even though dead apostle ancestors do not exist in the fate worlds, I just put it in as a way to show a mix between worlds. Plus, this is fanfiction lol.