Shirou was having a weird, or rather normal day.

It all started when he was practicing his magecraft in the training room. That's when Okita and Okita Alter came into the room after hearing rumors of a blacksmith in Chaldea. After giving them traced swords in which they were happy to receive, Shirou then went to the cafeteria along with them in tow.

It was then that Okita Alter declared Shirou as her and her counterpart's personal blacksmith, making the people in the cafeteria angry.

Which included the Arturias, Rins, Sakuras, Illyas, Miyu, Luvia, and Taiga.

And to make things even worse, during the chaos, a pink haired woman came out of nowhere and hugged Shirou while calling him "gramps."

Which led to the situation he was in right now; laying down on the ground as the pink haired woman was hugging him and called him "gramps" earlier.

Not wanting to be rude, Shirou then said something to the pink-haired woman.

"Uhm...excuse me, but I don't know you."

The woman let out a pout. "What?! You don't remember me?! After all what we've been through?!"

Everyone in cafeteria nearly freaked out after hearing those words. "WHAT DID SHE JUST SAY?!"

"Um...sorry, but I think you got the wrong person."

"Yeah. Who are you?" Okita Alter asked, not wanting to be left out.

"And how come you know Shirou?" Okita asked.

The woman then let go of Shirou and got up. "Gramps! It's me! Miyamoto Musashi!"

Shirou was shocked to hear this along with Okita and Okita Alter. "M-Miyamoto Musashi?! That Miyamoto Musashi!? The strongest swordsman in the history of Japan?! The founder of the Niten Ichi-ryu school of swordsmanship?! That's Musashi?! Okay, now I'm going crazy here!"

"Gramps?" Musashi asked, snapping Shirou out of his thoughts.

"Huh? Oh sorry," he replied as he got off from the floor. While he was doing that, he noticed Ritsuka and Mashu running towards them. As they arrived, Ritsuka was huffing for breath. "Master, are you all right?"

"Yeah...just...give...me...a few...more seconds..." Ritsuka huffed as he was gasping for air.

Musashi then looked at Rituska and said, "Hey Ritsuka! Why doesn't gramps remember me?"

Ritsuka looked at Musashi sheepishly and said, "Sorry Musashi...but that's not him."

Musashi was in disbelief. "What?!"

"Yeah. The person in front of you looks like gramps, but he isn't."

"Eh!? Then who is this person then?"

"Emiya Shirou, the pseudo-servant vessel to Sengo Muramasa, who you may know as gramps."

Musashi's eyes lit up upon hearing this. "The pseudo-servant vessel to gramps?! Well that's something new! Although why does he look similar to gramps?"

"Master, what's going on?"

"Well..." Ritsuka said as he began to explain what happened earlier...

(A few hours earlier...)

Ritsuka was at the summoning alter in Chaldea, waiting to see what kind of servant he would summon today. "What kind of servant I will get today? Maybe an Archer class? Or Saber class? Lancer? Caster? Berserker? Rider? Assassin? Ruler? Or Avenger?" he thought as he placed the saint quartz on the alter. As he did, he then stepped back to let the summoning alter do its magic.

"Senpai? Are you going to be okay this time?" Mashu asked.

"Yes. And this time, I'm not going to rage out from what the summoning system gives me. No matter what happens."

"Well...if you say so..."

At that moment, the summoning alter lit up, making Ritsuka anxious on what he was about to get for today. However, like what happened when he summoned Shirou a while ago, all he kept getting were Craft essences, black keys, mapo tofu, and a bunch of random stuff.

Despite having a calm face, he was slowly dying on the inside from the horrible RNG luck he was having.

"Damn it...it's just like last time...and I only have a few saint quartz left..." he thought as he slumped his head down.

"Senpai?" Mashu asked worryingly.

"Hm? Oh, yeah. I'm just a little down."

"Don't worry senpai. The summoning isn't over yet. You might get something good."

Ritsuka looked at Mashu. "You're right! The summoning isn't over yet! There's a few more summons left! I just need to gamble on my own luck!"

Mashu looked at Ritsuka with a smile. "That's the spirit senpai!"

Rituka then went back to the summoning alter, placed the saint quartz there, and went back to where Mashu was. It was then at that moment, the alter lit up, temporarily blinding the two from how bright the light was. The saint quartz then disappeared, then formed into multiple blue orbs. Then the blue orbs started to connect with each other and turned into a ring of blue sparks swirling around. Then the ring split into three and continued to swirl around.

As the light faded, it revealed a silver card showing a knight holding a sword with both hands. However, the card started to cackle as gold sparks moved around the card, turning it into a gold saber class card. The card then disappeared as a woman appeared.

The women had pink hair held up by a wooden black and red hair clip in a ponytail. She was wearing a low-cut blue and red kimono with wide sleeves that had intricate designs on it. The sleeves were kept shut with a simple clasp that allowed her belly to peak out through the folds. Four katanas were strapped onto her waist and her legs were covered in black stockings that were protected by sturdy red and blue leg armor. She opened her eyes; the color of her hair made her light-blue eyes stand out even more.

"Shinmen Musashi-no-Kami Fujiwara no Harunobubu...!? Sorry, let's do that over! Servant Saber, Shinmen Musashi has arrived!" she exclaimed. As she looked down, she saw Ritsuka and Mashu in front of her. "Ah! Ritsuka! It's been a while! Who's the girl over there?" she said in an excited tone.

Ritsuka smiled. "Yeah, welcome back Musashi. The person next to me is Mashu Kyrielight."

"N-Nice to meet you Musashi!" Mashu said nervously.

"Nice to meet you too Mashu!"

Ritsuka let out a sigh. "Anyways, how were your travels?"

"Well, they were interesting at the most. Fought against a lot of strong enemies here and there, and visited a lot of places," she replied with a smile on her face.

"Were they fun?"

Musashi grinned. "Obviously! Anyways, guess you're my master now huh?"

"Yeah. Welcome to Chaldea. Want a tour around the place?" Ritsuka said.

"Sure!"

Ritsuka and Mashu then gave Musashi a tour of the hallways of Chaldea, showing her the different rooms. However, during the tour, Ritsuka realized something that he forgot untill now.

"Wait a second...Shirou's here...oh crap! I forgot that Shirou looks like gramps, and considering how Musashi may react to when seeing Shirou...oh boy, this can't be good. Especially with all of the girls that know him...god, the amount of damage the girls will do when they see Musashi with Shirou..."

"Senpai? Are you okay?" Mashu asked with worry on her face.

"Huh? Oh yeah, I'm just worried about something..."

"About what?"

"Well...it's nothing that big...but...let's just hope that Shirou isn't around right now..."

"What do you mean by that senpai?"

"Well...just wait and see..."

Mashu was confused when hearing Ritsuka's answer. However, her confusion was quickly forgotten when she continued showing Musashi the rooms in Chaldea. As this continued, Musashi also met some of her friends and they had some quick reunions.

As time passed, nothing bad happened and the tour resumed without any problems. Ritsuka was relieved that nothing bad happened. "Well, guess I have nothing to worry about..."

However, his relief was short-lived.

As they were walking in the hallway, Ritsuka's fears became a reality.

Because in the distance was the doorway to the cafeteria, and Shirou was in front of it with Okita and Okita Alter.

"Gramps...?" Musashi muttered.

"Oh no! Why is Shirou over there right now?! And with Okita and Okita Alter?! Quick, I need to distract Musashi for a moment!"

However, in an instant, Musashi quickly left Ritsuka and Mashu and went straight towards where Shirou was, leaving Ritsuka with a groan and Mashu confused again.

"Senpai? What just happened?"

Ritsuka sighed. "Possibly the worst outcome I've ever hoped for!" He then ran towards where Musashi was going for.

"S-Senpai! Wait for me!"

"Gramps is here?! Why didn't Ritsuka tell me this?! Never mind that, he's here!" Musashi thought excitedly.

(Back to the present...)

"And that's what happened," Ritsuka said.

Shirou was in shock of what just happened. "So, what you're telling me is that earlier, you summoned Musashi and was giving her a tour of Chaldea alongside with Mashu. However, when Musashi happened to see me, she mistook me for Sengo Muramasa because she already met him before in which he has the same face as me and was wearing the same clothes as me?"

"Y-Yes..."

Shirou let out a sigh. "Jeez, I need to talk to Muramasa about this later..."

"Shirou?"

"It's nothing. Anyways, should we talk about this more in detail in the cafeteria?"

"I suppose so," Ritsuka replied.

"Great. How about you Mashu? Musashi?"

"Y-Yes!" Mashu said.

"I'm fine with that," Musashi replied.

"M-Me too!" Okita said.

"Me three," Okita Alter said.

The group of six then went into the cafeteria. As they went into the cafeteria, everyone was staring at them intensely.

However, most of the stares were focused on Musashi, in which she declared that she knew Shirou.

Ritsuka, Mashu, Okita, Okita Alter, and Musashi then sat at a table while Shirou went behind the counter, planning to make something for today's lunch.

"Let's see here...we got some ingredients for good dashi broth in the pot over there...let me see if there are any noodles I can use..." Shirou thought as he looked in the kitchen. As he went over to the fridge and opened it, he saw a package of udon noodles, tiger prawns, green onions, and kamaboko(fish cake). "Yes, I can use these..." He then brought the noodles out of the fridge along with the tiger prawns, green onions, kamaboko and he can use. "Hey master, is udon good for you today?"

"Yeah, I don't mind," Ritsuka replied.

However, as soon as Musashi heard the word "udon," she immediately lit up. "Yes please! It's been a while since I had some udon!" she said excitedly.

"I see...everyone else?"

"YES!" everyone besides EMIYA, EMIYA Alter, and Kiritsugu said.

Shirou sighed. "Well, this is going to take a while..."

Shirou then grabbed two giant pots and started filling one of them with water. As the water started to boil, he then added the dried bonito flakes and brought it to a boil. Once it started to boil, Shirou reduced the heat, simmered it for 30 seconds, and turned off the heat. He then waited for ten minutes to let the bonito flakes drop to the bottom of the pot. Then he strained the dashi and added soy sauce and mirin to it.

Outside of the kitchen, Ritsuka and Mashu felt an air of awkwardness between Musashi and the Arturias, Rins, Sakuras, Illyas, Miyu, Luvia, the Okitas, Irisviel, and Jaguar man in which the group of girls that knew Shirou were staring at Musashi intensely while Musashi was looking at Shirou cooking udon.

Eventually, the silence had to be broken as Jaguar man got out of her seat and went straight up to Musashi's face, demanding answers.

"W-What?" Musashi said.

"OKAY! THERE ARE A LOT OF QUESTIONS I WANT TO ASK YOU YOUNG LADY! FIRST OF ALL, WHO ARE YOU?! AND HOW DO YOU KNOW SHIROU?!" Jaguar man yelled, starting a trail of questions from the others.

"YEAH! I'VE NEVER SEEN YOU BEFORE AND YET YOU SAY YOU ALREADY KNOW EMIYA-KUN?! HOW?!" Ishtar and her counterparts yelled out.

"WHAT ARE YOUR INTENTIONS WITH SENPAI?!" Parvati, Kama, BB and her sisters yelled out.

"WHAT DO YOU WANT WITH ONII-CHAN?!" Illya, Kuro, Sitonai, and Miyu yelled out.

"DON'T TELL ME THAT YOU AND SHEROU ARE LOVERS, AREN'T YOU?!" Astraea exclaimed.

"TELL US HOW YOU KNOW SHIROU IMMEDIATELY!" Arturia and her counterparts yelled out.

"YEAH! AND YOU CLAIM TO BE MUSASHI?! THE LEGENDARY SWORDSMAN IN THE HISTORY OF JAPAN!? THAT'S IMPOSSIBLE!" Okita yelled out with Okita Alter nodding as well.

"Are you and my adoptive son lovers by any chance?!" Irisviel exclaimed excitedly.

Meanwhile, Kiritsugu, EMIYA, and EMIYA Alter looked at the scene and thought, "Just what did Shirou/my younger self get himself into this time...?"

Ritsuka and Mashu covered their ears to prevent themselves from getting ear damage. As the yelling ended, Rituka tried to ease the situation. "Listen everyone, try to calm down okay? This is Miyamoto Musashi, Chaldea's newest servant. I know all of you have questions after seeing what happened earlier, so let's all talk this out when Shirou is done making lunch, okay?"

After hearing Ritsuka's suggestion, the girls replied, "Fine..." Ritsuka let out a sigh, knowing that he temporarily diffused the situation.

"Senpai...is this what you were afraid for?" Mashu asked, remembering what Ritsuka said eariler.

"Yeah. Good thing the situation didn't spiral out of control..." Ritsuka said as he was glad that he got the situation under control...for the most part.

Meanwhile in the kitchen, Shirou was making the tempura shrimp. As he peeled and deveined the shrimp, he then detailed it to take out the moisture. He then rolled it in salt, starch, and a bit of sake. Afterwards, he started on making the batter in which he mixed beaten eggs with some cold water and whisked the flour into the mixture. He then lightly dusted the shrimp in the batter and deep fried it in the fryer. He then waited until the tempura shrimp was done, then he placed it on a cooling rack.

As Shirou was doing that, the udon noodles started boiling. Shirou then drained the noodles and placed them into bowls he prepared earlier. He poured the soup broth into the bowls and then started cutting the kamaboko and green onions into tiny pieces.

Lastly, he placed the tempura shrimp, sliced kamaboko, and greens onions onto the bowls.

"Lunch is ready!" Shirou yelled out as he presented the bowls in front of everyone. In an instant, everyone got out of their seats and each person grabbed a bowl of udon. As they did, they were in marvel as they looked at their bowls of udon Shirou made with some help from EMIYA.

Especially Musashi, since it's been a long time since she ever had a bowl of udon.

"This udon...looks amazing! Probably the best I've ever seen in quite a while! But how does it taste...?" Musashi thought as she grabbed her chopsticks, grabbed some udon noodles, and ate it. As she slurped up the noodles, she was in awe of the taste of the noodles. "Oh my god! This tastes good! This is probably the best udon I've ever had!"

And she wasn't wrong either. Everyone else was enjoying eating Shirou's udon. Especially the Arturias since they were emitting their usual happy aura when eating Shirou's food.

Eventually, everyone finished their udons with a smile on their faces.

"Well! That was good! Thanks for the meal Shirou!" Musashi said with a smile on his face.

"You can say that again. I even might consider making udon my favorite food, well...besides oden of course," Okita Alter said.

"Me too," Okita said.

As everyone was letting out sighs of relief of how good the food was, Jaguar man realized something.

It was time for answers.

"Ah! I just realized something!" Jaguar man said as she got out of her seat and went towards where Musashi was sitting. "Hey Musashi?! How do you know Shirou?!"

The rest the followed suit.

"That's right! What's your connection to Emiya-kun?!" Ishtar and her counterparts asked.

"What are your intentions with senpai?!" Parvati, Kama, BB and her sisters asked.

"What is your relationship with onii-chan?!" Illya, Kuro, Sitonai, and Miyu asked.

"Yeah! Don't tell me that you and Sherou are lovers, aren't you?!" Astraea exclaimed.

"Tell us how you know Shirou immediately!" Arturia and her counterparts exclaimed.

"Are you in love with my adoptive son by any chance?!" Irisviel exclaimed excitedly.

"Are you really Miyamoto Musashi?!" Okita and Okita Alter asked.

There was silence between Musashi and the other servants as she was trying to process the questions that she just received. For once, she was stunned with what was going on and asked Ritsuka for help.

"Uh Ritsuka...I just realized this...but who are these people?" Musashi asked.

Ritsuka let out a sigh. "They're servants who knew Shirou dearly in which you mistook for gramps earlier."

"I-I see..."

"Speaking of which, there's something I need to ask of you master," Shirou said as he cut in. "How did you know what Muramasa looks like? Have you two ever met before?"

"Well...yeah. It happened a while ago, along with Musashi as well. You want to hear the story?"

In an instant, everyone was interested in the story Ritsuka had to say. "Yes," they exclaimed.

"Well...do you remember the time when I suddenly fell into a coma one day Mashu?"

"Yes."

"Well, what happened was that during that time, I went into an alternate world when I happened to stumble upon Musashi. Afterwards, we stumbled upon a little girl and her baby sibling named Nui and Tasuke along with a monk named Houzouin Inshun. However, during the traveling, we were attacked by dead soldiers and a group of servants known as the "Heroic Swordsmen." During our first encounter with them, Inshun stayed behind to protect us...but..."

"But what?" Mashu asked.

"He was turned into an undead by some sort of sorcery and came after us. After managing to get away from him, we managed to find the place where Nui and Tasuke was staying at. And then..."

"That's where you happened to meet Sengo Muramasa, correct?" Shirou interrupted.

"Yes!" Musashi exclaimed happily. "Anyways, when we met gramps, Inshun came up behind us and tried to attack him. But gramps turned the tides on him by swinging his sword at him, pulverizing him!"

"I see...just one question. Why did you call him gramps?" Shirou asked.

"Well...that's what Nui calls him. Although I don't know why considering that he looks so young to be one..." Musashi replied.

Ritsuka sighed. "Me neither. Anyways, after dealing with the heroic swordsmen and gaining new allies, we found out the culprit of the heroic swordsmen and their actions."

"Who? Who was it?"

Ritsuka took a deep breath. "Amakusa Shirou Tokisada."

Shirou was surprised at what he just said. "Wait?! That Amakusa Shirou Tokisada?! The priest who wanted the salvation of humanity?! That Amakusa Shirou Tokisada?!"

"Yes. And don't worry, that one is from an alternate universe," Ritsuka said.

"Jeez...to think he was responsible for their actions...why did he do that?"

"Well...apparently, his main goal was the completion of the Onri Edo with the sacrifice of a princess of the Matsudaira clan. According to him, once the ritual is complete, not only that timeline will be engulfed by the darkness, but, like a curse transcending worlds, it will affect every timeline where the Tokugawa clan has left a trace in history, eventually reaching Chaldea and bringing a great calamity to the Time Tree itself. In order to do that, he used Shimousa as the right place to execute his agenda without so much opposition," Ritsuka said.

"I see...so what happened?"

"Well, we had to go and stop him. When we got there, he unleashed the Shimabara Hell, his reality marble. The air inside the reality marble is highly poisonous and it would burn to ash the lungs of anyone should they take a single breath without being careful enough. We thought we weren't going to survive in there, until..."

"Until gramps did something amazing! He swung his sword and somehow broke the reality marble itself!" Musashi said excitedly.

"Y-Yeah. Anways, after that happened, I woke up from my coma. And that's the whole story behind what happened and how Musashi mistook you for Sengo Muramasa, Shirou," Ritsuka said.

Everyone was silent from what Ritsuka just said.

"So...what are you saying...is that the reason why Musashi hugged Shirou is that-" Jaguar man said but was cut off from Ritsuka.

"Musashi mistook Shirou for gramps earlier and thought he was him. That's why she hugged him," Ritsuka said.

"I see...so that's what happened...why didn't you tell me about this earlier?" Shirou asked.

"Well...to be honest, I thought it was a coincidence that you looked like Sengo Muramasa...and I didn't expect Musashi to appear today either. Sorry."

"It's all right. Guess everything is fine now." "Although I need to talk to Muramasa the next time I see him..."

"Not yet. There's a few more things I need to do to clear this up," Musashi said as she faced to everyone else in the room. "I apologize for my earlier actions. It seems that I got Shirou confused with gramps and hugged him on impulse from seeing him. I'm sorry. Please forgive me," she said as she bowed in front of everyone.

For a moment, there was heavy silence in the room. Ritsuka was worried what was going to happen.

"Well...since you said it was an accident for getting Shirou confused with someone else...we're sorry for yelling at you," Arturia and her counterparts said.

"Yeah..." Ishtar, her rider counterpart, and Ereshkigal said.

"Sorry..." Parvati, Kama, BB and her sisters said.

"Sorry..." Illya, Kuro, Sitonai, and Miyu said.

"Sorry..." Astraea said.

"Well...people do make mistakes...guess I went a bit overboard here...sorry," Jaguar man said.

"Sorry..." Okita and Okita Alter said.

Musashi then turned to Shirou and said, "Emiya Shirou, I'm sorry for my earlier actions against you. It seems that I got you confused with gramps and thought it was you. Please forgive me," with a bow.

Shirou placed a hand on her shoulder and said, "I forgive you. After all, humans and servants can make mistakes, so you don't have to blame yourself for it," with a smile on his face.

Musashi then looked at Shirou and thought, "Wow, this person looks like Gramps, but he's a lot nicer! And a little bit cuter too! And he can actually cook good food! I wonder if they're related somehow..."

Ritsuka smiled as the whole situation was over. "Well then, glad that's taken care of."

"You said it senpai," Mashu said.

And then everyone resumed doing their daily stuff in the cafeteria. Shirou then began cooking seconds for the Arturias, Musashi, and Jaguar man, Ishtar and her rider self arguing with Astraea while Ereshkigal watches from the sidelines, Parvati chatting with Kama, BB and her sisters, Illya, Kuro, Sitonai, and Miyu spending time with Irisviel and Kiritsugu with EMIYA and EMIYA Alter watching, Okita and Okita Alter looking at their new swords, and Ritsuka and Mashu chatting with each other.

All and all, things were peaceful.

However, that peace would end.

Because as Shirou was about to leave, Musashi grabbed onto Shirou's arm, surprising everyone.

"Musashi?" Everyone thought.

"Hey Ritsuka, do you mind if I borrow Shirou-kun for a moment?

Everyone was surprised at what she just said. "SHIROU-KUN?! DID SHE JUST CALL HIM THAT?!"

"Well...why do you need him for?"

Musashi smiled. "I need him for a tour around Chaldea!"

"Well...Shirou, are you okay with that?"

"Well I don't mind but-"

"Great!" Musashi said as she started dragging him out of the cafeteria. "Come on Shirou-kun! I want to see more of Chaldea!" Soon, Musashi dragged him out of the cafeteria and headed towards the hallway.

For a moment, everyone was in shock of what just happened. Then, everyone in the cafeteria exploded and started running out of the cafeteria.

"GET HER!" the Arturias, Rins, Sakuras, Illyas, Miyu, Astraea, Jaguar-man, and Okitas yelled out.

"Oh boy, I think I just sent Shirou to hell..." Ritsuka said.

"You probably did senpai..." Mashu said.

"Great! Not only did he manage to get two girls, but three! This is going to be more interesting with that many girls around Shirou!" Irisviel exclaimed excitedly.

"Iri..." Kiritsugu said.

EMIYA and EMIYA Alter had one thought about this whole situation.

"Glad that's not me on that side."


Omake

Osakabehime was waking in Chaldea's hallway, trying to think of something to draw. "Argh! Why can't I think of something to draw?! Jeez, wish something inspiring to draw would come over to me..."

In an instant, her wish was granted.

Because as she was walking, she passed by Musashi dragging Shirou along being chased by the Arturias, Rins, Sakuras, Illyas, Miyu, Astraea, Jaguar-man, and Okitas.

As the commotion passed by her, a bunch of ideas for drawings instantly came inside her head.

"Wow. That was easy."

11/17/20 update: Changed a part of the chapter because I make a huge mistake there.