Prologue

Clock Tower

Rin Tohsaka the apprentice of the Wizard Marshal Kischur Zelretch Schweinorg, could only rub her forehead from reading the assignment sent by her teacher, sighing she placed the letter back on her table. "Vacation? More like work..." She mumbled under her breath and continued to prepare for her trip back to Japan.

After the whole ordeal with the Clock Tower and the numerous tasks given to her as the Wizard Marshal's apprentice. Rin thought that she'll finally be able catch a break and prepare herself a trip back home. oh how wrong she is when a letter is found on her table.

While ignoring the fact that a certain powerful entity had easily broken and entered into her apartment, Rin decides it'll be best to pack more than necessary and be prepared for whatever insane situation that will inevitably occur with her family.

Emiya Residence

"-And you'll arrive in an hour or so?" Sakura asked to confirm on the phone.

"Yes. see you then Sakura." Rin responded while hanging up the phone.

"Nee-san will arrive soon, and we'll be managing a Café!"

"Alright I'll go start din- wait we'll be managing a what now?" Shirou stumbled for a moment before resuming back to the kitchen.

"A Café? that seems fun! I can get Sella and Leysritt to help" Illya responded with enthusiasm while sitting in a seiza position lying on the table watching television.

Shirou sighed "I'm guessing we'll hear more about it when she arrives?" while preparing the ingredients.

Sakura hummed in response, starting up the stove and moving the cutting board.

"Welcome back Rin" Illya greeted her at the door.

"Good to see you too Illya, has dinner been served or about to be?"

"About to be, you can place your luggage at the back of the guest room"

After dropping her luggage in the room Rin stretched and sighed in relief "Ah~ it's good to be back." She made her way into the living room to join with the others as dinner was about to be served.

"Welcome back Nee-san/Tohsaka" both Sakura and Shirou moved out the kitchen to greeted her with nervous smiles. while Illya remain sitted while leaning on the table with a smug look on a face watching the scene unfolding in front of her.

"It-it's good to be back, I'm glad to see you all doing well and Shirou still looks dumb as ever" Rin stuttered in a panicked for a moment before nervously smiling.

Sakura let out a chuckle while Shirou opens and closes his mouth in an attempt to say something but decided to give up and let out a sigh.

"Dinner is ready, take a seat." Shirou ushered her to sit near the table with a shake of his head with a small smile on his face.

Shirou sat beside Illya while Sakura sat across to Shirou, followed by Rin sitting next to her.

"So how was your time at the clock tower?" Shirou asked offhandedly while moving a bowl of rice to Illya

"Tolerable... It would have been more bearable if that gorilla wasn't there to annoy me half of the time." Rin mumbled the last part while chewing a piece of salmon. While sakura patted her on her back.

"hmm? how about the transfer jewels you've been working on?" Illya asked with interest.

"I got the theory down for it, but I need materials to test which is more compatible for it." She groaned at the materials needed. "And as for the jewel batteries, after multiple experiments with lithium and incorporated them to some of my medium quality jewels, The size of it should be slightly bigger then my pendant, and by my estimate it should be able to store a decade worth of mana per jewel~. I just need Sakura to test and confirm it by fueling it." Rin beamed with excitement.

Sakura smiled at her older sister's antic. Deciding to relish in the moment before asking about the Café.

Which Illya ruins with a smug on her face "So About the Café..."

"Ughh, don't remind me" groaning which Sakura continues to pat her sister's back.

"It's from Zelretch isn't it?" Shirou asked which Rin replied with a grunt and a nod.

"Since it's Zelretch..." Rin takes out the letter. "The Café's name is Abnenerbe, it's conveniently located a few blocks away from the shopping district." Shirou opens his mouth to ask a question. "No, It doesn't state how and why it's there." Only to close when the question was answered, while Rin continues on with the letter. "The customers consists of people knows or knows not of the moonlit world. Additionally they may be from parallel or different universes entirely. As for payment, it's ultimately decided by me, be it gems or rare materials. Or It can be converted to yen using a mystic code." Rin looks up to everyone "There won't be a language barrier since everything spoken or written will be translated inside the Café itself" And then back to the letter. "Payment is ultimately decided by me, be it gems or rare materials. Getting jewels as payment.. woah..." She puts away the letter and mumbles the last part in wonder.

"Did it mention anything about the ingredients being provided or do it have to provide it ourselves?" Sakura asked with interest.

"No... looks like I have to check out it first." Rin sighed lying her face on the table only to pause a moment later "Wait... ourselves?"

"Isn't it obvious we'll be helping with the Café? Nee-san." Sakura replied with a smile.

"Of course, Toshaka is family, so it's natural that we'll be helping each other. There's nothing less or special to it." Shirou says with a straight face that's turning into a small smile.

"I'll get Sella and Leysritt to help as well, this will be fun~" Illya hummed in amusement.

"I can't believe I forgot that you'll decide help whether if I asked or not." Rin sighed with a gentle smile on her face. "I'm surprised you're taking this well, especially Shirou. by the fact we're going to now manage a Café with functions using second magic."

"We've been through the holy grail war. I doubt there will be anything worse than that, besides we have everyone together, so if there were any problems can deal with it together." Sakura replied with a smile.

"I am definitely bother by this, but it can't be helped, so if you need anything Tohsaka just give me a heads up." Shirou sighs while stretching.

"What's the matter Rin? Is such a small task too difficult for you?" Illya taunted with a smug looking grin.

Rin's smile changes to that of a dangerous one. Before she could say anything, Shirou stood up and tries to placate Rin from escalating the squabble.

"Get some rest for now Tohsaka, you'll need it for tomorrow." Shirou moved to pick up the empty plates to the sink, Sakura followed along to help, While Illya walks to the telephone and begins to call the Einzberns maids for the plans tomorrow.

The Next Day...

They stepped out the Emiya Household, There sits a car seemingly waiting for them. Rin was about to ask about it only for Illya to answer the question before she even ask "We'll be using my car Rin, and I'll be the one driving." She was shocked mouth wide open for a few seconds at the image of her driving. stuck between rethinking her world view or to just burst out laughing at how ridiculous it is. After few seconds of holding her laughter, she calmed herself and was about to question if they knew, only to receive understanding looks from both Shirou and Sakura. She and the others began to board and drive to the Café.

After arriving outside the Abnenerbe Café, Everyone began to exit out of the car and inspect the Café, while the Einzbern maids stayed and droved off to the parking area.

Upon inspection of the Café, it looks just like any old standard Café from the from the early to mid 19th century with overgrown plants on red brick exterior to even the roof, it also has has a boundary field. Which both Sakura and Shirou pointed out the aura of the field feels pleasantly welcoming. While Rin studies how strong and well made the field is, And Illya decided to tag along with whatever Shirou is doing.

Once they were satisfied inspecting the Café, what felt like half an hour. They began moving inside to once again inspect the Café's interior for another or so 30 minutes.

Suprisingly, the interior is much more well kept and maintained despite the otherwise state of the Café exterior, it looks similar to that of an old bar with a few mystic codes hanging on the wall. With tables and chairs filling the entire left side of the Café, on the top right is where the Bar and cashier is located where the counter stretches and covers the right half of the Café, while the other half is where the kitchen area is located. A wide-screen television hangs on top of the counter, facing to where the customers will be seated, as well as what seems to be a meter tall metallic spider with light blue skin that glows with charcoal black scales acting as armor as it's skin, with a strange looking UFO on top of it, located at the corner of the Café seemingly sleeping.

Shirou noted the look on Rin's expression of pure dread and fear when she first gaze upon it. Almost deciding to act, only to be cut off by Rin's action of facing away and regain her posture and proceeds to walks away to the kitchen area acting as if nothing was wrong. mumbling to herself "Nope. Nope. Nope. Not dealing with that. No Way." Shirou could only sigh and proceed to check out the rest of the Café.

After figuring out where the ingredients were located and confirming what the menu should be limited to with the kind ingredients available. They also found the Café's uniform that they'll be wearing, thus they began deciding what roles they'll be assign to. Only for it to come down to whatever demand needs to be met and what kind of dish or drink was ordered which they'll assign themselves to it. So they agreed upon mainly service will be handled by the Einzbern maids and Sakura, while Illya or Rin manage the cash register and anyone but mainly Shirou cooks.

Once they were done with deciding on management and roles, they exited out of the Café and witnessed the sun setting, everyone proceeded to board the car and drive straight home.

The following day...

The opening of the Café is just a few minutes away, just the final preparation left to be complete.

Only for telephone by the bar counter to start ringing.

Rin being the nearest to the telephone proceeds to answer the strange call while the other finish their other tasks. "Hello, This is-."

Only to be interrupted by caller saying "It's about to begin."

Rin confused, responded with "It's about to begin?" only for the caller to end the call.

She can only sigh "Why do I feel like I'm going to get multiple migraines after everything is said and done with this..." mumbled under her breath over the totally not ominous call.