"Whoa! This place is amazing!" Mabel, Yukio and Dipper looked around at the Mystery Fair in awe.

"It is, Mabel. The cheapest fair money can rent. I spared every expense." Stan said, admiring his cheap work.

In the distance, they could hear screaming. As it got louder, they saw Rin crash to the ground in a broken sky tram.

"Ore think the sky tram is broken." He said, eyes wide with fear. "And most of my bones."

Stan laughed. "This guy. Alright, alright. I got a job for you lot." He pulled out some papers with A+ on them. "I printed up a bunch of fake safety inspection certificates. Go slap one on anything that looks like a lawsuit."

"Stan, I'm quite sure that's not legal." Dipper swore he would learn how to appear out of nowhere. Shiro seemed to get a kick out of it every time he managed to startle Stan.

"Don't look at me like that, priest! When there's no cops around, anything's legal!" Stan said, before walking over to Soos.

"So, guys, what do you wanna do first?"

Rin shrugged. "No sky tram."

Mabel giggled. "Yeah. You okay?"

"Well, ore wa not bleeding, crying, or in pain so good."

"Then let's go put up fake safety inspection certificates!" Mabel yelled.

"You probably shouldn't have yelled that." Yukio said.

"I probably shouldn't have yelled that!"

Both sets of twins had fun. That is until Dipper, in an attempt to win Wendy a plushie from an attraction, accidentally gave her a black eye in the toss ball game. That caused a teen named Robbie to try to woo her. As he moped around, he noticed Yukio sneaking away with his father. Dipper turned to his sister at once.

"Don't you think Yukio and Shiro are acting strange?" the boy twin asked.

Mabel nodded. "I don't know why yet, but whatever it is, I'll be there with you, Dippin' Sauce. Whatever happens, I'll be right here, supporting you every step of the- OH MY GOSH A PIG!"

"Mabel please! We'll get back soon and you can have your pig!" Dipper pleaded. "Are you coming, Rin?"

"Ore...wanted to go with Ma-chan to the Tunnel of Love and Corndogs..." Rin trailed off.

"But understand, Rin, we have to make Yukio know that it's okay to have fun in summer! If he doesn't have fun he'll never have a girlfriend! And he wouldn't have children! And then, he'll be a horrible, grumpy brother! And then, he'll be a horrible, grumpy uncle!" Mabel walked up to Rin, grabbed his shoulders and shook him. "I WILL NOT LET OUR KIDS SUFFER FROM UNCLE YUKIO!"

Rin pushed her away and brushed imaginary dirt off his shoulders. "I know, I know. Gomenasai, I messed- masu, what did you say?"

"What do you mean?"

"You said OUR kids."

Mabel's eyes widened. "Oh... did I? Well, I didn't... necessarily mean..."

"Well, yeah it's just..."

"I... wasn't trying to imply..."

"It sounded like..."

"Not that I don't-"

"Yeah, I mean-"

"-want to! I just..."

"-that's fine! It's just..."

"Awkward." Mabel finally said. After a few minutes of silence, she spoke up again. "ByeRinseeyalater!"

Rin watched the twins go. He had no desire of going to see what his family members were up to -it wasn't uncommon that Yukio pestered Shiro with questions about his schoolwork. Rin figured his little brother was already doing work, as to not fall behind in school.

The remaining half of the Okumura twins had discovered a manga store, something he had been absolutely sure it would be impossible to find. It even had volumes that hadn't hit the market yet!

"How did you get all these, Mr-?"

"Mephisto Pheles, at your service."

Rin finally looked up from the manga he had been reading and blinked at the man who looked like he had climbed out of the manga that lined the store's shelves. Rin looked at the manga once more before wondering if that is what otakus become.

"...Konnichiwa, Pheles-san." the boy greeted.

"Well aren't you polite. Tell me little one, what brings you to my shop?" The odd man asked as he leaned against the store counter.

Rin gestured to the dozens of manga. "This is the only manga store here. I wanted to take a look!"

"Ah, you poor soul. Deprived of the worlds greatest joy in these distant lands. Come, let me show you some of the better ones." Mephisto said while walking further into the store. As Rin followed, he notice that there were many more shelves of manga than he had expected.

"These are all yours? How much for one?" Rin asked. Maybe he could get Stan to give him some of his money in advance. He really wanted at least one manga.

"Hmm... well that depends on the series. As I said before these are what I consider the best, what do you think they are worth?" The shop owner asked with a smirk.

"Far more than what I have." Rin grumbled.

Mephisto's eyes glinted. "What a wise reply. After all, I could have challenged any price you gave. So how about this, I'll allow you to rent whichever manga you wish in exchange for a favor."

The black-haired boy perked up. "What favor?"

"You see, there's an oddly dressed man walking around town today. I want you to find him and bring him to the shop, it's important that you bring him to me because he stole something of mine earlier." Putting on a troubled air he lets out a sigh, "Normally I would go and track him down myself, but if I leave my shop I might be stolen from again! You see what I mean, right?"

"Sure thing, Pheles-san! I'll be back in no time!" no point in wasting an opportunity to get free manga.

As they followed the father and son, Mabel wondered where were they going. As far as they knew, they had just opened a door and gone through it. The Pines twins shared a brief glance before tearing down the hall to catch the door before it closed fully.

They didn't expect to be in a village in the middle of a forest. Both twins gaped.

"What in the world..?"

As they walked, quickly to avoid losing either Yukio nor Shiro, they were suddenly cornered by an uniformed man. "Dare desu ka?"

So this confirmed it. They had somehow traveled through a door that landed them in Japan.

Dipper almost panicked, before remembering his lessons. He silently thanked Yukio. "Boku no namae wa Pines Dipper desu. Kanojo no namae wa Pines Mabel desu. Bokura wa Amerika-jin desu."

"Fujimoto Shiro wa doko ni imasu ka?" Mabel had, at least, a firm grasp of basic Japanese.

The man nodded. "Kochira, douzo."

Obediently, they followed the man.

"Do you hear that..?"

Mabel nodded at her little brother's question. The roaring was impossible to ignore.

Mabel and Dipper Pines had faced a few supernatural things in the past few days, but they didn't expect to see the man they knew as a normal priest in front of what appeared to be a monster, two-tailed with horns on its head.

Dipper gaped. Mabel smiled. "Kitty!"

"Dipper-kun?! Mabel-chan?!" A surprised squeak sounded behind them, before a hand clamped down on each of their shoulders and forced them to turn around, revealing a surprised and... scared? Yukio.

Rin raced away from the store, wondering how odd those clothes must be if the eccentric shop owner referred them as such. It wasn't long before Rin saw he must have meant that bald guy with a toolbelt.

"Hey, you!" Rin yelled to him. "Toolbelt!"

"Heh?" He said in surprise.

"Don't 'heh' me. I've seen you before."

"AAAAGH!" He yelled. "My position has been COMPROMISED! Assuming stealth mode!" He pressed buttons on his watch, making his suit change colors and backgrounds. "Color match! Initiating color match! Come on, dang it!" He finally took out a screwdriver to fix it.

Rin gasped. "Subarashī! Are you from the future or something?"

"Uh, NO!" The man yelled. "Who told you that?! MEMORY WIPE!"

He threw a wipe at Rin's face. He held it and stared for a moment. "This is a baby wipe."

The man sighed. "All right, you've cornered me. I'm... a time traveler."

"A time traveler? Why would you do something like that? Do they not have science fiction in the future?" Rin asked with a tilt of his head. "And where's your time machine? Wouldn't it be hard to hide depending on the year?" He looked around and peered behind the disappointed traveler.

"Of course I have a time machine. This is kinda how it works. You know, this is sensitive extremely complicated time equipment." He then showed him... a tape measure.

"It looks like a tape measure."

"You shut your time-mouth!" He yelled. "Anyways! This is how I travel through time."

"How do I know you are telling the truth about that?"

The man sighed. "Fine, I'll show you how it works." He pulled the tape out a few inches and then taped on the button at the top, disappearing from the timeline. Seconds later he reappeared in old fashioned clothes. "Guess where I was?!" He said confidently.

"Whoa!"

"That's right! 15 years ago there was a costume shop right here! One second." He disappeared and reappeared in his normal suit. A part on shoulder was on fire. "Ah! Aw, heck! Pat! Pat down!" He said, patting the fire down.

"So, who are you again?" Rin asked.

"Blendin Blandin," He said, holding out a card. "Time Anomaly Removal Crew year twenty-snyeventy-twelve. My mission is to stop a series of time anomalies that are supposed to happen at this very location! But-but I don't see any anomalies! I don't know if it's some kind of paradox, or I'm just really tired..." He sat down.

"Oh... well, hey! I know a place where you can rest and relax a bit!" Rin said with a grin on his face.

"Hmm... I don't know."

"Oh come on! You look exhausted. How are you going to stop a time anomaly if you can't even focus?"

Blendin got up and smiled. "You know what? What the heck! I'm worth it!"

"There ya go! Come on, it's this way!" Rin ran back toward Mephisto's shop, turning around every few feet to make sure the time traveler was still following him. Giggling to himself, he stopped in front of the store's entrance while Blendin caught up and caught his breath. As the two walked in Rin sucked in a breath, "Pheles-san! I found him! Or at least I think he's the one you were talking about..." Mephisto peeked his head out from behind a stack of shelves. "How do you know a time-traveler anyway?"

"Oh, you meet all kinds of people in this line of work kid. People like him? They're just a headache." Slowly the strangely dressed male prowled out from the rows of manga to stand in front of them. "Now why don't you pick what you want to read while the two of us have a nice. little. talk." He dismissed while glaring at Blendin.

Rin looked for a manga that interested him, but also tried to listen to the adults' conversation.

Once he had made sure Rin was out of sight Mephisto turned on the confused time traveler. "Now then, I will give you ten seconds to explain why you used my domain to come here, and it had better be good." Here he grabbed hold of Blendin's shoulder and towers over him at his full height. "Because if I think you are lying or that you have been playing with time? I'll show you exactly what happens in between the milliseconds of the universe."

Blendin whimpered as his knees threatened to buckle beneath him, "I-I am an agent sent to this day to stop a time anomaly from occurring! I h-haven't found a-anything yet, but I'm s-sure I have the right day!" He stuttered out hoping to placate the scary store owner while still seeming like a person of authority.

In Rin's opinion, it didn't work.

Mephisto's frown turned from silent rage to tired disappointment as he held out his free hand. "W-what?" Blendin stuttered once more, "What do you want?"
"Your device. Whatever it is that allowed you to come to this timeline." The hand on the traveler's shoulder tightened threateningly.

"But if I don't have that I won't be able to go back to twenty-snyeventy-twelve!" Blendin panicked, attempting to escape Mephisto's grip.

"That's exactly the idea."

Both Blendin's and Rin's eyes widened at his statement. "If you are willing to tear holes in my domain without my permission, you are quite capable of suffering the consequences. I could do far worse than letting you live outside of your intended timeline if you'd rather have a different punishment. Who knows, maybe if you amuse me I'll send you back to your present someday." Mephisto shoved the traveler down a nearby isle, away from line of sight outside, and stalked towards his shaking figure. "This is your last chance, give me your device."

Blendin shakily reached down to his belt while looking around for something, Anything that could distract the person in front of him, and his eyes landed on Rin. Before he could doubt his decision he tossed the time measure to the child. Unfortunately, the tape had snagged on a shelf and as Rin was catching it, the tape retracted. "No!" Mephisto hissed as the child disappeared from right in front of them.

Mephisto glared at where the little boy had been before bringing a hand up to his face to rub the bridge of his nose. "That... was foolish. No. Foolish is too kind a word." Mephisto glared at Blendin with slitted pupils, "You are going to suffer for giving me yet another headache."

Rin appeared in front of a large dinosaur. He screamed and frantically pushed a button on the time machine as the Dino tried to eat him.

He reappeared in the future. Everything was in ruins and there were two moons.

"Run! Run!"

"IT'S COMING!"

A giant baby with an hourglass on its forehead destroyed a nearby building with its laser eyes, laughing evilly.

"This future seems neat!" Rin smiled, before pressing random buttons.

"I'VE SEEN IT! I'VE SEEN IT AGAIN!"

"But enough about me, behold: ME!"

Rin ran, ignoring he had lost a shoe.

The Gnomes cornered his past self.

He saw Dipper and Yukio training with the Manotaurs.

He was standing in Mephisto's manga shop. He looked around and saw the shop owner had picked up Blendin by his collar.

"I'm back! And I got the time-travel thingy!" Rin quickly said.

Mephisto's head jerked around to look at Rin with painful speed before a grin stretched across his face. "Good job, Rin!" He dropped Blendin and walked over to the child. "If you give it to me I'll lend you a volume of manga each month. Even if the shop disappears."

"Even if- what?"

"Well, you didn't see me build this shop right? It just showed up on the street. Thus, it stands to reason that it might disappear and come back from time to time." Mephisto's grin was doing its best to mimic a Cheshire Cat.

Rin handed him the device. "How will you send me the manga? You don't know where ore live...matsu, I never told you my name."

Mephisto blinked and rubbed the bridge of his nose again. "This is why I hate headaches, I get ahead of myself. Both questions are solved with a single answer. Your dad, Shiro Fujimoto and I are friends."

"You're the friend that paid for our vacation?"

"Exactly right. Now then, why don't you go pick out what manga you want to borrow first?"

Two strange men suddenly appeared. Their names read Lolph and Dundgren.

"Blendin Blandin..." Said Lolph.

"AAAAGH! The Time Paradox Avoidment Enforcement Squadron!" Blendin yelled.

"That's right, and our phones have been ringing off the hook!" Said Dundgren.

"You're under arrest for violation of the Time Traveler's Code of Conduct." Lolph handcuffed Blendin and led him away. Mephisto approached them. Rin got his manga and ran out.

"Listen, you...you really loved humans, didn't you?" Shiro was calm, too calm, and Yukio couldn't understand how could he. "So you were just sad about being forgotten. That's all, right?" he extended a hand towards the humongous cat. "Let's make up. Look, I have some fine silver vine sake!" he added.

"So he's trying to get the kitty drunk?" Mabel asked Yukio.

"Um, well, Tou-san says it can bring people closer together as friends." Yukio hesitantly replied. "Anyways, what are you two doing here? How are you here?"

"We followed you." Mabel bluntly said.

"How come we're in Japan all of a sudden? And what's with the giant cat?" Dipper asked, trying to remember if he saw something like that in his Journal.

"Wait, you can see them?"

"How can we not see a giant cat?"

"Because that giant cat is a demon. He's nothing like the creatures that run around Gravity Falls." Yukio said seriously.

"Demon…?" Dipper repeated the word with a tremor in his voice. Yukio nodded solemnly.

"This world consists of two dimensions, separated and facing each other like a mirror. There is our world, the material world. Assiah. And then there is the world of nothingness and demons which is Gehenna. These two worlds are never supposed to meet and travel between them is apparently impossible. But demons possess material things and are able to reside in Assiah."

"So a demon possessed the cat?" Mabel asked

"No, this is a Cat Sídhe. He was a demon acting as a protective deity for local silkworm farmers. In exchange for protecting the silkworms from being killed by mice and other disasters, he received offerings of food, as well as festivals in his name. However, as times changed and silk cultivation became outdated, people stopped worshiping him. Eventually, they even bulldozed his shrine and develop the land it once stood on. That's why he's so angry." Yukio explained.

"That's so sad!" Mabel cried as she turned and ran towards the group of priests and Cat Sidhe. Dipper and Yukio reached out but couldn't get a grip on her sweater fast enough.

Focused as he was in calming the demonic cat, Shiro didn't notice anything wrong until he saw a shock of brown hair speed past him to hug the demon. "Eh?!"

"I'm so sorry people forgot about you, and after you had helped them for so long!" Mabel clung to the animal with tears budding in her eyes.

Slowly, the Cat Sidhe sat down and brought its free forepaw around the little girl's back, and lowered his head. "What are you doing?!" Dipper shouted as he tried to make his way to his sister, only to be stopped by Shiro's hand on his shoulder and the tense focus portrayed on the elder's face.

Suddenly, Mabel let out a series of giggles as the cat began purring and shrunk down to a more manageable size for the human girl. "You and I will be friends, and we'll make sure you aren't lonely anymore. Right Dipper? Yukio?" At this she stared pleadingly at the two boys with the queen of all puppy dog faces.

Shiro stared in sheer disbelief, before remembering himself and turning to his team. "Pines Mabel, of the American branch. Her methods as a Tamer are a little...unorthodox, but as you can see, they work." Shiro explained to the others in Japanese.

It was only as they made their way back that Shiro addressed the elephant in the room, or in this case we should say cat. "Dipper, Mabel, do you know what that is?"

Both twins nodded. "A Cat Sidhe, Yukio told us." Dipper said.

"Then you are aware that not only should he be invisible to you, he also isn't a normal house cat you can just bring with you?"

"He seems pretty happy to be with me. Right Blackie?" Mabel asked the cat with a smile. Yukio raised an eyebrow at the naming as the cat purred.

Mentally going over what happened today so he could relate it to his friends, Rin walked around the fair, manga in hand. He looked at a flyer and gasped. Rin ran frantically, bumping and pushing many people as he followed the flyer that invited people to win a pig. He remembered Mabel had wanted one.

The pig carnie yelled, "If'n you can guess the critter's weight, you can take the critter home!"

Rin looked through all the pigs. Too fat, too skinny, too dirty, too... weird looking. He smiled as he spotted the perfect pig.

"Wurble."

Rin gasped. This was definitely the one his friend would want. "He said Mabel! Either that or doorbell." he stared at the pig. "Did you say Mabel or doorbell?"

"Wurble."

Rin then turned to the pig carnie. "Oji-san, I must have that pig!"

"Ah, old 15-poundy!" He said, looking at the pig. "So, how much you guessin' he weighs?"

"Um, 15 pounds?"

"Are you some sort of wizard? Well, here's your pig."

Rin's grin widened as he hugged the animal. He hoped Mabel liked her new pet. "You'll like your new home. Right Yotan?"

As they finally met up with Stan and Soos, about the last thing Yukio and Shiro expected was that Mabel hadn't been the only one to have aquired a pet.

"Finally! Ma-kun! Ma-chan! Look what I have!" Rin ran up to them, a pig in tow. "I saw you looking at it earlier, Ma-chan, so I got it for you."

Mabel let Blackie hop to the ground, where it went to Rin. "We did it. We went to see what Yukio and Shiro did AND you got my pig! I'm so happy right now!" Mabel said, pulling Rin into another hug. "I could KISS you!"

"Wait, what?"

She kissed him on the cheek with a, "Mwah! Aw, you're blushing! It's so cute!"

"Stop that!" He said, blushing more. The cat mewed. "See, Kuro agrees with me!"

Mabel looked at the pig. "I'm gonna name him Waddles, because he waddles."

Both Yukio and Dipper raised his eyebrows at their respective siblings.

Rin's blush slowly disappeared. "I met a time-traveler today!"

"Wait, what?"

When the Okumura family was about to go to the hotel for the night, the Pines twins managed to corner Shiro. They had had a lengthy discussion and decided to ask Shiro before doing anything.

Shiro stared at the two twins. When Mabel spoke, her voice was quiet and hesitant, but she pressed on. "Rin can't see them, right? Why are you keeping him in the dark? Shouldn't you…?" The word explain was barely able to leave her lips. Mabel fell silent as Shiro slowly stalked forward.

"Mabel-chan."

Shiro's voice was tense as he walked towards the door. "You don't understand the situation as well as you think you do. You may be his friend, but I am his father. I advise that you do not tell me how I should raise my son. I'll tell him in my own time."

Mabel fell silent, but Dipper picked up from where she left off.

"…I…may not know what's going on here…" he muttered, his voice gaining strength, "but I do know this…! You're supposed to be family, aren't you?!" He met Shiro's eyes, and Dipper wasn't sure what type of expression he was making this time, but his head felt as full as his heart right now, tight with bitterness and a desire to protect his friend.

Shiro seemed to be hiding something...something big. Something bad.

"Rin looks up to you… So whatever you're hiding, no matter what reason it is, the longer you keep things secret, the worse it'll be when he finds out."

Shiro's expression softened into one of understanding… but it was the understanding an adult would give a child. It was that expression of pity and longing. He shook his head lightly. "He's not ready. And neither are you two." His voice was calmer now. "You may think that the world is divided into lies and truths but rarely is it ever so black and white. I fear you'll come to understand that sooner than you might think."

There was an air of finality in the priest's voice as he turned and walked away.

"If you want to help Rin," he spoke without looking back, "stay with him. Starting now."

Yeah, I missed a lot of episodes, but I tried to show what could've changed. For example, Yukio is all about getting stronger, so he'd definitely train with Dipper and the Manotaurs.

A huge thanks to KHR-Yunalesca for helping me with writing this chapter!

Gomenasai: Sorry

Matsu: Wait

Dare desu ka: Who are you?

Boku no namae wa Pines Dipper desu. Kanojo no namae wa Pines Mabel desu. Bokura wa Amerika-jin desu.: My name is Dipper Pines. Her name is Mabel Pines. We're American.

Fujimoto Shiro wa doko ni imasu ka?: Where is Shiro Fujimoto?

Kochira, douzo: This way, please.

Yotan: Onomatopoeia of 'waddling'