Recap:

Three years ago, Star Butterfly, the princess of the Kingdom of Mewni returned to her home dimension after her two year stay in the Earth Dimension, leaving Marco who never got the chance to tell her how he really felt.

After a while, Marco dated other girls but Star never left his head. One day, a stranger dropped a scroll which the art of demonic summoning was inscribed. Marco's desperation led him to try the dark art—but not entirely sure if it works.

But soon as he said the incantation, a demon appeared, offering him a deal to get Star back to him. Not thinking what the consequences might be or what would be the demon's benefit, Marco acts selfishly and seals the deal.

But after the deal was sealed, he collapses in tiredness while the demon leaves.

Marco's not sure what he has done, but for sure, he knows Star will be with her when he wakes up…

And another thing: Marco got the demon's name: Bill Cipher…

Gravity Falls belongs to Alex Hirsch

Star vs. the Forces of Evil belongs to Daron Nefcy

CHAPTER ONE:

Welcome Back to Gravity Falls

Dipper's POV:

JUNE 12, 2015

1:45 PM

"I'm so excited!" Mabel, Dipper's twin sister giggled as the bus passed by the sign: Welcome to Gravity Falls which marks the entrance of the town the two of them called their home away from home. "Dipper, we're here!"

Dipper Pines, now fifteen years old smiled at his hyperactive twin and laughed. As usual, Dipper wore his red flannel buttoned shirt paired with black jeans and blue Chuck Taylors. His brown hair is tucked in a green cap with the print:

THE MYSTERY GUY

Mabel, on the other hand, wore a red sweater with a smiley print she knit herself and a plain white t-shirt underneath. She wore a blue skirt paired with her own red Chuck Taylors. She also fixed a blue hairband on her now short hair.

Before the end of the school year, Candy Chiu, a friend of Mabel sent a photo of herself with Grenda, another friend of hers. In the photo, Grenda looked the same big and scary girl but her face is somehow less manly unlike their first summer in Gravity Falls. But Candy's change is what shocked both Mabel and Dipper: her long dark hair was now trimmed into a pixie cut with streaks of purple dye. Even her choice of clothing turned different as well.

Mabel teased Dipper due to his reaction to Candy's new appearance. But before Dipper could think about his choice of words, he stupidly said his sister's friend looked 'kinda hot'.

With her decision, their parents' and Dipper's confusion and reluctant approval, Mabel got herself a haircut. Dipper also jokingly suggested to have her braces removed but Mabel countered that: "If I do that, then the loving Mabel everyone knew would be lost forever."

Now inside the bus, the two of them looked alike. Mabel told Dipper to wear something that she could pair up with so when they arrive in Gravity Falls, people would instantly know it's the Mystery Twins.

They are fraternal twins to be exact but if you compare their faces closely, they would look exactly the same.

"Yeah, I know the feeling, sis. I'm also excited to see everyone after another year." Dipper said. "Sure, Grunkle Stan and Great Uncle Ford won't be around but at least Soos and Wendy would be there to spend the summer with us."

"Yeah, I miss Grunkle Stan and Grunkle Ford." Mabel said wistfully. The original Pines Twins, their great uncles Stanley and Stanford Pines only come home in Gravity Falls once in two years to take a break from their adventures and they were around last summer. "Too bad they won't be with us this summer. But hey, we can still talk to them via internet, right?"

"Yep," Dipper nodded. "But I'm so excited to have the summer with Wendy again."

Dipper glanced at his sister who is mischievously smiling. Dipper usually hates it because most of her mischievous plans and schemes are for him. It runs in the family, she's basically their great uncle Stanley Pines' reincarnation.

And from Dipper's experience, Mabel and Stan usually tag-teams in making fun of him.

"What?"

"Oh, I don't know… since you're no longer a little kid…" Mabel winked. "I was just wondering if you're still interested in dating Wendy. You're basically in the same height!"

Dipper felt his face burn red.

"N-no, I'm n-not interested w-with that idea anymore!" Dipper told his twin who is trying hard not to laugh.

"Oh, really?" Mabel chuckled. "But the last time I checked, she was the only thing in your head when we spent our first summer here…"

"Well, in our second summer, I wasn't into her anymore." Dipper said in defense.

"Right… but maybe it's because Wendy wasn't in Gravity Falls during that summer! Admit it, Dipper! You're still into her!" Mabel teasingly punched Dipper's shoulder.

"B-but on the third summer—"

"She only stayed for a couple of weeks before going to a family vacation in Europe!" Mabel countered. "You were so down from those two summers that when Soos sent a letter saying Wendy will be spending the summer in Gravity Falls, you suddenly flared to life! I even caught your epic back-flip fail when you celebrated on camera!

"You what?" Dipper looked at his twin. "Fine I admit I'm excited to spend a summer with her again but as I said, I'm not… in love with her anymore…

Ugh, besides, she might be dating a guy from her school in Portland. She's beautiful; someone or two in her school should be interested in dating her. I mean, why wouldn't she be dating someone? I mean, she's very awesome as well! Totally badass and—okay I'm crossing over the line but you know what I'm saying… wait…"

Dipper stopped talking.

"Mabel, are you recording this?"

"Ha! I love it when your voice cracks even now you're fifteen!" Mabel shows her a recorder: the same recorder Stan used three summers ago when Dipper cloned himself. "And wait 'til Wendy hears this one!"

"Mabel—"

"I'm just kidding, bro-bro!" Mabel laughed. She clicked 'erase' and smiled. "Boop, and it's gone!"

"Ugh…" Dipper groaned and looked away from his sister. She's fifteen but she's still the same silly and annoying Mabel.

"But be honest with me Dipper," Mabel tapped Dipper's shoulder. "Are you dating someone without me knowing who the girl is?"

That caught Dipper's attention.

"Uh… no, no I'm not dating anyone. Why would you say that?" He protested. "Listen, if I'm dating someone, I promise I'll give you a heads up, how's that?"

Mabel looked at Dipper and beamed. "Okay!"

Dipper smiled at his jumpy twin.

"Too bad, Waddles isn't here," Mabel said sadly. "He would enjoy coming back here in Gravity Falls."

"Well at least he's with Uncle Felix in the family farm," Dipper assured his twin. "Waddles is happy there."

"You really think so?" Mabel's face lit up.

"I know so, sis." Dipper smiled.

The bus stopped.

"We've arrived in the station," The bus driver announced. "Welcome back to Gravity Falls, Pines Twins."

...

"Hey nerds, over here!"

"Wendy!" Mabel exclaimed.

As the twins got off the bus, their red headed friend, Wendy Corduroy met with them with her usual smirk.

"Hey, Wendy," Dipper gulped. "So… how's it been?"

Dipper could see Mabel smiling in his awkwardness. Like his sister, Dipper himself didn't really change: he's still the same awkward and sweaty boy with a jumpy twin sister.

Wendy looked at Dipper and chuckled.

"It's funny you're slight taller than me now." She said. "I still remember the days when you used to look up to me—I mean in a literal sense, of course."

"Y-yeah…" Dipper scratched the back of his head. "I guess I also miss the days when you were like a tower to me."

Wendy laughed.

"Yeah, well, I'm still cooler though." She added making the two of them laugh.

You're the coolest person I know… Dipper's mind whispered.

He looked at her and all he knew is that she looked the same girl he met three summers ago. She wore a plain green t-shirt paired with blue jeans and black sneakers. Her copper red hair—though it seems shorter now since the last time Dipper saw her—is tied in a tail making the freckles on her face visible. Her green eyes made Dipper's memories of going to the forests of Gravity Falls become sharper and clearer.

Man, I really missed her, now did I?

"So…" Wendy smiled awkwardly.

"Uh…" Dipper laughs awkwardly. Great, Dipstick… you've infected Wendy with your awkwardness.

Now Dipper could see Mabel making a face.

"Nice flannel shirt, by the way…" Wendy broke the awkward moment. "And the footwear… I gotta say, Dipper, your wardrobe has improved."

"Uh… thanks?"

An awkward silence followed but was quickly broken by Mabel.

"Um, so Wendy," She coughed. "Shouldn't we head out for the Mystery Shack?"

"Right," Wendy turned to Mabel and smirked. "Let's use my car."

"Your car?" Both twins said in unison.

"Yep."

"Uh, you got yourself a driver's license… right?" Dipper asked. "I mean, the last time I saw you drive was when we got chased by Gideon and his minions through the bubbles of madness during Weirdmageddon, and it was a bumpy experience—a bumpy ride to be exact."

"Well, don't worry Dipper," Wendy assured. "I have my license and my own car."

Mabel scanned the area and gasped.

"What's wrong?" Dipper asked his sister.

Mabel grabbed Dipper's face and forced him to look at the object that surprised her. It surprised Dipper as well.

It was a red burgundy car with a white hood. It also has a white landau roof and a yellow license plate. Even with the distance, Dipper knew the letters printed: STNLYMBL.

"The Stanmobile?" Dipper rubbed his eyes. "Mabel, pinch me."

Mabel did so.

"Ow."

"You got Grunkle Stan's car?" Mabel looked at Wendy in disbelief. "You got his car to be yours?"

"Well, since Stan left for an adventure with Ford, he said he won't be using the Stanmobile for a while and he needed someone to take care of it.

He asked Soos, who agreed to do so but last year, Stan didn't like the fact that it just sat in a garage unused. I volunteered to look after it and use it as well. He thought it was a good idea and here it is."

"You talked to Grunkle Stan last year?" Mabel asked curiously.

"Well, it was an online call." Wendy explained. "I was visiting Soos and Melody in the Shack, just in time for the video chat. Come on, let's get going."

...

"By the way, how's Soos and Melody?" Mabel asked during the ride.

"Oh, Soos and the Mystery Shack are number one among all Tourist Traps in the whole state." Wendy responded without taking her eyes off the road. She seems serious enough to calm Dipper's thoughts of dying in a car crash. "Running the Mystery Shack really did him the best. Melody on the other hand went to visit her parents in Portland before the wedding—"

"Wait, what?" Mabel leaned forward. "Soos and Melody are engaged? Since when?"

"Oh, I guess you guys didn't know, but I think Soos proposed last Christmas." Wendy laughed weakly. "I only knew that they're already engaged when I talked to Stan online. Stan and Ford gave them their blessing and apologies that they won't be around for the big event. And I guess Soos wanted to tell you himself as a surprise but… eh, it's ruined. Way to go, Corduroy. Way to go."

"Oh my gosh! Soos and Melody are getting married!" Mabel grabbed Dipper's arms much to his protest and shook him back and forth. "I'm so happy for them!"

Mabel got to know Melody sometime during their final days in their first summer in Gravity Falls. They got into small laughs until they became close friends. Now, she's engaged with Soos, one of Mabel's closest friends. Two of her friends are in love. No wonder why she's hyped more than usual.

"Mabel, I'm also happy, now stop shaking, me!" Dipper snapped. Mabel let go but her jumpy expression wasn't erased. "So Wendy, when is the wedding to be exact?"

"I think it would be by the end of July which is next month." Wendy said.

The twins sat in the back seats leaving Wendy alone in front. Dipper said he'd rather sit in the back to remember the memories he spent in this exact vehicle: when Stan told Dipper and Mabel to put on blindfolds and get in the car for a family fun day in the Gravity Falls Lake, the time Stan got themselves stuck in the middle of Gravity Falls' Pioneer Day, the weird day when Stan tried to teach a bear how to drive, the night when they sneaked off to face Pacifica Northwest in a game of mini-golf and etc.

But as usual, Mabel teased Dipper that he's just uncomfortable and awkward sitting next to Wendy.

"No I'm not."

"Yes you are."

"Ugh!"

They also passed a lot of familiar faces on the way like Mayor Tyler Cutebiker, Lazy Susan: waitress of Greasy's Diner, Mr. Poolcheck from the local pool, Bats Biker: the emotional biker whom Mabel befriended during their first summer in Gravity Falls, the Pizza Guy, and the uncanny Tad Strange.

"Man, we sure missed a lot in Gravity Falls." Dipper sighed.

"Getting nostalgic?" Wendy asked as the car made a turn for 618 Gopher Road, Gravity Falls: the address of the Mystery Shack.

"Kinda." Dipper admitted.

"Come on, bro-bro. Get the nostalgia away because we're here!" Mabel nudged Dipper's arm playfully and laughed.

"She's right," Wendy assured as the Stanmobile slowed to a stop. "Do not be nostalgic or negative because we have arrived."

Mabel quickly opened her door and stepped outside. Dipper was about to open his when a weird feeling struck him. It was an eerie sensation that he last felt during their final confrontation with the Dorito demon, Bill Cipher.

"Dipper?" Wendy broke in. "What's wrong?"

Dipper looked at her and smiled.

"It's nothing… I'm good."

"Cool, let's get inside," Wendy opened her door. She abruptly stopped and glanced at Dipper. "Hey, if you're going through something, just talk to me or maybe your sister, okay?"

"Okay." Dipper nodded but he hates it when Wendy talks to him like this.

"Okay," Wendy smiled back and got off the car.

Shake it off, Dipper Pines. It's another summer to make fun and memorable experiences.

Dipper got out the car and took a deep breath. In front of him was the Mystery Shack. More nostalgic memories floated to Dipper's head… especially the events of Weirdmageddon. It happened three years ago but it still haunts Dipper's mind…

… The laugh… the threats… the chaos and weirdness…

He's gone, Dipper. Dipper told himself. Cipher won't hurt you, your family or anyone ever again.

Just before Dipper could follow Mabel and Wendy, a cold gust of wind caught his attention. And it was followed by a voice:

I'm not gone, Pine Tree … I'm still here …

That's the end of Chapter One.

The Pines Twins are now sixteen and are back for another summer in their beloved town of Gravity Falls. Many things took place off-screen alright including Soos and Melody's engagement. Hey if I have time, I'll write a story about Soos proposing to Melody. I'll try and… yeah…

Anyways, I hope you liked the first chapter; next part will be soon so stay tuned! Since Melody's on vacation and Wendy's no longer an employee at the Mystery Shack, we'll meet the new employees working with Soos.

Can you guess who they might be?

More on what happened to Marco and Star later!

Oh, and Bill too, I guess…

PEACE!

Gravity Falls belongs to Alex Hirsch

Star vs. the Forces of Evil belongs to Daron Nefcy