Chapter Text
It was Dipper and Mabel's first day of high school.
Everyone was so heartbroken that the twins had to leave Gravity Falls, that the Stan’s called their parents before they could get on the bus. He put them on speakerphone and everyone convinced them that they should stay. Everyone was so excited that they got to stay that they continued their birthday celebration late into the night.
Dipper was especially happy about this because that meant he would be going a year (hopefully more) without any bullying.
Dipper sighed as he finally got settled.
Since the teacher wasn't in the room yet, he allowed himself to day dream. He could only imagine what winter in Gravity Falls would be like, especially after how he had seen it in the summer. He still hoped his parents wouldn't make them go back to California anytime soon - ever since arriving to the town, he’d felt like Gravity Falls was his true home.
Suddenly the teacher walked in and snapped him out of his thoughts.
"Alright class, take your seats. Class is officially starting."
Dipper sat next to Wendy with Mabel on the other side of him. Wendy gave him a quick smile and then started paying attention. He didn't mean too, but a few minutes into the lecture his mind began to wander again. He thought about Bill and the events of the summer over and over again.
Memories started to resurface, and not good ones. He thought about the shacktron, and fighting Bill, and Bill turning Ford to gold, and then . . .
A clear image of Bill popped into his head, but he was different. He was no longer a triangle, no - he was human. He was tall too - much taller than Wendy by a long shot. Tall and skinny. He had half black, half blond hair and an eyepatch over his left eye. Dipper guessed the boy was about 15 in this form. Dipper just stared into space as he imagined Bill's new form.
"Dipper Pines?"
"HERE!" Dipper yelled a little TOO loudly. The teacher just smiled and wrote his name down, not noting anything wrong with the teen.
"Bill Cipher?"
Unfortunately, Dipper had been drinking from his water bottle, and he spit it out, all over Wendy's shirt. Dipper's eyes widened in horror as he started choking and half the class and all their friends stared at him. Wendy just gave Dipper a look and then stared at him.
"Sorry I'm late!!!"
A boy about the age of 15 - like in Dipper's day dream, walked in at that exact moment.
"Ah, there you are Cipher. I won't dock you points for lateness since its the first day, but consider this a warning," the teacher said.
"Thank you," Bill said as he sat next to Wendy. He winked at Dipper as he threw his bag down next to him.
"Excuse me, can I talk to my sister in the hall for a minute?" Dipper asked as he was still half choking.
"I suppose," the teacher sighed as she motioned for them to leave.
Dipper said thank you and grabbed Mabel's wrist and dragged her into the hall.
Out in the hall, Dipper and Mabel started to panic.
"It's Bill!!!" Dipper shrieked.
"Like DUH," Mabel said, rolling her eyes.
"What do we do?!" Dipper shrieked.
"Talk to Ford? I don't know, maybe there's something we can do in the meantime-"
“Well, well, well, if it isn't the Pines twins- shooting star and Pine Tree!" Bill grinned as he leaned forward to reach their height so he could look them in the eye.
“You! Get out of our school! Get out of our town!” Mabel snapped.
"Pfft, like that's gonna stop me! You're cute shooting star. Boop!" Bill said as he tapped her nose. Mabel blushed and smacked his hand away and moved closer to Dipper.
"Ony Dipper's allowed to do that Bill . . ." Mabel mumbled and crossed her arms.
Bill still heard. His eye turned red.
"WHAT was that shooting star?" Bill growled.
“Nothing!" Mabel squealed in fear.
“Oh, I don't think it was nothing shooting star! You were giving me attitude, and I don't appreciate that one bit!" Bill snapped.
“That's enough Bill!"
Dipper shoved Bill against the lockers, away from Mabel, protecting her. Bill didn't seem to have any injuries, but he was completely and utterly pissed off at Dipper now.
“Dipper are you insane?!" Mabel shrieked, "He's going to KILL YOU!"
“Not a chance Mabel, I won't let that happen!" Dipper said fearfully, a skill he'd learned from confronting the alien security system.
“Oh Pine Tree, you're just too adorable!" Bill grinned. "Haven't you learned ANYTHING from Weirdmaggedon? You can't stop me Pine Tree!" Bill poked Dipper's nose and Dipper blushed.
“THAT'S ENOUGH BILL!"
Dipper and Bill stared at Mabel - she was crying, and that was it for Dipper - he was officially FURIOUS with Bill. Nobody made his sister cry. If they did, they didn't survive.