Chapter 1
It has been a couple years since the Pines twins have been to the Mystery Shack in good ol' Gravity Falls. Some things have changed, and other things have remained untouched for some time. The twins were now 16. Mabel stopped wearing goofy sweaters; she wears fun sweatshirts instead. She has grown taller, and her body has become more shapely because of puberty. She also has a little acne on her cheeks, chin, and forehead which she tries to hide with makeup. Dipper hasn't stopped wearing his pine tree hat, but he no longer wears his puffy blue vest. Puberty has made him stronger, finally taller than Mabel, and his voice slightly deeper. He's not very muscular though; he also has some acne along the hair line of his shaggy brown hair. Wendy has moved out of Gravity Falls and is going to college. Other than that, everything else seems to be the same.
The Twins are sent to the Mystery Shack again this summer because their parents thought that the kids had so much fun last time and deserve to go there again. Mabel complained a little bit because she wouldn't be able to see her boyfriend for most of the summer, but Dipper was ecstatic about the trip. He knows that it sounds dorky, but he has been reading about and researching all the weird things that happened in Gravity Falls since their first visit. Dipper's prepared for anything.
It's a hot day in June, and the Twins just got off the bus and are standing in front of the run down shack once again. The Mystery "hack" looks just as aged as ever. Speaking of which, Grunkle Stan walks out to greet the Twins. Other than the addition of a couple years, Stan looks generally the same. "Hey kids! How ya doing?" Stan says cheerfully to the kids with his gruff voice. "Come on, Grunkle Stan! We're 16! We aren't 'kids' anymore!" Mabel says in a rude tone; her eyes never once leaving the phone she was texting on. Stan's annoyed by this behavior and leans over to Dipper. "Sheesh! What's her problem?" "She's just grumpy over the fact that she can't see her boyfriend over the summer." Dipper replies quietly so that Mabel doesn't hear. This doesn't work. "I'm not grumpy!" Mabel says sternly.
At this moment, Soos pokes his head out of the Mystery Shack and sees the teens. A big smile spreads across his face. He drops his broom and runs up to the Twins. "Hey dudes! You're back! How was your trip? Man, you guys have grown!" Soos happily grabs some of the teens' bags. He must have really missed the company that he had with the Twins and Wendy. Soos looks like he hasn't changed a bit. Dipper says, "Our trip was fine. It's kind of hot out. Maybe we should go inside?" The group goes inside the shack.
After some small talk about what everyone's been up too, the Twins go up into their old room to unpack. Actually, Dipper and Mabel go to separate bedrooms because of the obvious changes in their bodies, and both would feel more comfortable with their own space. Mabel is staying in the room with the body switching carpet (which is neatly rolled up and thrown in a closet), and Dipper stays in the old room that the Pine twins used to share. Dipper thinks to himself as he unpacks his things: I can't believe Wendy's not here anymore. Now that I think about it, It was kind of silly of me to like such an older chick. That would sort of be like Mabel dating some 12 year old right now. Weird. Who the hell is Mabel dating? She's always talking about some guy, but I don't remember seeing him. Whatever. So what should I do this summer in Gravity Falls? Definitely prove that some weird shit is happening in this town, but what about some fun stuff? Maybe I should make some new friends. I'm not that social in my old town, but that's because most of the teens there find me weird for believing in all this supernatural stuff. If only those assholes saw half the stuff me and Mabel have seen! But this is sort of a new start. I'm still familiar with the town, but I don't have to worry about things like trying to impress Wendy or standing up to Robby because they are both gone. The people that I've met here have either forgotten or could care less about us. Yep. My plan this summer is simple. Prove that freaky shit is going on here and make friends. Wonder which will be harder?
Thanks for reading and please review and follow :) This is my first fan fiction on this site so please be nice, but anything to help my writing is greatly appreciated. (I know that this chapter isn't the best but I hope that later chapters will be better.) I did already post this chapter a couple days ago, but I messed up on some parts, so I fixed them and put it back on here. Chapter 2 coming soon :)