Early in the morning, at the mystery shack where Mabel just woke up she excitedly jumps on her bed and runs to Dipper to wake him up

Mabel: wooooooooooh!
Bro bro! Wake up! Wake up!!
Dipper: ahh! I'm up! I'm up... *Yawn* don't you think its a little too early to get a sugar rush....? Haha...
Mabel: oh c'mon! Its our first day at high school in gravity falls!!! I can't believe mom and dad allowed us to lived here for as long as we liked!!!
Dipper: hehehe... yeah, knowing how they are its really surprising
Mabel: lets go get ready! I can't wiat to meet Candy and Grinda at the bus stop!
Dipper: you go ahead, I'm right behind you

Mabel rush to the bathroom and gets herself ready than runs down stairs and she smelled her breakfast from the kitchen to only see her great uncle Stanford cooking breakfast

Mabel: morning grunkle Ford!
Stanford: ah morning Mabel, where's Dipper?
Mabel: eh hes still getting ready as always
Stanford: are you excited for your first day?
Mabel: ofcourse!!! Tho Wendy said its a nightmare, i know i can prove her wrong! Today is gonna be the best first school day ever!!!
Dipper: geez you really need to stop shouting early in the morning
Stanford: btw Dipper, hows that eye of yours? Feeling any better?
Dipper: huh? Yeah its alright, still need time to recover tho
Mabel: i can't believe it got that bad bcz you fell face flat on a rock
Dipper: hehehe unlucky me i geuss

Everyone sat down for breakfast and once they finish, Mabel dragged Dipper by the arm and run her way to the bus stop, it was about 10 minute run due to how Gravity Falls massively changed threw the years, the people made high fancy buildings, for basicly entertainment and food, places to sleep, it all comes in a cheep price too, all was the wishes of the town mayor apparently, and they even made a gardening group who go out to far away fields and grow many wonderful flowers and trees, they made a Zoo for animals that pass them by ofcourse, and 1 thing that remains a mystery to everyone was the forest, after the end of the world deep, deep inside the forest, something changed, mysterious forces roams those woods yet no 1 has ever seen it with their own eyes so no 1 can ever know what lies within

Back to school, Mabel walk off to class with her friends waving goodbye to Dipper bcz they have diffrent classes, once she reaches her classroom, she excitedly sit down at her seat and look threw her diary when suddenly a tall boy with tanned skin, yellow with black highlight hair, golden eyes in a jock jacket sit right next to her, seeing the gorgeous man Mabel did the most reasonabl (Mabel thing) to do and try to flirt and get to date him

Mabel: ohhhh hey handsome, you from this class?
???: yep! You too?
Mabel: ofcourse! My name's Mabel! What's yours good looking?

He smiles widely a little and simply said

'Names Spark'