Gravity Falls High School (Mabel x Bill)

First day

It was a few years ago when Bill tried to concur the world, now the twins are 15 and they joined Gravity Falls High School. It was their freshmen year. They went to check their schedules.

(Mabel's schedule)
Subjects Monday Tuesday Wednesday Thursday Friday
First period: English P.E. Geography Chemistry Free
Second period: Physics Free English History Latin
Third period: Latin English Biology Math English
Forth period: History Math Physics English Speaking
Lunch
Fifth period: Free Biology Music Free Spanish
Sixth period: ICT Art Free Spanish Geography
Seventh period: Chemistry CCA Math CCA ICT
Eighth period: Library- Normal students Theatre- Performing Art students

(Dipper's schedule)
Subjects Monday Tuesday Wednesday Thursday Friday
First period: English P.E. Geography Chemistry Speaking
Second period: Physics Free English ICT Latin
Third period: ICT English Biology Math English
Forth period: History Math Free English Free
Lunch
Fifth period: Free Biology Music Free Spanish
Sixth period: Latin Geography Physics Spanish Chemistry
Seventh period: Art CCA Math CCA History
Eighth period: Library- Normal students Theatre- Performing Art students

They have the same class for most of the subjects . They were quite glad because they might get lonely without friends. For the eighth period, Mabel decided to join the Performing Art Club while Dipper is just going to stick with the library.

The school bell rang, signalling students to go to their respective classes. They both have English together for the first period.

When they walked into the class, the twins saw their friends, Pacifica, Candy and Grenda.

Candy: I didn't know you were joining this school!
Mabel: Me too, our parents just suddenly called and told us we could study here.
While Mabel was talking to her BFFs. Dipper waved to Pacifica.

Dipper: Hey... mind if I sit here?
Pacifica: No, go ahead.
They both blushed and Mabel noticed it too. Mabel didn't mind much sitting alone so she just find a random spot that was empty.

After Mabel found a sit, a brown hair women walked in. She was wearing a formal attire. Red blouse and black pencil skirt, hair tied up to a bun and was wearing black heals.

Women: Good morning class, my name is Miss Lilian. I am going to be your English teacher for this whole semester or year. As some of you might know, I am really strict on homework due dates and talking in class.
She glared at some students, that were still talking. After the students quiet down. A blond teen walked in, he was wearing a yellow tee-shirt and a pair of black jeans. The only thing unusual was his eyepatch.

Miss Lilian: Boy! You are late!
Boy: Sorry, I was quite busy.
He said that and introduced himself.
Boy: Name's Bill, nice to meet you all.
Dipper and Mabel gasps on what they have just heard.
Bill walked towards where Mabel was sitting and asked if she mind.
Bill: Hey Shooting Star, can I sit next to you.
Mabel was silent and nodded. As you know, only Bill Cipher calls her by that name.

Dipper wanted to help her, but Miss Lilian already started class. Mabel didn't quite focus in class with Bill smirking at her.

*after English*

The students and Miss Lilian left the class and Dipper, Mabel and Bill was the only ones there.

Dipper: Bill! What are you doing here!? And who are you possessing?
Bill: What are you talking about Pine Tree. This is my human form and I just wanted to try a teenage life.
Mabel: What's with those smirk you gave me during class anyways!
Bill said nothing and just laughed really hard.

Then suddenly they remembered about what Bill did to the town years ago.
Dipper and Mabel: And we thought we defeated you!
They both screamed at the same time.
Bill: HahHAhaha, you might defeated me but it doesn't mean I'm dead or something.
They both went speechless.
Dipper: So your going to try concurring this town again?
Bill: Oh no.. I'm now on a different mission.

Then the bell rang.
Bill: Oh well, see you Shooting Star and Pine Tree.
He then winked at Mabel.
Mabel: What the... what's wrong with him.
Dipper: I don't know, but this doesn't look good if he's back. We need to tell Grunkel Ford.
Mabel: I'm with you, let's tell him after school.

After saying that, they went to Physics class together.
Bill was in ever class Mabel have. Dipper got a bit worried about Mabel. But Mabel told Dipper it was going to be fine. Dipper found it suspicious for Bill to have the same time table as Mabel. Bill even went for Performing Arts.

In classes, with or without Dipper, Bill never waste a chance to sit next to Mabel. He even scared away Candy and Grenda. Even during lunch, Bill brought Mabel food and sat with her. Dipper found it annoying but the day went on.

*after school*

Dipper: I cant believe that he is back. And on a different mission? That is insane.
Mabel: I know, he even sit next to me in every class we have.
Dipper: So he is sitting next to you for almost every class?
Mabel nodded.
Mabel: Every class on Monday so far... but he was really nice to me... especially lunch.
Dipper sighed as they walked back to the Mystery Shack.

*in the Mystery Shack*

Dipper and Mabel went to find their Grunkel Ford in the basement.
Dipper and Mabel: Grunkel Ford! ... Grunkel Ford!
Grunkel Ford: Yes!?
He was worried that a monster hurtled them or something.
Dipper: Bill is back!
Mabel: And he is human like!
Dipper: And now he is also super nice to Mabel!
Grunkel Ford: Wow... calm down... wait... DID YOU SAY BILL?
Dipper and Mabel: Yes!
Both of them nodded at the same time.
Grunkel Ford: But how can it be? We defeated him.
Dipper: He said something about 'you might have defeated me but it's doesn't mean I'm dead'
Mabel: And he said he is on a different mission now!
Grunkel Ford: Well.. we can't jump to conclusions here. Let's see his next move and we can talk about it. But now let's just have dinner and a nice warm shower then go to bed. What do you say?
The twins nodded and ran upstairs.

Grunkel Ford: What are you up to Bill...
He mumbled to himself.