[Gravity Falls]
[In Mabel's room]

Grace, Mabel, Candy and Grenda:*Playing Truth or Dare*

Mabel:*Spins the bottle*

*Bottle stops and points at Candy*

Mabel: Candy Truth or Dare?

Candy: Hmmmmmmmmmm Truth?

Grenda: Come on Candy you always pick Truth.

Candy: Alright Alright Dare.

Mabel: I dare you to tape yourself to the wall again.

Candy: Okay. *Grabs some duct tape*

Grenda:*Helps her*

[Seconds later]

Candy: Done! *Stuck to the wall*

Gomper & Waddles:*Chewing on the rolled duct tape*

Candy: Spin for me.

Mabel: On it! *Spins the bottle*

*Bottle stops and points at Grace*

Candy: Truth or Dare?

Grace: Dare, I'm not afraid.

Candy: I dare you to possess Bill Cipher. *Tries to contain her laughter*

Grace: You can't be serious right?

Mabel: This is serious Grace, now go possess your boyfriend!

Grace: -_- He's not my boyfriend. *Teleports away*

[In the woods]

Bill:*Roaming through the forest*

Grace:*Teleports in front of him* Hi.

Bill: Uh hi Falls?

Grace: Possession! *Possesses Bill*

Bill:*Out Of his body* *Back in his original triangular form* What the-Falls!

Gill:*Opens their eyes revealing amethyst violet eyes* It worked!

Bill: Falls what was that for?!!

Gill: Sorry Bill it's a dare. *Teleports back*

Bill: Hey! *Teleports after them*

[Back in Mabel's room]

Gill:*Teleports in front of everybody* Did it.

Mabel: No way that's awesome!

Gill: Yeah can I unpossess now?

Candy: Not yet I changed the dare.

Gill: What's the change?

Grenda: Possess his body for 24 hours!

Gill & Bill: WHAT?!!!!

[Time Skip]

Gill:*Checks theirselves in a mirror* I'm sure it's not that bad.

Bill:*Floats in front of their face* Not that bad, do you know how long it took for me to make that meatsack of mine?

Gill: It's just 24 hours and I have to go hang out with Wendy and her friends. *Teleports along with Bill*

[At Greasy's Diner]

Wendy & her friends:*Sitting at a booth*

Gill:*Teleports next to Wendy* What's up?

Wendy: Woah Bill, why are you here?

Gill: Relax it's just me, Grace.

Wendy: Grace?

Gill: Yeah, I'm possessing him for a dare.

Wendy: Woah that's rad. How long?

Gill: 24 hours.

Tambry:*Texting on her phone* Status Update: Demon girl possessing her demon boyfriend for 24 hours.

Gill:*Frowns and blushes* He's not my boyfriend Tambry.

Robbie:*Scoffs* Yeah right we always see you two talk and hangout together.

Thomson: Sometimes argue like a married couple.

Gill: We were just discussing and Bill was "helping" me with my powers.

Bill: They called us a couple, disgusting.

Wendy: Hey let's get out of here.

*Everybody agreed and headed out of the diner*

[Time Skip to hanging out at the Cemetery]

Gill: Hey that one looks like a heart. *Points at a cloud*

Nate: But flip it upside down you got a butt.

Everybody:*Laughed out*

Gill:*Laughs along*

Bill: 'Mmm hate human hang outs. Hate when Grace possesses my body. Hate her adorable laugh, her gentle smile, her innocent blushing and.........WHAT AM I SAYING?!?!?!?!?!?!' *Pokes Gill's head*

Gill: Oh, guys I better get going.

Wendy: Do you have to?

Gill: No worry, next time we'll hang out longer.

Wendy: Sweet dude.

Gill:*Waves and teleports back*

[In the Gift Shop]

Gill:*Accidentally teleports in front of Stanford*

Ford: Bill! *Pulls out his ray gun*

Gill: No wait Ford it's me Grace!

Ford:*Confused* Grace?

Gill: Yes I'm just possessing him for the day.

Ford:*Looks at Gill oddly* You sure you're not tricking me Bill?

Gill: Stanford, then I wouldn't call you Sixer by now.

Ford:*Puts his gun away* Sorry Grace I was just making sure you're not Bill.

Gill: It's cool. Mabel!

Mabel:*Rushes downstairs* Hey Grace.

Gill: How much longer?

Mabel: 2 more hours.

Bill: Great more agony.

Gill:*Looks at him*

Bill: What?

Gill: You'll survive. Just two more hours and that's it. *Summons a mirror* *Checks their reflection*

Bill: I look good don't I?

Gill: Besides the color yellow.

Bill: Hey, yellow is a decent color.

Gill: I prefer black and red. *Snaps their fingers* *Changes yellow to black with red assets*

Bill: I look ridiculous. The red hair reminds me of someone I know from another reality.

Gill: Calm down Dorito there's still an hour and a half left for the dare to end.

Bill:*Groaned in annoyance* Fine, what now?

Gill: Looking for Haters around.

Bill: It's 7 at night already.

Gill: I know come on. *Teleports away with Bill*

[In the forest]

Gill:*Roaming around* The sky looks beautiful with warm colors.

Bill: Yeah kind of nice.

Gill:*Ignites a violet fireball*

Bill: What are you doing?

Gill: Playing with fire. *Tosses it around* *Checks the time* 10 minutes left.

Bill: Okay I can do this.

Gill:*Floats around* Hmm I should float more often.

[10 minutes later]

Bill:*Possesses his body back*

Grace:*Jumps out* Crap....

Bill: Finally body sweet body! *Stretches out* *Changes back to his yellow attire*

Grace:*Gets up* I finally finished the dare.

Bill:*Glares at her*

Grace: What?

Bill: Never possess me ever again.

Grace: Can't promise that, okay but it was a dare nothing personal.

Bill: But I'll make it personal, you'll see. Hehehe.....

[The next day]

Grace: BILL I'M KILLING FOR THIS!!!!

Brace:*Laughing at her reaction while possessing Grace* Sorry but this is payback Falls!

Grace: You better not stab forks in me!

Brace: No promise like I did once when I possessed Pine Tree a while back.

Grace: You...Not a single utensil on me. Not even a toothpick.

Brace:*Shakes their head* No can do.

Grace:*Groaned in frustration* Another 24 hours.