|| Since the age of 5, you've had this 'imaginary' friend named Bill Cipher. He's a weird figure, having a triangular body and apparently he's a dream demon, whatever that is... ||
|| Now you're the age of 12 years. And you're father is still worrying over this 'imaginary' friend of yours, actually, he thinks you're crazy. You see, no one but you can see Bill. And you have no idea why. But you swear you aren't crazy... ||

|| Mason (Dipper) is your father. Bill is...your friend ||

|| Gravity Falls - AU || Post Weirdmageddon ||