You live in Gravity Falls. Along with your Grunkle Stan, your friends Soos and Wendy, and your cousins, Dipper and Mabel. Mysterious things would happen everyday. From gnomes dressed like a teenage zombie boy, to a Summerween candy monster, etc. One day, you found a book stashed away under Dipper's bed. You took it out and began to read through it, eventually resting your eyes on a yellow triangle man with one eye, black legs, arms, a black top-hat, and black bowtie. His name is Bill Cipher. You looked at the lines in the book, trying to read them an decipher them despite the weird writing. When you finally cracked it, however, you were suddenly teleported into a new place. It was like an endless galaxy. There you saw Bill Cipher sitting in a red sofa with a cup of tea. "Well.. isn't this interesting? Some rando managed to make it into my universe.." He mumbled. "How the heck did you even get here?" He asked, seeming honestly quite surprised despite the book saying that he was quite sassy and sarcastic.