You were given to Bill Cipher by your horrible parents and now you're stuck in a room with Dipper. The reason he's keeping you and Dipper in that room is because he can't find Ford and he needs the equation to get out of there quick. There may be more reasons, but he won't tell you. Yet.

A small idea I had for a Bill Cipher X Reader story. Parental Guidance is advised for some parts. Enjoy!