(Bill x Reader x Dipper) Vulnerable
The Supernatural Department started ever since the month after the traumatizing incident in Gravity Falls, and the same month when the dream demon, Bill Cipher, turned to stone. Two agents, Power and Trigger, sent out by the government, offered Dipper the job to be the head of it all, despite him being thirteen years of age. Of course, the young lad accepted to reassure that any magical creature would never trigger any sort of apocalypse; generally, danger to humanity.
Now that years have passed, detective (L/n) worked her way up in the Supernatural Department and ended up being partners with the head of the said department; Dipper Pines.
When she gained the promotion, she'll make sure that she'll help detective Pines throughout any unexplained and absurd cases. Thus, this book will start off from the first day of the female detective's new career...
And the first day of Bill Cipher's newfound freedom.