Once Bitten (a Billdip story, vampire AU)

Dipper Pines, a human teen crossed paths with Bill Cipher, the head vampire of Gravity Falls, who bites Dipper and turns him into a bloodsucking creature, much to Dipper and Mabel's dismay. Now Mabel, Dipper's twin sister, must work with Gideon and Wendy in order to get Dipper back to normal. U...