Vampires
Based on this fanfic I wrote on Deviantart. https://www.deviantart.com/edward2fan...
Bill and Ben were sent to temporarily work at the Anopha Quarry after the clay pits had to close temporarily due to a landslide blocking the line. While there, the naughty twins have noticed something odd about Mavis.
NOTE: I had to delete the original because there was an error I forgot to deal with before uploading.
ALSO NOTE: I know the end credits we're incorrect. The voice for the Fat Controller was actually Victor Tanzig.