(Based on devil's line) (and can be any crush)

Ever since you were young, you were told monsters lurked in human form that feast apon blood. They are called devils.

Recently a lot of theories and sightings of them had been seen, but there was no police records or reports , so they were just cryptic things. Unfortunately one day it seems like someone was following you while walking home... They looked human, but it also seemed that they hadn't slept in a week with the dark circles under their eyes. What to do...
(Video is to show what they look like as devils)