Do you believe in the existence of aliens?
Have you heard their stories?
Have you ever caught any clues of their existence?
Whether it is gone from the memory, when recalling the remaining memory, will you doubt whether it was a dream or a joke.
They are here, everywhere, and omnipotent.
Concept: What you think of as an enemy may be a friend, and what you think of as a kindred spirit may be a devil.