The “mystic” genre is often confused with “horror”. Their main difference is that in mystic the plot is always led by something inexplicable, paranormal, absolutely unreal. The viewer, while watching an anime of a similar genre, is immersed in the event, experiencing and becoming interested. Horror and fear are, most often, a secondary effect of viewing mystic.
The most popular mystic anime themes are supernatural or otherworldly forces (magic, mediums, angels and demons, etc.). Mystic is an attempt to understand what is impossible to understand, an attempt to see what theoretically can exist, but has not yet been proved by human.