SUCCUBUS - 夢魔 The term derives from Late Latin succuba "paramour"

from succubare "to lie beneath" (sub- "under" and cubare "to lie").

Used to describe this female supernatural being's implied sexual position relative to the male sleeper's position.

A succubus is a demon or supernatural entity in folklore, in female form, that appears in dreams to seduce men, usually through sexual activity. In modern representations, a succubus is often depicted as a beautiful seductress or enchantress, rather than as demonic or frightening.