Well, generally speaking, it is a story about a deliberately cultivated evil ghost who is forced to do tasks in various worlds in order to avoid being hunted.
The Red Devil's love story is incompetent, so it may not have any CP.
This article involves movies, animation, novels, etc...
The heroine is proud and rational, powerful but not omnipotent, willful but not naive, cruel but not heartless. Lazy, not fond of using his brain, and has always believed that in the face of absolute power, all conspiracies and means are in vain.
In short, this is the product of the resentment after the Red Devil book famine...