Please come, Reincarnation-san.

A young lady notorious as a villainess tries black magic she heard about from her followers. What is called "reincarnation" involves housing the soul of someone from another world who knows the story that includes one's own existence within oneself, and being shown a dream of what kind of future one would walk if a soul with knowledge of the story were to enter. What sort of dream will she, who carelessly dabbled in this magic, see?