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This article tells the story of a time traveler who survives in another world and tries to understand the true face of the world. It is a personal hobby, it is being revised, and there is no timetable. It is not recommended to read.

Formerly known as "Mythical Earth History Investigator" This article tells a series of stories about a person who may be poor in all aspects and is forced to travel back and forth between various eras on earth because of a demon book of unknown origin. Works of personal interest, updated from time to time and not guaranteed to be completed. All plots, knowledge, names of people and places involved in the work are fictitious and semi-fictional, and should not be imitated or taken as real.