I Live in Isekai Zero: Will the Reincarnated Save the World?

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I Live in Isekai Zero: Will the Reincarnated Save the World?

Name: I Live in Isekai Zero: Will the Reincarnated Save the World?
Author: Tadashi Ken

Events prior to the main series from 10,000 years ago , how the first generation of outlanders come , who summoned them and for what purpose and the link with the current time and events!!