Spirit Chronicles: Sword Saint

At first, a child sought answers to his presence in a world that he did not consider his own. He wants answers from his presence there. But, there came a point where he stopped caring about that. Until someone appeared in his dreams informing him of a shocking truth...
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*This FF is a translation of my FF which is also being posted here.
*Although the Re: Zero tag is present in this FF, I placed it because the MC has a relationship with a family of swordsmen from that world, among other things... but Re Zero characters will not appear in the Spirit Chronicles World.