Board Thread:General Discussion/@comment-4698889-20170224092621/@comment-96.234.151.66-20170302163126

It has not been confirmed yet, it's a theory based on the tone of the prologue as it has been translated so far. Outside of the lack of evidence for anybody being able to travel through time in the series so far, I have to agree that the setting does seem to be very "Second Period-esque" for lack of a better term.