Thousands of years ago, a catastrophe known as the "Great Disruption" erased almost all traces of human civilization. History, technology, inheritance... All were annihilated into the unknown.
Until five hundred years ago, a secret realm called [Time and Space Realm] quietly arrived.
It emerges from nothingness and connects countless broken fragments of time and space. People step into it and can personally enter the sealed "past" - dialogue with lost civilizations, fight on the battlefield of annihilation, and snatch back a trace of the truth from the dust of history.
