After the Great Collapse, the year is 2029. The stargate opens wide, and the "Celestial Beings" draw ever closer. Welt and Void Archives pass through the stargate and arrive at the "Celestial Beings'" base. The base's data reveals information about another universe. Why does the person in the data look exactly like Himeko? Even though Himeko Murata is already...

After learning the information, Kiana decides to follow Welt to another universe to stop the "Celestials".

The timeline is from the end of the official comic, Away from Home, where Welt travels to the Star Iron Universe.