New Atelier Rorona: Origins of the Alchemist of Arland will feature future alchemists Totori and Meruru as cameo characters; that much was known – but now there is new information on the story arc which called “Overtime Mode”. This is a mode in which you need to find a special item that allows them to travel back to their own time period.
The Japanese release date is November 21, a world-wide release date is TBA.