Advancing to the Future／Next Door/Basic

Note: Due to this event's connection to the stories Checkmate and Element, they have been made temporarily available to read in-game via banners by the top right of the event page.
 * -|Introduction=


 * -|How to Play=


 * -|Tour Missions=


 * -|Cards=


 * -|DLFS Courses=


 * -|Live Challengers=


 * -|Rewards=