In the new season, when the Mikumo team participates in the B-class battle to advance to the A-class and select the expeditionary force, Garopura, a vassal state ordered by the largest military state in the Near World, appears and attacks the headquarters. The curtain is opened with the counterattack of the elite border troops who were summoned in secret. Can the border defend the headquarters from the attack of Garopura, who leads a large number of Trion soldiers! ? With the development of animation, the animation world is becoming more and more lively.