Ange and Tusk.Ange abruptly wakes in a desolate place and meets Tusk and Vivian, who has become a DRAGON again. They assume that the place is in a different dimension, far away from Arzenal. Ange makes a reconnaissance trip between dimensions, and she is stunned by to see "Akeno-Mihashira" in the Misurugi Empire. They follow the automatic guide robot and enter the capital third shelter, afterwards, management computer called Himawari actives, and reveals that over 500 years ago, the Seventh World War took place. Due to this abnormal situation, Earth became a place that is almost impossible to survive in...