Toori Aoi heads the student council and the Supreme Federation aboard Musashi, the flying ship that carries Musashi Ariadust Academy and what remains of the Far East. Humanity reenacts recorded history from the Holy Book Testament, but in Testament Era 1648 the Testament stops naming what comes next, and Toori sets out to take back the Divine States and Horizon Ariadust. NEXT BOX opens the line that follows the original novels: its first volume retells that story with added material and points toward the sequel.