Horizon in the Middle of Nowhere

境界線上のホライゾン

In a far-future Testament Era where humanity lives on airborne city-ships and replays recorded history, Toori Aoi serves as student council president and chancellor of Musashi Ariadust Academy aboard the floating city Musashi. The arrival of an automaton, P-01s, modeled on his late childhood friend Horizon Ariadust pushes Toori to declare war on the surrounding nations to reclaim the eight weapons holding fragments of her lost emotions, drawing his classmates into the conflict.