S1, E1: Sacred stones are implanted in the bodies of two boys. Decades later, the world is divided. There are those who want to eliminate the "kaijin" and those who want to coexist with them. In the midst of this, there is a man, Kotaro Minami who’s somewhat a recluse. A young activist, Aoi Izumi wants to change the divided world. When Aoi and Kotaro meet, the time which had stopped begins to move again…