.・゜゜・Someday mysterious scarlet, slimy balls appear in the sky, floating relentlessly. Everyone is scared if the end of the world is near! The government releases a circular to prepare an army under the national service act and imposes a camouflaged strategy to attract young students. They end up signing in for something they couldn't imagine in their worst nightmares. an apocalypse that could eventually end the whole world. They undergo military training, but what will happen when the spheres start falling? : ̗̀➛ IB: Duty After School.