Gunparade March: A New Song for the March

Gunparade March: A New Song for the March takes place in a world where humanity has been at war with alien invaders for over fifty years, starting in 1945 at the end of the Pacific War. Atsushi Hayami, a young member of the Japanese military, and his high school classmates in Unit 5121 fight against the extraterrestrial threat, using advanced technology like HWT humanoid combat machines and the PBE bomb. The prolonged conflict has forced people from various cultures to unite under a single banner, and the story follows the experiences of this new generation as they face the harsh realities of war.