In the wake of the Great Tokyo War, Japan, as the world once knew it, no longer exists. What remains is a fragmented network of independent nations ruled by heroes known as Bests. Each Best commands an army made of the Rest as they seek to conquer anyone in their path. Enter Nozomi, Yukina, Ai, and Chiaya. These four intrepid and adorable girls are ordered by their Best to travel across the country by motorcycle, keeping a watchful eye on the field of battle wherever they encounter violence between warring nations!