Megumi Nasu

Ayaka Nakanishi is an ordinary twelve year old girl walking Ryan, her German shepherd, when heavy rain obliges her to seek refuge inside a telephone booth. The storm causes a strange phenomenon that sends both Ayaka and her dog back in time to March 7th, 1945.

In the distant future, a mysterious floating object appears suddenly in the center of Tokyo. The top secret mission unit Alta Mira Agency or AA is comissioned by the Defense Agency to deal with this mysterious invader. In charge of the robot training is Funagai Otsuya. He trains five special girls to use the Battle Soles to push back the enemy even at the cost of their lives.