In the far-off year of 20XX, constant attacks and hostility from an evil secret society have caused several private defense companies to spring up around Japan. Determined to get revenge for the destruction of her hometown, Haruka joins the public defense corp!

Japan, in the year 20XX... The evil secret society Jakou is plaguing the country, causing several private defense firms to be founded. These companies protect Japan alongside the police and self-defense forces.

With both Jakou and the protectors of peace using newly-developed mechs to fight, the battlefield has begun to change, with damage to cities and infrastructure reaching unimaginable levels!

And yet, despite Jakou's power, the citizens of Japan are fighting back. Haruka, the hero of our story, witnessed the destruction of her hometown several years ago, and she's determined to take revenge! Thus, she joins the public defense corp Toyokumo, aiming to pilot their freshly-designed machines to take down Jakou for good!