In the near future, enormous hostile life-forms called Fiarem are at war with Earth, and mass-produced battle androids cannot match creatures that stand well over 50 meters tall. To break the stalemate, a growth factor that can enlarge living things is turned to military use. Six young women chosen as suitable for enlargement form the Ragna Strikers, a special unit armed with advanced weapons and able to grow to 38 meters. Ayano Anemori and her friends go about their everyday lives between clashes with the violent Fiarem in this short-format action series.