Ground Self-Defense Force Special Intelligence Agency: Invisible Force

Within the elite force of the Ground Self-Defense Force's Special Operations Group, there was a female soldier who grew tired of the routine training days. One day, she receives an order from her superior and heads to a certain military base, where she is scouted by a mysterious man for a unit called "Separate Squad." Given the name "Nana," she finds herself thrust into the forefront of the nation's defense, filled with countless schemes and violence.