Rikujou Jieitai Tokumu Chouhou Kikan: Beppan no Inu

The fate of the nation is in the hands of those who have abandoned the law and their names. In the Special Operations Group, an elite unit of the Ground Self-Defense Force, there was a female member who was tired of spending her days in training. One day, she is ordered by her superior officer to a certain garrison, where she is recruited by a mysterious man to join a unit called "Beppan." She was given the name "Nana." She was then thrown into the front line of a national defense battle colored by numerous schemes and violence.

(Source: Kodansha, translated)