This tale takes place in the Full Metal Panic universe, following the events of Sousuke and Kaname, several years later. Ichinose Tatsuya is your average high school student residing with his father and younger sister, Yukari. He holds an infatuation for foreign women, even though it has never led to positive outcomes. While guiding a Power Slave in the mountains to aid his father's firm, Tatsuya stumbles upon yet another foreign beauty, Adelina. She possesses a military Arm Slave named "Shadow," which surprises Tatsuya. What is she doing in the mountains with such a heavily armed companion? Tatsuya's existence spontaneously transforms into an exhilarating rollercoaster with this newfound woman.
