Full Metal Panic! Another

A high school student named Ichinose Tatsuya lives with his father and younger sister. He frequently develops feelings for foreign women, with little success. While operating a Power Slave in the mountains to assist his father's business, he encounters a foreign woman named Adelina. She is accompanied by a military Arm Slave called "Shadow." Tatsuya becomes curious about her presence in the mountains and her armed capabilities. His ordinary life is about to change as he becomes involved with this mysterious woman.