Magical Girl Lyrical Nanoha EXCEEDS Gun Blaze Vengeance

Thirty years after an invasive alien species nearly wiped out humanity, the struggle for Earth has never truly ended. Survivors fight to reclaim territory, while the United Nations operates EXCEEDS, a force created to contain new attacks. Far from the main fronts, Shiina Kuze lives on a remote island in the nation of Mizuho. She attends high school, hunts the creatures that reach the island, and wants nothing more than a quiet life beside her younger sister, Setsuna. That fragile routine collapses when a single incident connects Shiina to the much larger war. The conflict surrounding the invaders pulls her beyond the limits of an ordinary hunter and into a struggle that reaches far beyond Mizuho, forcing her to decide how far she will go to protect the life she still has.