Black Bullet(2014)

Black Bullet is an action anime series set in a near-future world where humanity has been pushed to the brink by Gastrea, a viral parasite that forces survivors into walled territories. Rentaro, a teenage member of the Civil Security organization, fights these creatures alongside Enju, a gifted young girl with extraordinary abilities. When the government assigns them a classified mission to protect Tokyo from destruction, the pair must confront threats far greater than routine patrols. Blending high-stakes combat with character-driven storytelling, Black Bullet explores survival, duty, and the bonds forged in humanity's darkest hour.