As a magical girl protecting the city's peace, Yozora Hoshikage is a high school girl who loves bright and cute things. One day, after defeating a supernatural creature as usual, Yozora returns home to discover the lifeless body of her younger sister, Sakuya. Devastated by the loss of her beloved sister, Yozora learns there is a way to bring Sakuya back to life. That method is—killing other magical girls. [Original Manga](https://www.cmoa.jp/title/318553/)