Lillith Harker is no ordinary high school student. By day, she blends in with her classmates, but by night, she is a skilled assassin for the Necrotic Veils. When she receives her mark, proving her status, she's given a dangerous mission: infiltrate the rival Holy Crusaders. While undercover, Lillith meets Onur, a boy her age, and they quickly connect. Neither realizes they are sworn enemies. "The Grim Reaper Is a Teenage Girl" is a thrilling story of love, loyalty, and the clash between duty and desire. Will Lillith and Onur's love survive the battle between their worlds?