In the world where all hopes of humanity are lost to the Primordial beings' reawakening, known as Tyrants, the warriors of humanity, Operation Squad, rose to protect humanity. In this world, after ages, in a sudden appearance of a Tyrant, a girl named Madelyn Spencer, just lost her parents. Luckily, her brother and friend survive, however, chaos and destruction around made them lose their hope, and Madelyn was almost about to lose her life. But,...