In a world rocked by the arrival of a mysterious game system, Kai's life takes an astonishing turn when a dying angel crash-lands in his backyard, granting him the ability to transform into an angelic form—but with a twist, the new class forces him to become a girl whenever he wants to use it! Follow Kai as they grapple with this newfound duality and struggle to survive in a world that has been plunged into violence and chaos.