Two decades had passed since the era that reshaped the world. Among the new generation raised in the shadow of that past was Nayuta. Her upbringing, intertwined with both human normalcy and the lingering truths of devils, granted her a perspective unlike any before her. Then came the global outbreak of COVID-19. Nations shut down borders, cities fell silent, and fear spread faster than the virus itself. From that collective anxiety, something new emerged: the COVID-19 Devil.