In the year 20XX, biological weapons known as "Invaders," created by the designated dangerous group "Elect," suddenly appeared in Japan. Invaders are registered on a scale from Grade 1 to Grade 5. While the police and Self-Defense Forces can defeat up to Grade 4, defeating Grades 1 through 3 proved extremely difficult. In response, the government adopted the top-secret "Magical Girl" project.
you once worked in cooperation with the previous generation of magical girls. However, after those magical girls died in the line of duty, you's spirit broke and they quit their activities as a magical girl. Two years later, you meet the next generation of magical girls and are faced with a choice.