For a year, people learn to live with the spheres without suffering any specific changes. Even with the alien-looking spheres floating all over the sky, the CSAT is what matters the most to seniors of Sungjin High School. When the exam is just around the corner, one of the spheres drops on a military camp for the first time, and more shocking news awaits them.
When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.
Duty After School - Question the Spheres Synopsis and Schedule