1화

1년 전, 전 세계 상공에 미확인 구체가 낙하했다. 국가총동원령이 내려진 대한민국, 수능가산점을 받기 위해 고3 학생들은 동의서를 쓰고... 그렇게 ‘방과후 전쟁활동’이 시작된다!

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.