Dreaming of the distant planets.

Fourth Tokyo, one of Japans new prefectures on Mars. Kirishina City, Fourth Tokyos special economic zone, is home to an elite corporation, renowned for its aerospace business - the Kirishina Corporation. The company runs a private school, the Kirishina Science and Technology Academy High School. There, the students report to the company after school to take part in a crucial project, the development of prototype variants for rockets. This is the Kirishina Corporations Advanced Technological Development Department, Educational Development Class, a.k.a. A-TEC. When a new student set to join the class is kidnapped en route to Mars, the A-TEC students embark on an unprecedented rescue mission.