In the year 2176, most of Earth's population is wiped out by deadly radiation from a supernova. That was the "First Wave" but a second wave of slower moving ejecta is on the way. To prepare for the life threatening blast, mankind erects space stations which are designed to generate a force field to protect the Earth. As the year 2356 rolls around, the "Second Wave" is on its way and players take the role of a teacher who prepares space cadets such as Katase Shima for the coming storm. Over a period of one month, provide guidance and advice to your young charges so they can in turn protect the Earth and save humanity. Piloting and attack skills may be taught to students while general interaction commences with the other characters in the game.