A group of students from the Cosmo Academy are about to take their final exam: surviving for over fifty days in a derelict ship. But when they arrive, they discover that instead of ten students, there are eleven. One of them doesn't belong there. Written by
Did You Know?
According to translator Matt Thorn, in the revised edition of the manga, it is implied that there are female cadets, but that Tada's group is an all male group. In the original, it was implied that the academy accepted only males. Moto Hagio made this change for rather obvious reasons. See more