Midway through summer vacation, 36 students, some with newfound super-powers, find themselves all alone in their high school, adrift in a black void, unable to contact the outside world. Some students try to impose order, but are faced with opposition.

Nagara attends the opening ceremony of his technical school, but feels out of place. He sees Mizuho leaving her all-girls' school, but she brushes him off. He recalls what happened after blasting off into space, questioning if he ever really went adrift.