High school student Anon Kisaragi awakens to precognitive abilities. His predictions are so accurate that they frighten people. He becomes the target of resentment from a classmate whose family was killed in an accident he predicted, and he becomes isolated in his class. However, this is only the beginning of the gears of his destiny. One day, space suddenly rifts within the school, and Anon is attacked by a mysterious group that calls him "Engage." He is saved from this desperate situation by a group in military uniforms. They, too, are people who have come from another dimension, seeking Anon. What does Anon Kisaragi's existence as "Engage" signify? And can he avoid the despairing future he predicted?