In a not-so-distant future, Earth and space are in constant conflict, and two childhood friends, Mikako and Noboru, find themselves separated by intergalactic war. Mikako, a brave and determined young woman, is sent aboard a spaceship to fight against an alien race that threatens humanity's peace. From her distant position in space, the distance separating her from home and Noboru becomes overwhelming.
While she battles in cosmic confrontations, Noboru remains on Earth, trying to lead a normal life while attending to the calls of his heart. As the years go by and the struggles continue, their communication takes place through text messages, ranging from youthful love and hope to the despair of time slipping away. Noboru's anguish over not being able to be by Mikako's side intensifies, while the interference of time and space distorts their relationship.
With a captivating visual style, this melancholic tale explores sacrifice, connection, and the uncertainty of the future. Through stunning animation and an intimate narrative, the characters face the reality of war, love, and fate. Though separated by vast distances, the bond between Mikako and Noboru defies time and space, reminding us that true relationships can endure even in the most adverse circumstances.