The narrative unfolds on the planet Destiny, which claims to be the Universe's center and houses all terminals of the Galaxy Railways. The protagonist, Yuuki Manabu, aged 20, follows the will of his deceased father and brother by joining the SDF (Space Defense Force) to safeguard the Galaxy Railways. The SDF upholds the reputation of maintaining the finest transportation schedules in the Universe, handling accidents, natural disasters, rescue missions, and space pirates along every railway line. Layla Destiny Shura is a mysterious beauty who unifies the SDF and all lines of the Galaxy Railways.
She has the power to see the destinies of planets, humans, and living beings. Despite this ability, as a "Guardian of Destiny," she cannot inform passengers leaving the station about the difficulties ahead. However, the appearance of those who use evil powers to alter the travelers' destinies triggers another hidden ability within her. "Destiny is changed by the individual themselves. Tomorrow's happiness is seized by the individual's own hands." How will Layla perceive Yuuki's destiny? And how will Yuuki confront his fate as the greatest crisis approaches the Galaxy Railways?