Set in a vast cosmos filled with technology and Ether gear, the story begins on the deserted, mechanical planet Granbell. Here, Shiki Granbell, a young human boy raised entirely by animatronic robots, lives a peaceful life until the beloved robot ruler, Demon King Ziggy, passes away. Soon after, Rebecca Bluegarden, a bubbly B-Cube
content creator, and her cybernetic cat companion, Happy, arrive on the planet. When the local robots suddenly turn hostile to force Shiki off the dying world, Rebecca and Happy rescue him. Motivated by a desire to make friends across the universe and Rebecca’s dream of gaining galactic fame, Shiki joins them aboard their ship, the Edens Zero, embarking on an epic cosmic odyssey.Their primary quest is to locate Mother, the legendary goddess of the cosmos who is said to grant any wish. Along their journey, the trio recruits a colorful crew of outcasts, including the brooding gunslinger Weisz Steiner, the fierce warrior Homura Kôgetsu, and the android witch Sister Ivry. However, their adventures quickly turn perilous as they cross paths with the Interstellar Army and the notorious mercenary group known as the Elements 4. The stakes dramatically escalate when they encounter Drakken Joe, a ruthless alchemist and crime lord who possesses a terrifying grasp over time and life force, and who has a mysterious, fatal connection to Rebecca’s past.As the crew delves deeper into the galaxy’s secrets, shocking truths emerge regarding Shiki’s origins and his connection to the late Demon King Ziggy. The universe faces an
existential threat when an alternate-timeline version of Ziggy awakens with a ruthless agenda to eradicate humanity and conquer the cosmos, turning the mentor-figure into their ultimate adversary. To combat this apocalyptic menace, Shiki and his crew must unlock the true potential of their Ether powers and forge unbreakable bonds of friendship. They travel through alternate timelines and battle formidable mechanical generals, desperately fighting to alter a tragic future where Mother is destroyed and humanity is wiped out. Through intense interstellar warfare and emotional sacrifices, Shiki embraces his destiny as the new gravity-wielding Demon King. Ultimately, the crew of the Edens Zero must stand united against overwhelming cosmic odds, risking everything not just to find Mother and achieve their personal dreams, but to preserve the very fabric of time, space, and freedom for all living beings across the universe.