A spaceship crashes through a black hole into another universe and dumps 300 people on an alien world. Twelve years later, the survivors' kids inherit a planet that's actively trying to kill them. This is hard sci-fi adventure dressed as mecha action, where every discovery about Ismo rewrites what survival actually means, and the stakes compound because there's nowhere else to go.
Twelve years ago, a generation ship fell through a black hole and crash-landed on Ismo, a planet in an alternate universe. Now the survivors and their children must navigate a world shaped by ancient mythology and modern technology. A comet called Yomi approaches regularly, bringing with it the threat of Yamatano Orochi, an eight-headed monster that once nearly destroyed this system's entire civilization. Young Takeru emerges as humanity's unlikely hope. Armed with advanced mecha technology salvaged from the wreckage and guided by the fragmented knowledge of old wars, he discovers that Ismo's fate is deeply intertwined with legends spoken of only in broken records and fading memories. The line between past and present, between god and machine, begins to blur as the threat returns. What unfolds is a race against time where Takeru must master both forgotten ancient powers and futuristic combat systems to protect humanity's last refuge. The story weaves together survival, destiny, and the question of whether history is truly condemning itself to repeat.