In order to prevent global warming, Tokyo has transformed into a forest city, but it is not an ideal paradise (Shangri-La)...
Under the influence of "global warming," the near-future "Tokyo" has evolved into a tropical metropolis! In this Tokyo, now covered by a vast forest, privileged citizens reside in the tower-like stacked city of Atlas, while commoners live in fear of violent storms on the ground and the threat of sinking foundations. In the dangerous jungle-like forest, the 18-year-old protagonist, Kokuko Kitajou, participates in an armed guerrilla group. To achieve a future where everyone can live happily, she challenges the government army, which carries out unilateral "forestification" and ignores the plight of civilians, with honesty and a giant boomerang made of carbon fiber.