In the realm above Earth lies the Heavens, a series of floating island kingdoms sustained by the waning magic of their godlike dwellers. Fueled by Akuto, the mystical energy source essential to their existence, these realms face a looming crisis as this power diminishes. Amidst this dilemma, the majority of kingdoms opt for conservative Akuto usage to survive, except for the defiant Magical Kingdom ruled by the enigmatic Magical King Munto. Convinced that a girl revealed to him by a seer on Earth holds the key to restoring Akuto, Munto ventures perilously to the human world, risking the wrath of neighboring kingdoms vying for the remaining energy. Meanwhile, on Earth, Yumemi Hidaka grapples with her unique ability to see the celestial islands unbeknownst to others, causing doubt in her sanity despite her friend Ichiko Ono's belief. Dismissing Munto's sudden appearance as a figment of her imagination, Yumemi focuses on aiding her 13-year-old friend Suzume Imamura embroiled in a risky romance. With the imminent fall of the Magical Kingdom looming overhead, Munto's race against time to rescue both realms intensifies, intertwining the fate of the Heavens and Earth.