In the era of Ad Stella, where corporations dominate
space exploration, Suletta Mercury, a shy girl from the remote planet Mercury, arrives at the prestigious Asticassia School of Technology. She pilots Aerial, a mysterious mobile suit developed by her mother’s company, Vanadis. Suletta’s life is instantly transformed when she inadvertently wins a duel against Guel Jeturk, the arrogant heir of the Benerit Group. This victory earns her the title of "Holder" and an unwanted engagement to Miorine Rembran, the
rebellious daughter of the Benerit Group’s chairman.As Suletta navigates the complex social hierarchies of the school, she discovers that Aerial harbors a dark, sentient technology known as GUND-Format. This prohibited tech, which links the pilot’s nervous system to the machine, caused a catastrophic massacre years prior, leading to a corporate purge of the Vanadis Institute. Suletta’s mother, Prospera, manipulates events from the shadows, grooming Suletta to weaponize Aerial’s power while seeking revenge against the Benerit Group for destroying her past.The political landscape shifts violently as the series progresses. Miorine attempts to escape her father’s control by founding GUND-ARM, a company dedicated to utilizing GUND-Format for medical purposes rather than warfare. However, the corporate factions, fueled by greed and deep-seated grudges, force Suletta into increasingly lethal combat. The lines between student rivalries and interstellar warfare blur, forcing Suletta to confront the brutal reality that her beloved Aerial is essentially a killing machine designed for vengeance.Tensions culminate when the Benerit Group’s hegemony collapses, triggering a brutal power struggle. Suletta must reconcile her gentle nature with the necessity of combat, eventually realizing that her mother’s orchestrations have turned her into a pawn in a larger game of cosmic retribution. As the "Quiet Zero" project threatens to rewrite the rules of humanity’s existence in space, Suletta and Miorine must forge a genuine bond to dismantle the cycle of violence. Their journey is a harrowing exploration of trauma, corporate exploitation, and the burden of legacy, ultimately questioning if technology should serve the advancement of humanity or become the instrument of its final, tragic destruction. Through loss and betrayal, Suletta evolves from a naive outcast into a beacon of hope amidst a cold, mechanical galaxy.