(UNDER REWRITE) Arpeggio of Blue Steel: Ad Astra

"SIC ITUR AD ASTRA!"

It all began in the year 2039. Portals appeared across various parts of the ocean, unleashing numerous Kaiju that triggered massive tsunamis and claimed millions of lives. As the years passed, humanity developed a wide array of powerful weapons, some crafted from the remains or technology of these fallen invaders.

From this global crisis, the nations of the world united under a single banner: the United Nations Earth Attack Force (UNEAF) an organization forged from vengeance, determined to make the otherworldly invaders feel the full wrath of humanity.

By 2045, UNEAF had grown significantly stronger, developing superweapons such as the Sirens, Kansens, and Fogfleet. In this era, scientists discovered a new particle, smaller than a proton, known as "Mana." This breakthrough allowed humans to perform feats that defy physics, essentially granting them the ability to wield Magick. As a result, three distinct types of soldiers emerged:

Cultivators - Those who can harness Mana and train to master Magick.

Dominators - Non-magick users who surpass their limits through genetic mutation.

Liberators - Individuals fused with advanced technology to enhance their capabilities.

That same year, new portals began appearing, bringing more than just hostile creatures. Sometimes, they release seemingly innocent lifeforms. Other times, lifeless objects. And occasionally, beings so terrifying they defy human understanding. No matter what emerges, one rule remains: never let your guard down.

Driven by ambition, some humans dared to enter the portals, seeking new worlds to conquer. But not every portal leads to a land ripe for domination.
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A/N: This is an AOBS AU fanfic crossover, and an authors collab story.

This fanfic is written by an idiot.