Pandora Seven summary:

In the beginning, there was a box. At the end of the forbidden millennium, the world was engulfed in hope and despair, and everyone said, "Never open that box."“I wish I could meet other humans.”That is the secret wish of Ria Frontier, who grew up as the sole human amid a veritable melting pot of other fantastical races on a small island. As she prepares to celebrate the turn of the thousand-year cycle, that wish is granted—in the form of a war party of humans that arrives on a flying ship to ransack her home and hurt her friends and adoptive family in search of “Pandora’s Box.” Pushed too far by the cruelty of her race, Ria somehow manages to unseal the terrible power of what the humans have been looking for, unleashing a tragedy that will change her life forever... Can the girl, Ria, thwart her twisted fate? The apocalypse fantasy of hope and despair, begins!