Miyuki Takara—a bespectacled girl whose kindheartedness took her a thousand miles into the hearts of all her friends.
Several years ago, Miyuki had a dream. The dream told her that she wasn't normal girl. She was, in fact, something quite extraordinary, something nearly boundless. Miyuki was what the stars called a Millennium, like a thousand years, an ascended being whose gift lied in protecting the universe from evil.
Beyond our universe, evil breathed. Evil slept. Evil waited. Evil attacked. Millennia existed to keep that evil at bay, just as Miyuki did several years ago when her powers awakened for the first time. She was in a classroom at her high school—her classroom—with Tsukasa Hiiragi, the younger fraternal twin sister of her friend, Kagami. The entire classroom fell into a dimensional rift and detached from the rest of the school, only to reappear up in outer space, five miles beyond Earth's stratosphere. It was there that Miyuki transformed into an astral giant and faced a great serpent, which the stars of Millennia past called The End. It was there that Miyuki Takara saved the universe from being swallowed by the serpent.
Of all the people in the classroom who witnessed Miyuki's great act of heroism that day, only one of them retained their memories. It was that one person in whom Miyuki could sense the sleeping power of a Millennium.
That person was Tsukasa Hiiragi.