Worlds...
     They are places where the people and creatures of the Universe inhabit in great numbers. There were many of those spherical-shaped places, possibly more than one could imagine.
All of them had keyholes that linked to Kingdom Hearts, but most did not know that there were others linked to the the very centers, the hearts, of the worlds.
     There in the core of a single world lies Light and Darkness, intertwined...
     Both were balanced to keep the worlds stable. The balance kept inhabitants at peace and harmony...
     That balance didn't last.
     The intertwined powers were disturbed by Ansem and his unholy crusade towards Darkness. Worlds collapsed and were destroyed. Chaos prevailed. After the events with Sora and gang, the worlds were restored and brought back into the Universe. Because of a fear of the return of Darkness, a knight, the Light of all Worlds, was sent to fill worlds with constant Light. However, the scales were tipped.
     Darkness struggled against Light.
         Imbalance.
     Soon a teenager is to find out that what she calls her curse becomes her very gift. As the Darkness of all Worlds, she joins the knight into saving the Universe. But little did they know what was in store for them, and their journey twists their partnership into forbidden love...