Wind Voice Master Volume 1

(Part manga) Long time ago, God sent down an angel who've brought six colored pearls down to Earth, where there was chaos. Magically, the pearls turned into angels. They defeated the two fallen angels who were also born out of pearls. After they had done so, they turned back into pearls. But why?
No one knows.
But four of them were broken because they couldn't survive in the environment around them. The rest were lost. Then God sent the pink pearl down as she transformed into and angel. She managed to find all of the eight pearls. She grant each unbroken pearl a power, before her time was up and she turned back into a pearl.
So up to this day, the pearls are still alive, creating descendants.