Introduction for Dark Beauty

Kayla and Layla beleive they are regular twin sisters with major different personalities. But one day they find something like wings on their back, Kayla's white and Layla's black. To them it's weird and fun. But after having strange dreams and marks on their bodies, nothing is at seems anymore as they realize they are the sole saviors to their ancient race, beleived to be extinct. And what does the appearence of a beautiful mysterious boy mean?