Planet Ladderプラネット・ラダー ; Puranetto Radā

From Tokyopop: Kaguya is the orphaned survivor of a war she can't remember. She has grown to love her new life and the parents who have adopted her, until once again, her life is torn away from her. A boy she remembers only in her dreams comes to Kaguya and gives her the truth ... that she is a princess from another world...