Scrapped Princess

Scrapped Princess (スクラップド・プリンセス, Sukurappudo Purinsesu) is a Japanese light novel series by Ichiro Sakaki and illustrated by Yukinobu Azumi, also known as the popular adult dōjin artist Nakayohi Mogudan. In 2003, it was adapted into an anime series produced by Bones.

Plot
The story takes place in what appears to be a fantasy world (revealed later to be Earth in the distant future) and revolves around a girl named Pacifica Casull, the sister in a pair of twins born to the royal family of a kingdom called Leinwan. Pacifica is abandoned at birth. The 5111th Grendel Prophecy predicts that she is the "poison that will destroy the world" if she reaches her sixteenth birthday. To prevent this, she is dropped off a cliff as an infant ("scrapped").