Scrapped Princess
From Tokiopop: Fifteen years ago, the King of Linevana had a couple of twins-girl and a boy. Soon after her birth, the prophecy predicted that by the time the girl would be 16 years old, it would lead to the end of mankind. To avoid this terrible fate, the king ordered to get rid of the princess ... lay! She miraculously survived and was raised from the kingdom that would kill her. But now she turned 15 years old, and the royal guardsmen learned that she was still alive ... and decided to finish the work!