six crimson cranes - By Elizabeth Lim

Shiori'anma, the only princess of Kiata, has a secret. Forbidden magic runs through her veins. Normally she conceals it well, but on the morning of her betrothal ceremony, Shiori loses control. At first, her mistake seems like a stroke of luck, forestalling the wedding she never wanted. But it also catches the attention of Raikama, her stepmother.

A sorceress in her own right, Raikama banishes the young princess, turning her brothers into cranes. She warns Shiori that she must speak of it to no one: for with every word that escapes her lips, one of her brothers will die.