Akatsuki no Yona

Yona of the Dawn is a Japanese manga series written and illustrated by Mizuho Kusanagi. The story commences with Yona, the sole princess of Kouka, ruled by her pacifistic father King Il under the Sky Tribe. Yona lives a lavish, sheltered life from the harrowing reality outside of the walls of the Crimson Dragon Castle, protected by her bodyguard Hak, general of the Wind Tribe, and often visited by Su-Won, her crush of 10 years and the son of King Il's brother, Yu-Hon. But contrary to this peaceful illusion, Kouka is once again on the verge of destruction and about to undergo a political upheaval.