Arata: The Legend

Arata: The Legend (アラタカンガタリ 〜革神語〜 Arata Kangatari), a Japanese manga written by Yuu Watase that began serialization in the manga magazine Weekly Shōnen Sunday in 2008. The first volume of the series was released in Japan on January 16, 2009. The series has seventeen volumes and is still serialized in Shōnen Sunday. The series is Watase's first shōnen series. It is licensed by Viz Media as part of their Shōnen Sunday imprint.

Plot
Every 30 years, a new princess is chosen from the Hime family to serve the Hayagami. The time has come again, but over these past years, records state not a single female has been born, save for one, the 15 year old Arata. The only problem is, Arata is actually a male! Forced to disguise himself and take the place of the princess candidate until a formal one can be found, he attends the festival only to witness the current princess, Kokuri-hime, murdered, and his own life is forfeit as well, by the hands of the princess' personal guard, the 12 Shinshou. As he runs for his life, Kannagi of the 12 convinces everyone that Arata is the one who has murdered the princess instead, and now everyone in the Imperial Court is after his head!