Seikoku no Dragonar

Japanese Title: 星刻の竜騎士

English Title: Dragonar Academy

Plot
In a land of dragons, citizens called breeders train their dragon pals. Races of dragons are born from breeders who are marked with Seikoku, also known as star brands.

Learning to ride and tame dragons comes easy to most students at Ansarivan Dragonar Academy — except for Ash Blake, a first-year student who is known by his fellow classmates as the "number one problem child." Poor Ash is the laughing stock at school because, despite his unfashionably and unusually large star-shaped brand that marks him as a future dragon master, he has nothing to show for it. His dragon has never appeared.

Until now, that is. One fateful day, while challenging fellow student, princess Silvia Lautreamont, to a dragon race, Ash's dragon awakes in full glory, but appears in a different form than any dragon ever seen before - a beautiful girl! Ash names her Eco, what's worse, he soon discovers that this new dragon has attitude to spare, as she promptly informs him that she is the master, and he, her servant. Ash's problems with dragon riding have only just begun.