Dragonar Academy.

In a land of dragons, where citizens called breeders tame their dragon pals, races of dragons are born from breeders who are given a Seikoku: a dragon star-shape brand. Learning to ride and tame dragons comes easy to most students at Ansarivan Dragonar Academy — except for first-year student Ash Blake, who is known by his fellow classmates as the "number one problem child".