In Drag-On Dragoon you must ride on the dragons to battle with troops of soldiers in the sky. The main character is Kaimu, the price of a small country, his parents were killed during the attacks from the ambitious empire. In order to save his country from the imperial invasion, he allied with the dragon and become the dragon dragoon, the emblem on his tongue is the symbol of the alliance.The second main character is Furiae, the princess and the younger sister of Kaimu, she was chosen by the goddess to become the guardian of the dragons and her country. She uses spells and prayers to protect the country, and she is also the key to world peace.There are both ground battles and air battles in the game. In ground battles Kaimu fights the enemies with swords, shield and arrows. In air battles, Kaimu must ride on the dragon and battle the enemies from both the sky and the ground, the dragon can also cast offensive and defensive magic.