Shortly after the loss of his parents, Ayu Mayuki becomes adopted by the headmaster of a magic school and starts his new life attending the academy. Out of the four elemental tribes, he becomes placed in the fire tribe and works his way through his studies learning the different elements and about the seven deity dragons. Legend has it, when receiving a kiss by a dragon, a blessing is given and a deity’s key is given to the chosen user. Little did Ayu know, he was already a bearer of a key since his birth. Where did the key come from? Who bestowed it to him?