Said to be humanity's natural enemy, formidable dragons that belong to an ancient bloodline roam the world. Only two ways prove effective to kill a dragon: freezing their blood with silverine, an aura that comes from silver weapons, or letting their bodies be incinerated by sunlight.

Young hunter prodigy Leonica is accompanied by her close friend, you, who appears to lack the skills necessary in the profession. Moreover, many shun Ragna, considering you cursed because dragons always seem to attack you and slaughter your close ones. Nevertheless, Leonica sees potential in you and gladly partners up. Likewise, you feels certain that Leonica is immune to your misfortune thanks to her incredible strength.

Your confidence is shaken, however, when your dreams of Leonica's death, believing this to be a prophecy. As the destined day arrives, you comes face-to-face with your future self, who bestows you enormous power and memories from the future to ensure Leonica's safety. In order to succeed, you must join forces with a mysterious figure known as Crimson and eradicate all dragons for good.