It is said to be a natural enemy of humans, a strong dragon that is included in the ancient lineage roaming the world. Only two ways that have been proven effective to kill a dragon: freeze their blood with silverine – aura originating from silver weapons – or let their bodies be burned by sunlight. The miracle of young Leonica hunters accompanied by his close friends Ragna, who does not seem to have the skills needed in their profession. In addition, many are avoiding Ragna, considering that he was cursed because the dragon seemed to always attack him and slaughter close. However, Leonica saw the potential in Ragna and was happy to partner with him. Likewise, Ragna felt confident that Leonica was immune to her misfortune thanks to her extraordinary strength. His belief was shaken, when Ragna dreamed of Leonica’s death, believed this as a prediction. When the destination day arrived, he faced face with him in the future, which bestowed him a very large strength and memories from the future to ensure Leonica’s safety. To succeed, Ragna must join a mysterious figure known as Crimson and eradicate all dragons forever. ラグナクリムゾン