Dragon Slayers

Ryu was coming back from town when he saw that his family has has been murdered, the only surviving person which was his sister was badly wounded and was dieing already. He then ran to a nearby healer house and kept his sister there, the marking in his sister body was strange. The healer then told him that his sister has been poisoned by the black dragon and was going to transform into a hybrid and if the transformation didn't workout she'll die. He learnt about the dragons and the dragon slayer guild. He then promised himself that he was going to kill the dragons and turn his sister to human Will he make it__