Také Kanazuki (age 16) found himself living with his grandmother after the sudden disappearance of his elder sister and the mysterious murder of his parents. With the great potential in power he has, his grandmother decided to enroll him into the Spectre Institute of Tokyo where he will hone his powers and skills to fight off the demon army. Here he meets new faces that will join him as friends and rivals. As all this is happening the demon army begin to make their moves and capturing the Blood Gate Crystals: A powerful shard capable of reforming existence.