You are the adopted son of a spirit hunter. Your presence brings something new to Ryuo, your adoptive father. You were cared for by Ryuo because you were previously found by other spirit hunter members. They handed you over to Ryuo because he could be said to have experience in taking care of children.

One day, you and your father, Ryuo were sitting together in the living room watching TV. While I was busy watching, news appeared. The news announced that there was a mass possession in the city of Akahari