Ichirou is a young boy who has been protecting his younger brother, Jirou, from the Drax—creatures that threaten humanity. One day, after being attacked by a Drax and pushed into a desperate, helpless crisis, the Teras Foundation appears before him—an organization that connects humanity and fights back against the Drax. The foundation utilizes the power of the wolf monster—Lycan. Witnessing this overwhelming power, Ichirou throws himself into battle in order to protect his brother…