This martial-arts infused story follows nine-year old Kyuta, as he stumbles into an alternate dimension where beasts roam wild. He trains for battle under the bearlike warrior, Kumatetsu and the pair foster a deep student-teacher relationship. When Kyuta finally returns to the human dimension he meets Kaede, a young girl who teaches him how to read. Caught in between two worlds, Kyuta is faced with the challenging decision to choose where he must remain.