After discussing the incident with Misora, Subaru meets a professor named Orihime. She explains that Cepheus's activity on Earth recently awakened the EM wave residents (UMAs) of the lost continent Mu. Mu was sealed with an extremely powerful EM wave being within it, and the UMAs wish to break the seal in order to release the being. But to do so, they require three ooparts—one of which is the sword stuck in War-Rock's stomach—and Orihime hopes to cooperate with Subaru in order to retrieve the ooparts first. Suddenly however, a mysterious new enemy named Burai attacks the university and assaults Subaru...