Terror in Resonance Filler List

In an alternative iteration of the present, two teenage boys who go by the names Nine and Twelve, steal a prototype atomic bomb in an apparent terrorist attack. Calling themselves "Sphinx", they upload a video onto the Internet and threaten to destroy Tokyo city unless a cryptic riddle can be solved. They are survivors of a secret experiment by the Rising Peace Academy to develop orphaned children with Savant syndrome into human weapons. They befriend Lisa, a lonely schoolgirl, who becomes caught up in their plans to expose the nefarious activities of the organization.