One day， serial disappearance is occurred. An empress Medusa who dominates parallel world， has kidnapped students from another world. Shizuka tries to capture a kidnapper who escaped to the crack of space-time， but she accidentally crushes to another herself from parallel world. She merges into another herself and gets special ability. Shizuka fights with the kidnap organization Bogeyman as a superheroine “T Frontier” (she was inspired by the illustration that a student wrote). Empress Medusa sends a monster Dagon to defeat Frontier. Is Frontier able to save students!?