Taking place in an alternate reality where a short-period comet called Charlotte passes near Earth once every 75 years. As this happens, it spreads dust onto the Earth, which causes a small percentage of preadolescent children who inhale the dust to manifest superhuman abilities upon reaching puberty. In Japan the story follows you, who awakens your ability. Although hoping to use your ability to fraudulently live a carefree high school life, your is unexpectedly exposed by Nao Tomori, a girl who can make herself invisible to a specific target. She forces you to transfer to Hoshinoumi Academy and join its student council, of which she is the president. Also on the student council is Jōjirō Takajō, a boy who can move at uncontrollably high speeds. The student council's main objective is to ensure the safety of ability users from organizations who seek to exploit their powers. In doing so, the student council warns ability users of the potential danger of using their abilities openly.

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