Yū begins his life as a member of Hoshinoumi Academy's Student Council, whose job is to ensure the safety of students with supernatural powers. Their first job leads them to Nanba High School, where they catch a student named Udoh using his ability to produce x-ray photos of girls in their underwear, selling them for a profit. The next day, Nao takes Yū to see her big brother, who had been experimented on for his ability to manipulate sound waves, leaving him emotionally destroyed. Nao further explains that thanks to a person she trusts, she was able to escape the school that experimented on her brother and bring him to a friendly environment.