The story is set in a world where supernatural powers exist through science, and magic exists through religion. <br /> <br /> ‘Academy City.’ 2.3 million inhabitants.<br /> 80% of the students are active in the ‘Brain Development Program’ and out of those only 7 are Level 5s.<br /> <br /> Diverging from the plot of Index, Toaru Kagaku no Railgun focuses more on Academy City and the third of seven Level 5 espers named Misaka Mikoto. <br /> <br /> Misaka Mikoto, despite being part of the most powerful espers in Academy City, also has a more carefree side to her life. She has to fend off constant &quot;love attacks&quot; from devoted friend and roommate Shirai Kuroko and she needs to maintain the image of being perfect as the Ace of Tokiwadai Middle School. <br /> However, with various problems arising in Academy City — both noticeable and out from plain sight — she moves as Academy City's unseen savior, using her powers to save people, loved ones and strangers alike.