In a world where science clarifies supernatural powers. In a huge college that has power development in its curriculum. To a resident high school student, Kamijou Touma, a pure white sister appears. She calls herself "Index" and says that sorcerers are chasing her. Thus, Kamijou Touma enters the world of the occult.
This is not an anime for everyone. But if you are into anime's with supernatural powers then I suggest you give this one a try. One reason why I truly love this anime is because of the characters, I completely adore Touma and Misaka. Then Accelerator is really cool too. The animation is outstanding. Fight scenes are awesome and really great comedy too. The story is a little rushed, but don't let it bother you, if you focus well then you will really enjoy it.