A Certain Magical Index

Set in a technologically advanced city with superhuman students, but also in a world where magic is also reality. The right hand of Kamijo Touma, the Illusion Breaker (Gensou Goroshi), is able to "negate" all magic, psychic abilities, and divine power. One day, Touma finds a little girl on his terrace and discovers that she is an Anglican nun whose memory has been "implanted" with the Index-Librorum-Prohibitorum—all the prohibited books that Christian churches have banned from circulation.