To Aru Majutsu no Index (A Certain Magical Index) is a anime series adapted by studio J.C. Staff, based on a light novel series set in a fantasy world where supernatural powers exist through science, and magic exists through religion. Kamijou Touma's right hand, the Imagine Breaker, will negate all magic, psychic, or divine powers, as well as his own luck. One day he finds a young girl hanging on his balcony railing. She turns out to be a nun from the Church of England, and her mind has been implanted with the Index Librorum Prohibitorum - all the magical texts the Church has removed from circulation. His encounter with her would lead him to meet others from the secret world of science and magic, and an adventure with his friends where Science and Magic collide. (Wikipedia description)