A Certain Magical Index

とある魔術の禁書目録

Touma Kamijou lives in Academy City, a metropolis where students are trained as espers with measured psychic powers. His own right hand carries Imagine Breaker, an ability that cancels any power it touches and, with it, his luck. His ordinary misfortune ends the day he finds a nun named Index draped over his balcony railing, her mind crammed with 103,000 forbidden magical texts that draw the world of sorcery down on him.