ANSWER

ANSWER is the opening theme for the Toaru Majutsu no Index PSP game sung by Kurosaki Maon. The B-side to Magic∞world, it was released on November 24, 2010 as part of a single. The video game released on January 27, 2011.

Characters
By order of appearance"
 * Kamijou Touma
 * Misaka Mikoto
 * Index
 * Shirai Kuroko
 * Misaka 10032
 * Sister clone
 * Accelerator
 * Last Order
 * Stiyl Magnus
 * Kanzaki Kaori
 * Tsuchimikado Motoharu
 * Misha Kreutzev
 * Itsuwa
 * Oriana Thomson
 * Mugino Shizuri
 * Kihara Amata
 * Kazakiri Hyouka

Trivia

 * Several scenes from the first season of Toaru Majutsu no Index are used in the opening.