A drama CD was released as a mail-in order of Dengeki hp volume 48[43] and was released later in November 2007. There are two parts to the story: the first part originally aired as a radio drama in Dengeki Taishō and starts with an encounter with the mysterious self-proclaimed "former" magician by Tōma Kamijō and Index in the family restaurant after Misaka decides to go back due to urgent business. The second part is about Mikoto Misaka and Kuroko Shirai with their "urgent business", and a duel request by a Level 3 Psychic girl from Tokiwadai.[44]