Toaru Majutsu no Index Archives 4

The Toaru Majutsu no Index Archives 4 (「とある魔術の禁書目録」アーカイブス 4) is the fourth audio drama/character song set released for the first season of the To Aru Majutsu no Index anime. It was released by Geneon on August 21, 2009 and contains two character songs and an audio drama.