Hisoyakana Yokubō ~Misaka wa, Hasseisase masu~

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Hisoyakana Yokubō ~Misaka wa, Hasseisase masu~ (ひそやかな欲望 ~ミサカは、発生させます~) is Misaka 10032's sung by the Sisters' Japanese voice actor Nozomi Sasaki.

It appears as the second track on the Toaru Majutsu no Index Archives 4, and was released on July 24, 2009.