4-koma Koushiki Anthology: Toaru Kagaku no Railgun x Toaru Majutsu no Index Volume 01

The first volume of the 4-koma Koushiki Anthology: Toaru Kagaku no Railgun x Toaru Majutsu no Index anthology series was released on March 27, 2012. Namori, mangaka of YuruYuri, drew the cover image.