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.
"A 4-koma Anthology of "Toaru Kagaku no Railgun" × "Toaru Majutsu no Index" has been introduced!"
The daily life of Mikoto and others depicted in 4-komas. Railgun × Index anthology is drawn by gorgeous artists. Enjoy the Academy City full of fun as it's an anthology!