4-Koma Koushiki Anthology - Toaru Kagaku no Railgun x Toaru Majutsu no Index4-koma Koushiki Anthology: Toaru Kagaku no Railgun x Toaru Majutsu no Index; 4-koma Official Anthology: Toaru Kagaku no Railgun x Toaru Majutsu no Index; 4コマ公式アンソロジー とある科学の超電磁砲×とある魔術の禁書目録; A Certain Magical Index X A Certain Scientific Railgun; Official 4koma Anthology - Railgun and Index; To Aru Majutsu no Index X To Aru Kagaku no Railgun 4Koma Anthology; Toaru Majutsu no Index - 4koma Koushiki Anthology; Toaru Majutsu no Index X Toaru Kagaku no Railgun 4Koma Anthology