4-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