Toaru Kagaku no Dark MatterToaru Majutsu no Index Gaiden - Toaru Kagaku no Dark Matter; とある魔術の禁書目録外伝　とある科学の未元物質; A Certain Scientific Dark Matter; Некая Научная Темная Материя

The tenth manga series based off of Toaru Majutsu no Index. An original side story written by Kamachi Kazuma and illustrated by Kisaragi Nankyoku, it focuses on the past of the Level 5 Kakine Teitoku. ---