The anime series adaptation of Toaru Kagaku no Accelerator (とある科学の一方通行,Toaru Kagaku no Ippō Tsūkō?, lit. A Certain Scientific Accelerator) is a manga series that serves as a side story to the Toaru Majutsu no Index light novels, written by Kamachi Kazuma, who also wrote the original light novels, and illustrated by Yamaji Arata. It started a monthly serialization in Dengeki Daioh in December 2013. The manga series has been adapted into an anime series by J.C.Staff.