Toaru Majutsu no Index SS: Necessarius Special Admission Test (とある魔術の禁書目録SS -『必要悪の教会』特別編入試験編?) or Toaru Majutsu no Index: Necessarius SS, previously known as Toaru Majutsu no Index SSS is a story written by Kamachi Kazuma, released in parts in the limited edition DVDs and Blu-rays of the Toaru Kagaku no Railgun S anime. The individual parts were later collected into Toaru Majutsu no Index: Gaiten Shoku Light Novel Volume 01 alongside Toaru Majutsu no Index SS: Kanzaki and Toaru Majutsu no Index: Road to Endymion.
The story revolves around the Amakusa-Style Remix of Church being tested by the Church of England to become part of it, but later changes with the Amakusa being involved in a conspiracy after conspiracy being piled up on top of one another, forcing them to not only clear their name but aid in stopping the various conspiracies happening around them.
By order of appearance