Toaru Majutsu no Index SS: Necessarius Special Admission Test

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 an upcoming light novel written by Kamachi Kazuma, to be released in parts in the limited editions of the Blu-ray and DVDs of the Toaru Kagaku no Railgun S anime.

The story revolves around the Amakusa-Style Remix of Church being tested by the Church of England to become part of it.

Chapter 1
After the events of the Orsola Aquinas Rescue Arc, the Amakusa Christians are eager to join the Anglican Church, and be under their protection from the Roman Catholic Church.

After being briefed of the rules and goals of the Necessarius Special Admission Test by Freadia Strikers, they begin their test in Necessarius' Underground Labyrinth, the prize for their passing of the test would not only be their inclusion into the Church's ranks but as well having the privilege of a free pass that allows them to access Necessarius facilities that are otherwise are locked by magic barriers.

However, after Itsuwa and Tsushima came upon a Cursed Corpse Wax trap in the underground labyrinth, Tatemiya Saiji informs them that their communication with Freadia has been intercepted by a fake, while the real Freadia's communication has been intercepted by fake Amakusa Christians. Immediately, they become aware of the fake Freadia and the fake Amakusa Christians, to obtain the free passes to Necessarius' facilties, which hold powerful spritual items and grimoires.

They get out of the labyrinth but know that their troubles have just begun as now the Church will suspect and target them, knowing that only they can hunt down the fakes and clear their names. Meanwhile, Freadia discovers the communication spiritual item has been tampered with remotely, and believing that the Amakusa are the cause, reports to her higher-ups that they are her suspects. She is then ordered to take them down.

Chapter 2
And thus the Freadia gathers his ilk to hunt down the betrayers, the Amakusa. She meets up with Flack Anchors and his subordinates, and makes no attempt to research him. However, she does question their objectives as a tests, and though he shows that he believes that the "Amakusa's" target is the city library where grimoires are hidden, Freadia notices that he has a reply that is unbecoming of a specialist.

Meanwhile, the Amakusa themselves are on the move, hiding from the Anglican Church, they concluded to clear their name as fast as they can as Church and their enemies will not. And so, they go towards the library, which they believe is the likeliest target by the pretenders with their free passes to infiltrate. They steal a truck and rush towards there, foiling Torquay Shadowmint's, of Necessarius, attempts to destroy as they drive pass a hospital.

Back with Freadia, she and Flack, believing that the fakes are there arrive at the library, but already she notices that the traps have not been disturbed. She takes a look at the repair and finds no one there, but then she is struck down by Flack. There, the betrayal is shown, and that Flack and his subordinates were the pretenders and the person Freadia spoke to in her cursed crystal radio was pretender as well. She is felled by them with their magic rifles.

The Amakusa arrive and see Freadia bloody but alive on the floor, and they are then engaged in combat, injuring several of them with Flack's rifles. They are forced to retreat to contemplate and mull over their tactics. But when their time was almost up, Itsuwa charges towards. Seemingly outnumbered and overpowered by Flack's group they use their rifles to attack, but Itsuwa uninjured, for she struck her spear on to the floor to make a sound. There, it is revealed that their weapons use the sound the target hears to injure them, and quickly Itsuwa charges. The subordinates try to defend Flack, but it is too late, for Saiji and the others have sneaked away and crashed a book case on their heads.

Now then, they discover that the grimoire the group was after was the Necronomicon, a fictional one, but then defictionalized by a magician. There, they also discover that Flack was bleeding, and now they see that he had read the book and that it was a true grimoire, and that he has sent forth it to parts unknown using the sound of his magic rifle. Meanwhile, near Westminster Abbey a trucked is parked. Inside, several people fall down after hearing of the contents of the Necronomicon, and there efforts were not vain, for it was then collected and made a whole again into grimoire, and now a mysterious person now holds in his hands.

Chapter 3
The Amakusa is in the process of healing their injured. There they wonder what they could've transmitted through their sounds, and Itsuwa suggest they analyze the inconsistencies  They deem that the group that attacked the Anglican Church may have done this previously, With this in mind, they need to find out of magicians with records regarding teh Cthulu mythos and the Necronomicon. Seeing this, they need to sneak into an Anglican Church facility to get to some records. Knowing that Necessarius will eventually arrive in the library and take away the bodies of their enemies, Itsuwa has a plan. Basing the model off the Corpse Wax back in the underground, Itsuwa makes a dummy body that looks like Flack Anchors, and enters it. She takes the crystal of the radio that Freadia uses and switches it with their own to allow her to communicate with the other Amakusa.

With that, Freadia comes to and discovers that she has been treated. She begins to doubt Amakusa's role but still suspects them. She orders the personnel to take the bodies of Flack and his comrades to the Sword Sanctuary facility in order to find out their goals, despite the facility being inadequate for the task. As a person there tries to open up Flack, Itsuwa bursts out of it and knocks him unconscious. After she ties him, she goes to its "morgues," a large room where they keep records. With time of the essence, Itsuwa searches for anything related to the Cthulhu Mythos and the Necronomicon. Here, she discovers incidents that are vaguely related to the tales of the Mythos, but one incident strikes out the most. An incident in the Atlantic where the American crew all went insane, a bizarre ritual to call upon the underwater dead city of R'lyeh where the Great Old One Chulhu sleeps. It was merely an attempt to gain inspiration for their magical research, and the main culprit of this was a man named Arlands Darkstreet of the magica cabal Dusk Waiting to Awaken.

Meanwhile, Freadia discovers that her crystal is a fake, and discovers the tied up body of her comrade. Rallying him and the personnel there, she goes to the room of records. Itsuwa is aware of this as well for she felt pain in her temples, an indication that the crystal radio they used for their communication has been discovered. As the personnel tries to bust into the room, Itsuwa sets up a trick with a Mandala, an illusion spell upon a desk to confuse Freadia. And from there, Itsuwa injures herself in order to force them to heal her in order for her to get her crystal back. When the Necessarius personnel enters they find Itsuwa's unconscious body. Freadia falls for the illusoin magic, believing it to be her crystal which she cannot get back, and since it is cursed, she is forced to take care of Itsuwa until she wakes up in order to get the information she needs to get her crystal back.

When Itsuwa comes to, she finds herself strapped on a bed with Freadia on top. Itsuwa easily tells her where the real crystal (in Itsuwa's pants pocke) is and how she was fooled thorugh the Mandala spell. Freadia reminds her that she is no longer of use, but Itsuwa convinces her of the logical inconsistencies of their apparent guilt, and tells her of Arlands Darkstreet. Hearing this, Freadia acquiesces to believe her, but she is forces Itsuwa to wear a collar in order for her to not be able to escape.

As they sneak away to leave and enter commandeer a vehicle, Freadia shows her distrust of Itsuwa once more, and plans to kill her outside as killing her in the Sword Sanctuary when she was defenceless would cause too much problems. However, the Amakusa girl has reveals a trick up her sleeve and escapes into a sewer, with the other Amakusa waiting for her. Freadia tries to make pursuit and kill Itsuwa with the cursed collar but is once again fooled by the Amakusa. She looks down on the strange markings down the manhole and sees that it is similar to the Mandala spell from before. There she believes that the Amakusa might've analyzed her crystal while she was unconscious and that if she uses the crystal radio the spell might backfire on her.

In the sewers, the collar on Itsuwa's neck is destroyed, and there they begin to hunt down Arlands Darkstreet and the Dusk Waiting to Awaken.

Characters

 * Tatemiya Saiji
 * Itsuwa
 * Tsushima
 * Kouyagi
 * Isahaya
 * Ushibuka
 * Orsola Aquinas (mentioned)

New characters

 * Freadia Strikers
 * Flack Anchors
 * Torquay Shadowmint
 * Arlands Darkstreet