Nil Admirari no Tenbin

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EP1 - The Glow of the Cursed Tome: Aura

In a Japan where the Taisho Era didn't end after 15 years but went on for another 10 additional years the eldest daughter of the financially declining Kuze family, Tsugumi, resolves herself to a marriage she doesn't desire for the sake of her family. However, Hitaki, her younger brother, vehemently opposes the marriage and after a fight with Tsugumi, shuts himself away in his room and attempts to kill himself. Tsugumi blames herself for her brother's suicide, but two mysterious men appear identifying themselves as part of the Imperial Library Intelligence Asset Management Bureau and reveal that her brother's suicide might not be as clear-cut as it seems.

EP2 - The Imperial Library Intelligence Asset Management Bureau: Fukurou

Books containing the intense emotions of the author, sometimes with the power to force the death of their readers, these books are known as cursed tomes . The role of the Imperial Library Intelligence Asset Management Bureau, nicknamed Fukurou, is finding and retrieving these books. As a result of the incident with her brother, Tsugumi has gained the ability to see the auras around cursed tomes and decides to join Fukurou to put her new powers to use. However, she finds Fukurou full of rather unique members such as Ozaki Hayato with a sharp-tongue and a strong sense of justice, Kougami Akira who has difficulty with people, and Hoshikawa Hisui with mismatched eye colors.

EP3 - Those Who Take the Name of the God of Flames: Kagutsuchi

Realizing that she could save many people with her powers, Tsugumi has begun her work as a member of Fukurou. However, when she is having a meal with Hayato and the others at the end of their rounds, they hear a ruckus outside. A group called Kagutsuchi appears that plunders books from citizens and burns them on the spot. Sagisawa Rui, a victim who had a precious book burned, asks Tsugumi for her help in resolving this problem. He says that rumors are spreading of strange books such as the one that caused the Prime Minister's son to commit suicide.

EP4 - Nightingale Ball: Nachtigal

As Tsugumi is slowly getting used to her new job with Fukurou, one day, she meets the Prime Minister's son, Ukai Shougo. Having nearly killed himself due to the influence of a cursed tome, Shougo has come to live at Fukurou in order to recover. While Shougo is rude and utterly selfish, Tsugumi finds herself concerned for him. Meanwhile, when a politician jumps to his death due to a cursed tome Fukurou learns that there may be some connection to the dark auctions held behind the scenes of an illustrious dance hall by an organization known as Karasu. Tsugumi accompanies Shougo in an undercover mission to learn more information.

EP5 - Akatsuki Evening: Lilac

When a number of female murder victims are discovered in Ueno Park with lilac flowers in their mouths and one of Shizuru's books by their side, rumor spreads that he may have some involvement in the case. Worried for her friend, Tsugumi learns that the murders seem to be inspired by a certain book where both Shizuru and Sasagoi-san have ties to the author. When Shizuru is taken away by the police for questioning, Tsugumi works with the rest of Fukurou to find the real killer before it's too late.

EP6 - Mother's Face: Kingfisher

While out on their rounds one day, Tsugumi and Hisui learn of the existance of a book written by a prostitute from Yokohama's redlight district. Hisui seems especially desperate to get his hands on this book and when Tsugumi learns the reason why she becomes determined to help him. When Tsugumi discovers that Shiginuma Shouko, wife of the shady owner of the Nachtigal dance hall, she finds herself stepping back into potentially dangerous territory alone.

EP7 - Movie Theater After the Rain: Tears

Tsugumi finds herself inadvertently going to a movie with Akira and is pleasantly surprised when sees a new unexpected side of him. Meanwhile, members of the House of Peers who support the Prime Minister's plan for disarmament are mysteriously dying and a Japanese-style book has been found by each of their bodies; the members of Fukurou begin to see a connection. One day, Tsugumi is suddenly confronted by Shiginuma Takashi, the supposed leader of Karasu, and he offers her a difficult choice.

EP8 - The Colors of the Flames of Love: Tragedy

Confessing to being the spy within Fukurou, Akira leaves after pledging to Tsugumi that he will protect her. Rattled by the revelation of his betrayal, the other members are unable to hide their upset. After leaving Fukurou, Akira heads straight for Shiginuma to angrily confront him for his threats to Tsugumi. Meanwhile, Tsugumi learns some surprising new information about cursed tomes from Nabari.

EP9 - Dance of the Evil Bird: Karasu

Hayato's friend from his college days and newspaper journalist, Yoshikiri Takuma, ends up trying to kill himself after reading a cursed tome disguised in the form of a mysterious letter planted in his bag from an unknown sender. He seems to have been targeted after getting too close to linking Karasu to the fake cursed tomes. With the help of Yoshikiri's information Fukurou learns of his suspicions regarding Karasu, but before they are able to make a move Tsugumi is taken.

EP10 - White-Walled Birdcage: Trauma

Tsugumi was abducted as she was returning to the apartment and taken to Nachtigal. Shiginuma Takashi tells Tsugumi that he will take advantage of her powers and have her bear his child to succeed him. Meanwhile, having ascertained that the fake cursed tomes are being made in Nachtigal, Rui and his Kagutsuchi companions infiltrate the grand building in order to put a stop to this. In the midst of the confusion, Hayato, Hisui, and the others make their way into Nachtigal to search for Tsugumi. During the search, Hisui comes face to face with Professor Mozuyama, who has conducted numerous human experiments.

EP11 - Mother, Father, and Child: Bond

Driven to make the fake cursed tomes out of a desire to be recognized, Sasagoi is moved to tears by Shougo's words of encouragement. Through a series of events, the true relationship between Akira and Shiginuma is revealed. However, Akira has found something he wants to protect himself and secures Shiginuma so he can be handed over to the police. The members of Fukurou track down the members of Karasu one after the other, but after Hisui fails to stop Professor Mozuyama, Rui finds himself facing down the cowardly man. Mozuyama shocks Rui with information about some truths about his parents.

EP12 - Bewitching Tales of the Imperial Capital: Nil Admirari

Fukurou has been able to apprehend all the members of Karasu and they celebrate the resolution of such a major case. Just as everyone has started to think things are returning to normal, Tokimiya, Mashiko and Hayato discover a disturbing detail about Nabari and the cursed tomes linked to many of their own personal tragedies. Unaware of any of this, Tsugumi has brought Nabari with her on a visit home to celebrate her brother's discharge from the hospital. Nabari lures Tsugumi and Hitaki into the Kuze family library under the pretense that there might still be another cursed tome there, but he locks the door with a dangerous glint in his eyes.

EP0 - TVアニメ「二ル・ニル・アドミラリの天秤」放送直前特別番組～ようこそ帝国図書情報資産管理局へ～