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戦う司書 The Book of Bantorra
In a world where dead people turn into books and are stored in the Bantorra Library where anyone who reads a book can learn their past. Bantorra Library is maintained by Armed Librarians who wield psychic powers and their enemy is a religious society known as Sindeki Kyōdan.
When 'Armed Librarians' launch an attack against a 'Church of Shindeki' ship they are attacked by 'Human Bombs'. After boarding the ship and fighting off the guards (the Mock Men), the Librarians find dozens of 'Meats' in the hold but are unable to save them all before the ship itself explodes. One of the few survivors is the Human Bomb, Colio Tonies who's only thoughts are of killing the Acting-Director of the Armed Librarians, Hamutz Meseta.
Colio and his companions find themselves at the Toatt Mine region still searching for Hamutz. However it isn't long before Lumion, a local Armed Librarian discovers that they are human bombs. In the ensuing confusion one of the bombs detonates killing Lumion and this in turn prompts Hamutz herself to head to the Toatt Mine to search for those responsible.
Colio is given another piece of the book of the Ever-Laughing Witch and he learns more about her past. He also comes face to face with the women he is supposed to kill but things do not go as he thought they would.
Hamutz and Segal finally face each other in battle but with Segal wielding Shlamuffen it doesn't seem like the Acting-Director has much hope of winning. Meanwhile, after learning more about Shiron's past, Colio decides that he too must fight.
Following the theft of Ylucklucu and Volken's apparent betrayal everyone at Bantorra begins to question his motives and his character. Mirepoch has been particularly affected by her friend's actions and seeks solace in the books of the lower libraries. Meanwhile, Norotei is dispatched to recover Lumion's book which has gone missing from the Toatt Mine.
A man who refers to himself a monster arrives at the Library and demands to see Hamutz. He is immediately confronted by Mattoalast, Minth and Mirepoch who manage to force him to retreat despite his numerous magical abilities. Meanwhile, Norotei is still investigating the theft of Lumion's book.
Norotei confronts Zatoh about his theft of Lumion's book and his suicidal tendencies. Zatoh tells her that she can have the book only if she can kill him. Meanwhile, Mirepoch learns that Zatoh maybe the monster who attacked the Library and dispatches Mince to investigate.
Norotei learns that Zatoh is a 'book eater', a monster who can devour books gaining the knowledge and power of the person concerned. When Zatoh consumes Lumion's book Norotei becomes so angry that she becomes serious about fighting for the first time. Meanwhile, somewhere inside of Zatoh's soul all of the books he has consumed begin to rebel against him.
With Enlike now in control of Zatoh's body he returns to Bantorra with Norotei to try and atone for his sins. Unfortunately, despite Norotei's affection for him many of the other librarians do not trust Enlike and things are only made worse by Ganbanzel's incessant hounding of his former protégé.
The Library comes under attack and it appears that an Armed Librarian is responsible, Mokkania Fluru. With Hamyutz trapped in the Labyrinth with the traitor the other Librarians regroup and prepare a counter-attack. However, it soon emerges that Mokkania is being manipulated into attacking the Acting-Director by the Church of Shindeki and that they must find a way to break their hold over him before it is too late.
With Hamyutz now in possession of Shlamuffen she decides that it is time to confront the treacherous Mokkania. Meanwhile, the reason for Mokkania's sudden attempt to kill Hamyutz becomes clear and it is not what any of the Armed Librarian's originally believed.
Mattalast reminisces about the first time he met Hamyutz and how they went from trying to kill each other to becoming lovers. He also remembers their mission together to capture the traitor Hiza, when he was order to eliminate Hamyutz by the then Acting- Director, Fhotona.
Mirepoch uses her day off to investigate an eight year old murder that may be related to Lasquall Othello. However, there is also someone else who is interested in the mysterious Lasquall and she is prepared to kill in order to find her man. When the two come face to face it is only thanks to Mattalast's timely intervention that Mirepoch survives.
Shiron, the Ever-Laughing Witch tells the story of how the world was created by the Overseer and the Library was founded. She then recounts the various events that have occurred up until now; Colio's defeat of Cigal, Volken's betrayal, Zatoh's redemption by Noloty, Mokkania's death and Mirepoch's hunt for the truth about Lasquall Othello.
Mirepoch continues to search for answers about Lasquall but her red-haired rival appears to be one step ahead of her. However, when she does finally get up to speed she realises that the only way to kill Lasquall is to work together with Alme.
Minth is assigned to retrieve illegal snuff books with the help of Yuri and Yukizona. However, Minth soon runs into an old friend from his criminal days, Griehn and is reminded of the last time he got involved with snuff books. He then begins to realise that Griehn has more to do with his mission than he first thought, forcing Mince to choose between his duty and his friend.
Volken finally returns to Bantorra after his apparent defection and attempts to prove his innocence. However, his return causes Mirepoch to question her decision to drink the water of Argax as her feelings for her former friend begin to return. Meanwhile, Enlike tries to help Renas make sense of her re-emerging memories.
Volken and Renas (now calling herself Olivia Litlet) defeat Volekn's former instructor, Vizac in order to escape to the Kra District. However, Hamyutz continues to pursue the traitors in order to destroy the secret of Vend Ruga once and for all. Meanwhile, the Armed Librarians learn that Vizac is dead and they all blame Volken for their comrade's murder, all except Mirepoch.
The Acting-Director has finally caught up with Volken and Olivia at the Duria Mine. As Olivia attempts to overcome an army of Human Bombs in order to locate Ylucklucu, Volken finally faces off against Hamutz. Although Volken is not strong enough or ruthless enough to defeat Hamyutz he succeeds in slowing her down but in process he is killed by Hamyutz. Olivia regains not only Ylucklucu, but also her memories as well.
Following the Meat's revolt against the Church of Shindeki, the Ismo Republic suddenly declares war on the Library of Bantorra and Hamyutz suspects that the severely weakened Church is somehow involved. Meanwhile, Enlike is delivered a book by Lasquall and when he starts reading it he is shocked to learn that it is Noloty's. He is even more shocked when he learns the circumstances of her death.
