Telling ghost stories is a favorite past time of Mai Taniyama and her friends—that is, until she meets 17-year-old Kazuya Shibuya, the man sent by Shibuya Psychic Research Center to investigate paranormal activity at a supposedly haunted school. When Mai gets caught in a dangerous situation, she is rescued by Kazuya's assistant. Saving her lands the assistant incapacitated, and Kazuya demands that Mai become his assistant, instead...

The Diclonius, a mutated homo sapien that is said to be selected by God and will eventually become the destruction of mankind, possesses two horns in their heads, and has a "sixth sense" which gives it telekinetic abilities. Due to this dangerous power, they have been captured and isolated in laboratories by the government. Lucy, a young and psychotic Diclonius, manages to break free of her confines and brutally murder most of the guards in the laboratory, only to get shot in the head as she makes her escape. She survives and manages to drift along to a beach, where two teenagers named Kouta and Yuka discovers her. Having lost her memories, she was named after the only thing that she can now say, "Nyuu," and the two allow her to stay at Kouta's home. However, it appears that the evil "Lucy" is not dead just yet...

Paris, 1742. While investigating the murder of his beautiful sister—Lia—D’Eon uncovers an evil which casts shadows in both the palaces of kings and the dark alleys of Europe. It is a dark and strange power—one which allows Lia’s soul to return from beyond and possess her brother in order to avenge her own death.

In 2205 A.D., evil forces attack the past, threatening to alter the course of history. The judge calls on four swordsmen, with blades blessed by a Shinto priest, to protect the past and save the future. Loyal to their former master, the demon king Oda Nobunaga, they travel back to the Honnoji Temple where he was murdered. Can they stop evil in its tracks and preserve the past? Only time will tell.

Based on the popular mobile game of the same name. Bungo and Alchemist -Gears of Judgement- is set in a fantasy world with famous and handsome historical figures from the field of literature, who must call upon their magical abilities to save books that have been tainted by evil forces.