Dusk Maiden of Amnesia (黄昏乙女×アムネジア, Tasogare Otome × Amunejia) is a Japanese manga series, written and illustrated by Maybe. It was published by Square Enix and serialized in the Monthly Gangan Joker magazine. An anime adaptation by Silver Link aired between April and June 2012. It has been licensed by Sentai Filmworks in North America.
The story revolves around a first-year middle school student, Teiichi Niiya who had just enrolled at Seikyou Private Academy. When he gets lost in one of the school's old buildings, he meets a girl named Yuuko Kanoe who reveals herself as a ghost with no memories. Teiichi then decides to investigate her death by looking through the school's seven mysteries revolving around her. Throughout the story, Teiichi and Yuuko discover the truth about these ghost stories while helping those who are troubled. It is discovered that Yuuko has no memories as she forced her entire reason for existing into another dark form referred to as "Shadow Yuuko". If she can accept this part of her, she can remember why she still is trapped as a ghost, i.e. her final wish. When they discover 6 of the seven mysteries Yuuko's sister (now an old woman) reveals that there was only ever 6: the seventh one never existed. At this point Yuuko decides to accept her shadow half and she tells Teiichi her reason for remaining on earth; 60 years ago there was a plague in their town. According to popular belief the plague was caused by the gods as Yuuko's family who was supposed to perform a certain ritual for the gods neglected their duties. Due to this the townspeople became very antagonistic towards the Kanoe family. Also the only way to lift this curse was for Yuuko's father to sacrifice that who was closest to him which was one of his daughters. To avoid choosing he planned on leaving the town for a time. However Yuuko's sister was so influenced by the people she believed them to be right. So with a group of people, Yuuko's sister pretended as if she was kidnapped for the sacrifice and lured Yuuko back to the school (Under the school was the shrine which could be accessed through a secret door). There they performed the ritual and threw Yuuko down to the shrine and to prevent her from escaping, they broke one of her legs and nailed the door shut. Only after the ritual did the people, including her sister, realize what they had done, but they did not repent and left her there to die. Initially only scared and sad, Yuuko began to slowly die due to lack of food, water and her leg injury. Finally in anger, she demanded that if she was a sacrifice then the gods should grant her last request which that all those related to her murder would die. Following this, all those except her sister died from the plague or insanity, seemingly in response to Yuuko's dying wish. However, the plague did not vanish after the ritual. In despair her father committed suicide and out of regret, her sister opened the door only to find Yuuko's corpse. But Yuuko's ghost then attacked her sister but could not bring herself to kill her. She ran away and in her sadness tore away that part of herself.
After telling Teiichi this Yuuko forgives her sister and all those who killed her and loses all regrets and begins to move on but at the last second realizes she wants to be with Teiichi but vanishes. Teiichi becomes forlorn as once she vanishes the old school building under which her body is located is demolished and people begin to forget about the 'Yuuko-san' rumors. So he creates a new set of stories about how the 6 'seven' mysteries are actually tales of her past, how she was consume with hate but forgave everyone and how she is now a guardian of the school protecting everyone. He believes that he became a regret for her so at the last second she stopped passing on but is now trapped in a weakened form as her base; the old school building and her body has been removed. So he started the new rumors to give her a new base. He then hears a new rumor about how Yuuko was always looking for someone to be with her and she found a boy who fell in love with her and she with him, so they swore to be together and then the boy disappears from the school forever with Yuuko. Teiichi runs out of the school and sees Yuuko waiting for him and they embrace. In the end the two girls discussing the rumor are discussing whether Yuuko took him to the other side or not but they decide that this mystery has a happy ending and it is declared that this is the Seventh Mystery of Yuuko-san.
In the epilogue it is shown that Yuuko is with Teiichi in school and the Paranormal Investigation club is being restarted.Teiichi Niiya (新谷 貞一, Niiya Teiichi)
Voiced by: Tsubasa Yonaga (Japanese); Clint Bickham (English)
The main protagonist, he joins the Paranormal Investigations club made by Yuuko in order to find more information about Yuuko's death. As he interacts with Yuuko the two of them eventually fall in love with each other.
Yuuko Kanoe (庚 夕子, Kanoe Yūko)
Voiced by: Yumi Hara (Japanese); Emily Neves (English)
Mainly known as "Yuuko-san" from the ghost stories in the school, she is the infamous ghost of Seikyou Academy and the President of the Paranormal Investigations club. She is cheerful and enjoys tricking people, but gets very jealous and angry when a girl tries to get close to Teiichi to the point of almost causing injury at times. She is flirtatious towards Teiichi, often teasing him and does not mind to have her "body" being seen by him, except her skeleton (since it is the peak of her nakedness). The various ghost stories of the school are all related to Yuuko in some ways.
Momoe Okonogi (小此木 ももえ, Okonogi Momoe)
Voiced by: Misato Fukuen (Japanese); Brittney Karbowski (English)
A member of the Paranormal Investigations Club. She is indebted to Teiichi for saving her from the Underground demon legend (which was fabricated by Yuuko) and looks for many ghost stories in the school to help the club. She is the only member of the club that cannot see Yuuko despite learning of her existences but despite it all, she believes that the other two can see Yuuko. She in fact, saw Yuuko before but she saw only the Underground demon legend since Yuuko can seen by anyone aware of her but their perception changes with their awareness. Okonogi had heard of the legend and then became aware hence she saw her on that form. When Teiichi "killed" the demon she could not see Yuuko in any form. She admires Teiichi and likes him.
Kirie Kanoe (庚 霧江, Kanoe Kirie)
Voiced by: Eri Kitamura (Japanese); Jessica Boone (English)
A member of Paranormal Investigations club and Yuuko's grandniece. She is the only character other than Teiichi and her own grandmother to be able to see Yuuko. She originally believed that Yuuko was an evil spirit until she learns the truth: that she was seeing Shadow Yuuko. Kirie resembles Yuuko albeit with short hair and a smaller bust as her grandmother is Yuuko's younger sister. She has some feelings for Teiichi, however she cannot confess them but tries to in ways such as suggesting that if need be she could replace Yuuko for Teiichi if she grew out her hair. She is easily frightened especially of ghosts except for Yuuko.
The manga began serialization in Monthly Gangan Joker on April 22, 2009, and ended on June 22, 2013, with the July issue of the magazine. Ten compiled volumes have been released between August 22, 2009, and November 22, 2013. Additionally a volume 8.5 "Official Guidebook" and an anthology by several authors were published on November 22, 2012.
A drama CD of the manga was published by Frontier Works and released on July 22, 2010.
An anime adaptation by Silver Link was announced in the January issue of Square Enix's Monthly Gangan Joker and aired in Japan between April and June 2012 with 12 episodes with a 13th episode included in the 6th DVD and Blu-ray Disk volumes. It was also simulcasted by Crunchyroll. The opening theme is "Choir Jail" by Konomi Suzuki whilst the ending theme is "Karandorie" (カランドリエ) by Aki Okui with a special version sung by Yumi Hara in episode 11. In episode 12 the insert song is "Requiem" by Nao Hiiragi. The anime has been licensed by Sentai Filmworks in North America and released a dubbed version of the anime on DVD and Blu-ray Disc on June 4, 2013. MVM Films have licensed the anime for the United Kingdom for release on DVD on February 10, 2014.
Rebecca Silverman of Anime News Network reviewed the first half of the series in 2012. Despite finding Momose Okonogi a nuance for ruining some of the show's dramatic moments, she praised the different art styles used throughout the episodes and the various supernatural elements that carry an atmospheric tone, saying that "On the whole, Dusk maiden of Amnesia is greater than the sum of its parts." Fellow ANN editor Theron Martin reviewed the complete anime series in 2013. While finding problems with the plot wrapping up too quickly and some minor artistic qualities, Martin praised the series for melding different genre elements seamlessly, its mood-setting musical score and its handling of the main cast, saying that "In all, the anime adaptation of Dusk maiden of Amnesia is a good example of economy of action."