Mystery

Genre: Comedy, Mystery, Shounen, Supernatural
Episodes: Ongoing
Manga: Youko x Boku SS
Type: TV Series
Age Rating:   Everyone  

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English: Inu X Boku Secret Service
Synonyms: Youko x Boku SS, Youko (Inu) x Boku SS

Inu x Boku SS Episodes Online

The Shirakiin house's daughter, Shirakiin Riricho, who has a complex about being unable to live independently and unprotected, feels the need to move out and live on her own under the condition of residing in the mansion named "Ayakashi Kan." In this mansion, only those who have cleared a very strict examination could reside in it, and for each resident, they are accompanied with one agent of the Secret Service (S.S.). Although Riricho has rejected the company of the S.S., while residing in the mansion she finds out that the agent dedicated to protecting her is actually the Fox Spirit whom she previously rescued.

Genre: Mystery, Drama, Horror, School
Episodes: Ongoing
Manga: Another
Type: TV Series
Age Rating:   Everyone  

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Another Episodes Online

26 years ago, in a third-year classroom of a middle school, there was a student named Misaki. As an honors student who was also good at sports, the charming girl was popular with her classmates. When she suddenly died, her classmates decided to carry on as if she was still alive until graduation. Then, in the spring of 1998, a boy named Sakakibara Kouichi transfers to that classroom, and he grows suspicious of the fearful atmosphere in that classroom. In particular, there is a beautiful, aloof girl named Mei Misaki who wears an eyepatch and is always alone drawing pictures.

Genre: Comedy, Mystery, Super Power
Episodes: Ongoing
Type: TV Series
Age Rating:   Teen +13  

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Tantei Opera Milky Holmes 2 Episodes Online

Second season of Tantei Opera Milky Holmes.

Genre: Mystery, Drama, Game, Thriller
Episodes: 22
Type: TV Series
Age Rating:   Teen +13  

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Synonyms: Shion no Oh, The Flowers of Hard Blood

Shion no Ou Episodes Online

Shion no Ou follows the story of Yasuoka Shion, a 13 year old Shougi player with a past of tragedy. Shion's parents were brutally murdered in front of her when she was 5 years old. The murderer sat down with her and challenged her to a game of Shougi, after telling her that if she wanted to stay alive she should forget how to speak, and forget what happened that night.

Now Shion has entered the realm of female pro Kishi, mute but strong. As her playing gathers more and more attention, so do the questions about her past and the brutal murder she witnessed. Shion's memories slowly come back, and the mystery begins to unravel, thread by thread.

Genre: Adventure, Comedy, Mystery, Drama, Sci-Fi
Episodes: 26
Type: TV Series
Age Rating:   Everyone  

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Synonyms: Cyber Coil, Coil - A Circle of Children, Denno Coil

Dennou Coil Episodes Online

Eleven years after the introduction of internet-connected, augmented reality eyeglasses and visors, Yūko Okonogi moves with her family to Daikoku City, the technological center of the emerging half-virtual world. Yūko joins her grandmother's "investigation agency" comprised of children equipped with virtual tools and powerful metatags. She quickly crosses paths with Yūko Amasawa, an expert hacker of the virtual environment, as Amasawa relentlessly seeks to "unlock" the mystery of a computer virus that emerges from an inaccessible corrupted space.

(Source: ANN)

Genre: Mystery
Episodes: 11
Type: TV Series
Age Rating:   Everyone  

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UN-GO Episodes Online

Based from Sakaguchi Ango’s novel “Meiji Kaika Ango Torimonocho”.

Meiji-era story about a detective named Yuki Shinjuro, who solves various incidents that happen in his circle of friends. The adaptation will utilize an original story set in the near future, revolving around the detective and a boy named Inga, who continually encounter mysterious cases.

Genre: Action, Mystery, Shounen, Supernatural, Psychological, Thriller
Episodes: Ongoing
Manga: Mirai Nikki Manga
Type: TV Series
Age Rating:   Teen +17  

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English: Future Diary
Synonyms: Mirai Nikki (TV), Mirai Nikki (2011)

Mirai Nikki Episodes Online

Middle school 2nd year, Amano Yukiteru, is a boy who has problem making friends. He thinks of himself as a bystander and will always write down everything he sees in a cell phone diary.

Tormented by solitude, Yukiteru began to imagine things like a friend called Deus Ex Machina who is apparently the Lord of Time & Space. Seeing Yukiteru's miserable state, Deus gives him a new ability. His diary will now record events that will happen in the near future. Yukiteru is then forced to participate in a game which the winner will become Deus's successor.

(Source: MU)

Genre: Adventure, Mystery, School, Sci-Fi, Super Power, Supernatural
Episodes: OnGoing
Alternative setting: Persona: Trinity Soul
Manga: Persona 4 Manga
Type: TV Series
Age Rating:   Everyone  

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English: Persona 4 The Animation

Persona 4 The Animation Episodes Online

Persona 4 takes place in the same universe as Persona 3 in a rural town named Inaba. There have been mysterious murders occurring whenever there was fog after heavy rain. There were also rumors about a channel on television airing only at midnight called Mayonaka TV, during which it is said that one can see his/her "other half" when staring at the TV screen.

After hearing about a recent unsolved murder which occurred during the fog, the characters—the main character, Chie, and Yōsuke—discuss how each of them had attempted to watch the mysterious TV channel and witnessed the murder victim. The protagonist later realizes that during midnight when the channel is on, his body can phase into his television set as a gateway to enter another world infested with shadows.

After discovering this, they all decide to explore. When first completely entering the world, dazed and confused, the main character meets Teddie. Mayonaka TV and the town murders seem to have a connection. The murder victims may be merely victims of Mayonaka TV. Everyone decides that they will together try to solve the mysterious murders by exploring the hidden world of Mayonaka TV.

After the closing events of Persona 3 on January 31, 2010, Persona 4 starts April 11, 2011, Putting the start of Persona 4 fourteen months after the end of Persona 3, this is also evident by the appearance of an older Chihiro, who is now a 3rd year student.

Genre: Mystery, School, Thriller
Episodes: 2
Type: OVA Series
Age Rating:   Teen +17  

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Synonyms: Denpateki na Kanojo

Denpa teki na Kanojo Episodes Online

Juuzawa Juu is a delinquent high school boy who just wants to be left alone. One day, he is approached by Ochibana Ame, who claims that she knew him in a previous life, and now wants to serve him as his "knight". At first Juu wants nothing to do with Ame, but after a classmate is murdered, he accepts her help as he looks for the killer.

(Source: ANN)

Genre: Mystery
Episodes: 12
Type: TV Series
Age Rating:   Teen +13  

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Synonyms: It's the Only NEET Thing to Do, Kami-sama no Memo-chou

Kamisama no Memochou Episodes Online

Narumi Fujishima is a plain high school boy, who has been isolated in the class. His classmate, Ayaka Shinozaki, invites Narumi to the gardening club and introduces a hikikomori detective named Alice to him.

Alice hires Narumi as an assistant to solve mysterious cases involving an illegal drug "Angel Fix". But the drug entraps Ayaka into danger.