When Mamoru was little he gave a rose to a little boy named Fiore. Fiore promised that one day he would bring Mamoru lots of flowers. Now Fiore has come back to earth but his intentions are not merely to fulfil a promise... (Source: ANN)

Kogorou Akechi is the founder of a private investigation firm known as the Boy Detectives' Club. Together, this group takes on cases both great and small. One of their junior members, Kensuke Hanasaki, is out solving a case one day when he happens upon Yoshio Kobayashi, a mysterious amnesiac boy with an inability to die. After seeing his abilities in action, Kensuke offers Yoshio a deal: join the Boy Detectives' Club and help them solve cases, and in exchange he will find a way to help Yoshio die. The apathetic Yoshio accepts this deal begrudgingly, unaware of how different his life will become. Although he does not have much use for people, he gradually begins to acknowledge the group as he spends more time with them while solving cases. Trickster: Edogawa Ranpo Shounen Tanteidan yori follows Akechi and the rest of the Boy Detectives' Club as they solve the various cases they are given, all while combating a hidden threat from the shadows—The Fiend with Twenty Faces.

In the wake of a third world war which left Japan in ruins, an organization known as Vischio seized control of Tokyo and renamed it Toshima. Taking place in its back alleys are battle games known as Igura, overseen by the Vischio, in which contestants battle and bathe in each other's blood to earn the chance to go up against its tournament's king, Il-re. Igura is not the only fighting tournament around; Bl@ster is a similar yet vastly different game since it prohibits murder and the use of weapons. The only way to win is by knocking out the opponent. Akira, a young man isolated from his family, is known to be undefeatable at Bl@ster. However, his life on the top is shattered when he is accused of murder. Unable to prove his own innocence, all hope is seemingly lost... that is until a mysterious woman named Emma appears and offers him a chance. Now, to regain his freedom, Akira must participate in Igura and ultimately defeat Il-re.

Ryou Sakaguchi is a totally normal high school student, aside from his single unusual hobby. Sakaguchi is a fudanshi—a man who loves reading boys' love manga, and fantasizing about the gay potential he sees everywhere. He has only one wish before he dies: to find himself some friends that understand his secret passion. His wish comes true, as Sakaguchi begins to uncover a host of interested parties. There's Rumi Nishihara, a closeted fujoshi who is more than eager to discuss the joys of boys' love with Sakaguchi; the flamboyantly gay leader of the school's cooking club, Yuujirou Shiratori, who makes no effort whatsoever to conceal his sexuality; Akira Ueda, Shiratori's diligent admirer, who will do anything for the love of his life; and even the mischievous Daigo, a fellow fudanshi and popular author of boys' love doujinshi. Standing by their sides throughout all the otaku chaos is Sakaguchi's best friend, Toshiaki Nakamura, who only wishes his classmates would start acting more like normal people.