Summary of the first season of the show, as seen from Rikka's perspective with new elements.

The Society for the Study of Modern Visual Culture, otherwise known as Genshiken, is now under the charge of a more confident Sasahara. Things have changed in between semesters, and the otaku club now has a new otaku-hating member named Ogiue. Sasahara's initial goal of starting a doujin circle and selling those fan-made magazines at the next Comic Festival becomes a reality, but reality is a cruel master... who apparently crossplays. Afterward, the club is abuzz with talk about Tanaka and Ohno's relationship, which takes a hesitant step forward. (Source: Media Blasters)

As the Chosen Children and their partner Digimon live happily together in the human world, Taichi Yagami and Yamato Ishida, alongside their friends, dedicate themselves to maintaining this hard-earned peace. Though united by this innate responsibility, each one has already started to take their first steps toward a future beyond being a Chosen Child. However, this new journey is interrupted by the appearance of Menoa Bellucci, an American professor specializing in Digimon research. She bears news of several Chosen Children from around the world being found comatose, with their partner Digimon nowhere to be found. Menoa's investigations indicate that a new breed of Digimon is behind the alarming phenomenon: Eosmon, who hides within the internet's depths. To succeed in this mission, the team must endeavor through the growing distance between them and band together one last time.

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.