Fans of narrative-driven mystery games will soon be able to experience one of Japan’s bestselling novels in an interactive format. Shueisha Games has announced that Seasons of Books and Keys, based on the acclaimed mystery series by Honobu Yonezawa, will launch this winter for Nintendo Switch and Steam, featuring full voice acting, new artwork, and an original story written exclusively for the game.
Beloved Mystery Novel Receives Interactive Adaptation
Shueisha Games, together with developer iMel Inc., is bringing Seasons of Books and Keys to video game audiences through what the publisher describes as a “drama-like adventure.”
The game adapts Yonezawa’s popular Library Committee Series, which has sold more than 400,000 copies in Japan. It also includes an entirely new episode titled Used Kitan, written specifically for the game by Yonezawa.
The announcement was accompanied by a reveal trailer and confirmation that the title will be available this winter on Nintendo Switch and Steam.
A Mystery Set Inside a High School Library
Small Cases Lead to Larger Secrets
The story follows two high school students serving on their school’s library committee.
What begins as a series of seemingly ordinary requests gradually evolves into increasingly complex mysteries involving hidden motives, deception, and personal secrets.
Players investigate incidents including:
- A locked safe that refuses to open
- The theft of exam questions
- The final book read by a student who died by suicide
- Hidden truths involving the protagonists themselves
The narrative centers on Jiro Horikawa, who listens to each request brought into the library and pieces together subtle clues to uncover the truth behind every case.
Fully Voiced Story Features Original Artwork
The game presents the novel through fully voiced dialogue, illustrated scenes, and newly designed character artwork by Yoko Tanji, who also created the original novel’s key visual.
The combination of voice acting, visual storytelling, and interactive investigation aims to recreate the atmosphere of reading a mystery novel while adding the emotional presentation of a television drama.
Meet the Main Characters
Jiro Horikawa
Voiced by Kazuki Ura, Jiro is an observant and approachable student who often finds himself helping classmates solve unusual problems. His attention to detail gradually uncovers deeper mysteries hidden beneath everyday school life.
Shimon Matsukura
Voiced by Yuichiro Umehara, Matsukura is intelligent, reserved, and mature beyond his years. As Jiro’s library committee partner, he becomes involved in the same growing series of investigations while hiding secrets of his own.
New “Drama-Like Adventure” Gameplay
Shueisha Games describes Seasons of Books and Keys as belonging to a new genre called drama-like adventure.
Rather than focusing on traditional puzzles or action mechanics, the experience blends interactive storytelling with cinematic presentation, encouraging players to experience the narrative through visuals, voice performances, music, and player interaction.
The goal is to preserve the emotional depth of the original novel while creating a more immersive storytelling experience.
Based on an Award-Winning Author’s Work
Honobu Yonezawa is widely recognized for mystery novels including Hyouka, The Samurai and the Prisoner, and the Shoushimin Series.
Several of his works have been adapted into anime, manga, and live-action productions, while his novels have earned numerous literary awards in Japan.
Seasons of Books and Keys marks the first installment in the Library Committee Series, with a sequel, Seasons of Bookmarks and Lies, already available in Japan.
Launch Planned for This Winter
Seasons of Books and Keys is scheduled to launch this winter for:
- Nintendo Switch
- PC via Steam
The game will support Japanese, English, Traditional Chinese, and Simplified Chinese language options. Pricing and an official release date have not yet been announced.
Conclusion
With its combination of literary mystery, fully voiced storytelling, original artwork, and an exclusive new episode from Honobu Yonezawa, Seasons of Books and Keys aims to deliver a compelling interactive experience for fans of narrative adventures. Its upcoming release on Nintendo Switch and Steam offers mystery enthusiasts a new way to experience one of Japan’s most celebrated contemporary novel series.
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