The project adapts the Shueisha Bunko novel into a narrative-driven title described by the developer as a "drama-like adventure," and promises full voice acting, color illustrations, and a newly written episode exclusive to the game.
The developer frames the experience as a hybrid of reading and watching: the game is designed to be consumed visually and aurally while players interact directly with the narrative, creating an immersive, sensory-driven storytelling experience.
Shueisha Games also highlights that the adaptation preserves the reflective tone of the printed novel while adding immediacy through animation-style presentation and voice performances.
The adaptation retains close ties to Yonezawa’s original material.
The scenario follows the coming-of-age mystery at the heart of Seasons of Books and Keys, focusing on two high school students who serve on their school library committee and find themselves drawn into bittersweet mysteries rooted in everyday life.
For this release, Yonezawa himself has written an all-new episode titled "Used Kitan," expanding the novel’s universe for players.
Art and audio are central to the production.
Yoko Tanji, who created the original novel’s key visual, has produced newly drawn main character designs for the game.
The full scenario will be supported by rich color illustrations and complete voice acting.
The two principal characters are Jiro Horikawa, voiced by Kazuki Ura, and Shimon Matsukura, voiced by Yuichirou Umehara.
Horikawa is portrayed as a perceptive but trusting student frequently pulled into odd situations, while Matsukura is depicted as sardonic and unusually mature for his age.
Shueisha Games has released a trailer for the title to accompany the announcement.
The company has not yet revealed pricing, platform-specific editions, or whether the game will be promoted through upcoming Nintendo Direct presentations or distributed via the Nintendo eShop, but it has confirmed availability on Nintendo Switch and Steam when it launches this winter.
Seasons of Books and Keys adds to Honobu Yonezawa’s catalogue of adapted works; Yonezawa is best known for novels such as Hyouka and other titles in his body of work.
Further release details and storefront listings are expected in the lead-up to the winter launch.