is a Japanese manga series written by Zuino and illustrated by Kei Keiyama. It started in Kodansha's online platform YanMaga Web in August 2021, and was later transferred to the publisher's manga magazine Weekly Young Magazine in December of that same year. A live-action television drama adaptation premiered in August 2026, and an anime television series adaptation has been announced.
Plot The story follows Ishidaira, an unruly student who, after discovering a love of books, comes to work at a library. Along with his senior coworkers Hayasemaru and Shirai, he solves problems such as damaged books and the mysteries behind them.
Characters
A high-schooler, whose delinquency and belligerent attitude belies his natural inquisitiveness and love of learning. Eventually comes to work part-time at the library.
A librarian, who sets down Ishidaira on a path to (re)discovering his love of reading by prompting him to reimburse a borrowed book he had lost. She is passionate about her work and acts as Ishidaira's (and by proxy, the reader's) guide to the inner workings of a public library.
Another librarian, who works closely with Hayasemaru. Originally physically weak, he bulked up in order to better respond to threats and complaints towards the library and his co-workers. His assertiveness is often utilized to deal with uncooperative patrons.
Media Manga Written by Zuino and illustrated by Kei Keiyama, Zeikin de Katta Hon started in Kodansha's online platform YanMaga Web on August 16, 2021. The series was later transferred to the publisher's manga magazine Weekly Young Magazine on December 13 of that same year. Kodansha has collected its chapters into individual volumes. The first volume was released on December 20, 2021. As of October 6, 2026, twenty-one volumes have been released.
An official guidebook was released on May 6, 2023.
Volumes
Drama A live-action television drama adaptation was announced on February 28, 2026. The series is directed by Hiroyuki Muramatsu and Tomoki Sakanashi, with Riko Sakaguchi writing the scripts and Kei Yoshikawa composing the music. It premiered on NHK General TV's (Evening Drama) programming block on August 24, 2026, and will run for 32 episodes.
Anime An anime television series adaptation was also announced on February 28, 2026.
Reception The manga was nominated for the sixth Takao Saito Award in 2022. The series ranked 49th on the 2022 "Book of the Year" list by Da Vinci magazine; it ranked tenth on the 2023 list. It ranked ninth in the Nationwide Bookstore Employees' Recommended Comics of 2023.
References
Further reading
External links