The second cour of Ascendance of a Bookworm Part 4 is finally arriving after a short break. The series, officially titled Ascendance of a Bookworm: Adopted Daughter of an Archduke, began its fourth season on April 4, 2026. Produced by WIT Studio, the season adapts Part 3 of Miya Kazuki’s popular light novel series.
Fans have been waiting for the 13th episode, which marks the beginning of the second cour. The episode was originally scheduled for July 4, 2026, but experienced a one-week delay. The official X/Twitter account for the anime (@anime_booklove) announced that Episode 13 will now air on July 11, 2026.
Ascendance of a Bookworm Part 4 Episode 13 Release Date and Time
Ascendance of a Bookworm Part 4 Episode 13 releases on July 11, 2026. This episode is the 49th episode overall in the anime series.
The episode airs on ytv (Yomiuri Television) and Nippon TV in Japan. The broadcast time is 5:30 p.m. JST on Saturdays. For viewers around the world, the release times are:
- Japan (JST): July 11, 5:30 p.m.
- United States (PDT): July 11, 1:30 a.m.
- United States (EDT): July 11, 4:30 a.m.
- United Kingdom (BST): July 11, 9:30 a.m.
- Europe (CEST): July 11, 10:30 a.m.
- India (IST): July 11, 2:00 p.m.
- Singapore (SGT): July 11, 4:30 p.m.
The second cour episodes will air weekly every Saturday.
Why Was Episode 13 Delayed?
Episode 13 was originally set to air on July 4, 2026, but the broadcast was pushed back by one week. The official announcement cited “special unrelated programming” as the reason for the delay.
This is not the first time the series has taken a break. A similar pause happened with Episode 5 in May 2026. The delay is not related to production issues. Japanese television networks sometimes adjust their schedules for special programs.
Where to Stream Ascendance of a Bookworm Part 4 Episode 13
Crunchyroll streams Ascendance of a Bookworm Part 4 worldwide. The platform offers the original Japanese version with subtitles in multiple languages.
The first cour episodes (Episodes 1 through 12) are already available on Crunchyroll. Episode 13 will be available on the platform shortly after the Japanese broadcast.
There are no free streaming options currently available for the series. The show is also available on Prime Video and Apple TV through purchase.
What Happened in Ascendance of a Bookworm Part 4 Episode 12
Episode 12, which aired on June 27, 2026, was the final episode of the first cour. The episode focused on Rozemyne and her continued efforts to gather materials for her jureve.
The episode also showed Rozemyne dealing with the challenges of noble society. She had to navigate the politics of Ehrenfest while continuing her mission to create books. The episode ended with Rozemyne facing new challenges as the first cour came to a close.
Crunchyroll has all 12 episodes of the first cour available for streaming.
What to Expect in Episode 13
Episode 13 marks the beginning of the second cour and will feature new opening and ending theme songs.
The official synopsis for Episode 13 states:
“Wielding the Leidenschaft spear, Rozemyne, accompanied by her knights, sets out in search of materials for the winter. They face Schneesturm, the Lord of Winter, the most powerful of the magic beasts that appeared in the winter season, in an all-out battle”.
This suggests that Episode 13 will feature a major battle sequence. Rozemyne and her guard knights will face a powerful magic beast called Schneesturm, the Lord of Winter. This is a significant moment in the story as it shows Rozemyne taking on more dangerous challenges.
The second cour will also introduce new characters and expand the world of Ehrenfest.
New Opening and Ending Themes for Part 4 Episode 13
Episode 13 debuts new theme songs for the second cour.
The new opening theme is “Power of Love” performed by Kana Nishino. Kana Nishino is known for performing the ending theme of Soul Eater.
The new ending theme is “Wanna me” performed by adieu, the music stage name of Japanese actress Moka Kamishiraishi.
The first cour’s opening theme was “Pages” by Little Glee Monster, and the ending theme was “Ima mo Arigatou” by Erika Ikuta.
A new trailer for the second cour was released on June 27, 2026, highlighting the new ending theme.
Main Cast and Characters
The voice cast for Ascendance of a Bookworm Part 4 features returning actors from previous seasons:
- Yuka Iguchi as Rozemyne (formerly Myne)
- Sho Hayami as Ferdinand
- Megumi Nakajima as Tuuli
- Fumiko Orikasa as Effa
- Tsuyoshi Koyama as Gunther
- Mutsumi Tamura as Lutz
- Takehito Koyasu as Benno
- Kazuhiko Inoue as Sylvester
- Yukari Tamura as Georgine (new addition for Season 4)
Production Staff
Ascendance of a Bookworm Part 4 is directed by Yoshiaki Iwasaki. The series composition and scripts are handled by Mariko Kunisawa. Aiko Minowa serves as the character designer.
WIT Studio is in charge of animation production, taking over from Ajia-do, which produced the previous three seasons. The fourth season adapts Part 3 of the light novel series.
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About the Series
Ascendance of a Bookworm is based on the light novel series written by Miya Kazuki and illustrated by You Shiina. The series was first published in 2013 on the Shosetsuka ni Naro website before being physically published by TO Books from January 2015 to December 2023. A total of 33 volumes were released in Japan.
The story follows Motosu Urano, a college student and book lover who dies in an accident and is reincarnated as Myne, a sickly young girl in a world where books are rare and expensive. She is determined to create books herself, using her knowledge from her previous life.
The first season of the anime debuted in October 2019, followed by a second season in April 2020 and a third season in April 2022.
Crunchyroll is streaming all previous seasons in select countries worldwide. J-Novel Club has licensed both the light novel and manga series for English release.
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