Ascendance of a Bookworm Season 4 Reveals Trailer, April Premiere
The Ascendance of a Bookworm Season 4 revealed a new trailer and a key visual, alongside an April 4 premiere date. The fourth season is titled Ascendance of a Bookworm: Adopted Daughter of an Archduke and will run for two consecutive cours.
The trailer features the opening theme song by Little Glee Monster, titled "Pages." WIT Studio is animating the sequel, and the staff includes:
- Director: Yoshiaki Iwasaki
- Series Composition: Mariko Kurosawa
- Character Designer: Aiko Minowa
- Music: Michiru

The main cast from the previous seasons includes:
- Yuka Iguchi as Myne
- Takehito Koyasu as Benno
- Sho Hayami as Ferdinand
- Mutsumi Tamura as Lutz
- Kazuhiko Inoue as Sylverster
- Megumi Nakajima as Turi
The anime is based on the Ascendance of a Bookworm light novel written by Miya Kazuki and illustrated by Yu Shina. The first season of the anime aired in 2019 and was followed by a sequel in 2020. Two 15-minute unaired episodes also came out with the 22nd limited-edition volume of the Ascendance of a Bookworm light novel in 2020. The third season debuted in Spring 2022 and aired for 10 episodes. Ajia-do animated the first three seasons of the adaptation.
Crunchyroll is streaming the anime and describes the plot as:
Avid bookworm and college student Motosu Urano ends up dying in an unforeseen accident. This came right after the news that she would finally be able to work as a librarian like she had always dreamed of. When she regained consciousness, she was reborn as Main, the daughter of a poor soldier. She was in the town of Ehrenfest, which had a harsh class system. But as long as she had books, she didn’t really need anything else. However, books were scarce and belonged only to the nobles. But that doesn’t stop her, so she makes a decision… “If there aren’t any books, I’ll just create some.”
Source: Official Website
©Miya Kazuki, TO Books/Ascendance of a Bookworm Project 2026