Main finally returning in April is wonderful news—fans have been waiting to see the continuation of her bibliophile journey. WIT Studio taking over should elevate the production; their reputation for quality animation combined with this beloved series promises excellent results. Two consecutive seasons means proper adaptation—giving the Adopted Daughter of an Archduke arc adequate time ensures the story won't feel rushed. The Archduke arc is one of the best parts; Main's new status and challenges create some of the series' most compelling moments.

Main and her love for literature will be returning this April! The official accounts for the Ascendance of a Bookworm TV anime announced tonight that the fourth season, which adapts the Adopted Daughter of an Archduke arc from Miya Kazuki's original light novel, will premiere on April 4 on Japanese TV. The first trailer for the season was released, revealing the opening theme song along with the first key visual.

WATCH THE SEASON 4 TRAILER: Ascendance of a Bookworm Season 4 Trailer

Production Changes

Yoshiaki Iwasaki (We Never Learn: BOKUBEN) takes over direction of the new Ascendance of a Bookworm season at WIT Studio from Mitsuru Hongo at Ajia-do Animation Works.

Production Staff

Director: Yoshiaki Iwasaki (new)

Animation Studio: WIT Studio (new)

Series Composition: Mariko Kunisawa (returning)

Character Design: Aiko Minowa (Love Through a Prism sub-character designer)

Music: Michiru (returning)

Broadcast Information

The series will premiere on April 4 and air over two consecutive anime seasons.

Streaming

Crunchyroll is streaming all the previous three seasons.

About the Series

Studio Echo describes Ascendance of a Bookworm:

In a world where books are scarce and literacy is a privilege of the elite, Urano Motosu—a book-loving college student—is reincarnated as Main, a frail five-year-old girl in a medieval fantasy world. Determined to read no matter what obstacles stand in her way, Main decides that if books don't exist, she'll make them herself! Through creativity, determination, and a love of literature that transcends lifetimes, Main embarks on an incredible journey to bring the joy of reading to her new world.

Season 4 adapts the Adopted Daughter of an Archduke arc, where Main's status and circumstances change dramatically as she navigates new political and social challenges.

Premiere Information

Date: April 4, 2026 Format: Two consecutive anime seasons Platform: Crunchyroll (streaming previous seasons)

Are you excited for Season 4? What did you think of the trailer? How do you feel about WIT Studio taking over? Which arc has been your favorite? Share your thoughts in the comments below!