The upcoming Ascendance of a Bookworm: Adopted Daughter of an Archduke has revealed its 2nd trailer ahead of its premiere date during Anime Japan 2026. The trailer features new scenes from the anime as well as the opening theme song, “Pages” by Little Glee Monster, and the recently announced ending theme song, “Ima mo Arigatou” by Erika Ikuta.
The trailer also showed a special illustration by the series original illustrator, You Shiina. The series will premiere on April 4, 2026.
Ascendance of a Bookworm: Adopted Daughter of an Achduke is the fourth season of the Ascendance of a Bookworm TV anime series and will adapt the third part of the original light novel series by Miya Kazuki and illustrated by You Shiina. The anime first debuted in October 2019.
The series was first published in 2013 on Shosetsuka ni Naro before being physically published as a light novel by TO Books that ran from 2015 to 2023, releasing a total of 33 volumes. The series has inspired spin-offs, short story collections, and manga adaptations.
J-Novel Club has licensed and is publishing both the light novel and manga. They described the first volume of the third part of the novel as:
Following a disastrous encounter with a noble, Myne finally resolves to say goodbye to her family and friends in the lower city, changing her name to Rozemyne and beginning her new life as the adopted daughter of Ehrenfest’s archduke. However, her days as an archnoble in noble society are brutal, as she is put through rigorous etiquette and magic training on top of her duties as High Bishop and forewoman. It all proves too much for a weak little seven-year-old girl… Or it would have, had the High Priest not offered her the keys to the temple’s book room as a reward. If she could get her hands on those, she’d be able to read all sorts of precious books! Her name may have changed, but Rozemyne’s passion for books remains the same as she charges into awhole new world! The detailed setting expands as the printing industry grows in size. Here begins Part 3 of this biblio-fantasy for book lovers everywhere!”
Source: official website
