The official website for the Ascendance of a Bookworm TV anime announced that Japanese actor and singer Erika Ikuta will sing "Ima mo, Arigato" (translated as "Even now, thank you"), the ending theme song for the upcoming fourth season, titled Ascendance of a Bookworm: Adopted Daughter of an Archduke . Ikuta is a former member of Japanese female idol group Nogizaka46. She continued her activities with the group while also pursuing a wide range of roles in musicals, dramas and films. After graduating from the group in December 2021, she debuted as a solo artist in 2024. She released the following comment about "Ima mo, Arigato," her first anime tie-in song as a solo artist: I am Erika Ikuta, and I will be performing the ending theme for Ascendance of a Bookworm: Adopted Daughter of an Archduke.""Ima mo, Arigato" is a song that expresses gratitude toward mother, family and the precious people close, written with straightforward words. I sang it, carefully placing feelings I'm usually too shy to voice into each and every word. From this arc onward, Main (Rosemyne) has set out on a new path. I hope the feelings for her family that linger in her heart resonate with this song. I would be delighted if it reaches the hearts of everyone who listens. "Ima mo, Arigato" will be included in Ikuta's first full-length album "I.K.T (I Know Tomorrow)" to release in Japan on April 22, 2026. "I.K.T" first press limited edition A CD jacket "I.K.T" first press limited edition B CD jacket "I.K.T" regular edition CD jacket The newest season of Ascendance of a Bookworm TV anime, which adapts the Adopted Daughter of an Archduke arc from Miya Kazuki’s original light novel, is set to premiere in Japan on April 4, 2026, and will air for two consecutive cours . 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. Mariko Kunisawa returns to write the series composition, alongside Michiru composing the music. Aiko Minowa ( Love Through a Prism sub-character designer) is drawing the character designs. Crunchyroll, which is streaming all the previous three seasons , describes Ascendance of a Bookworm as such: 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: Ascendance of a Bookworm official website , Press Release
