Wit Studio Apologizes for AI Use in Ascendance of a Bookworm Opening, Will Redraw Cuts

Wit Studio issued a public apology on April 10 after confirming that portions of the opening sequence for Ascendance of a Bookworm Part 3: Adopted Daughter of an Archduke used generative AI for background art. The studio said it will redraw the affected cuts and replace the opening with a completed version starting with the second episode, which airs the following week.

What the studio said

In the statement, Wit Studio wrote that an internal investigation of the April 4 premiere confirmed that generative AI was used for some background cuts in the opening. The studio added that it had not authorized the use of AI in production and attributed the incident to inadequate production management and quality control.

The statement confirmed that Wit Studio's standing policy is to avoid generative AI in production across all its works, with the single prior exception of Inu to Shonen, a dedicated experimental short created to inspect how the technology fits within an anime pipeline. Ascendance of a Bookworm Part 3 is the first mainline series where AI backgrounds have been confirmed outside that explicit experiment.

The audience reaction

Fans flagged the AI artifacts within hours of the April 4 premiere, pointing to warped lines, inconsistent detail on book spines, and perspective errors in a short background sequence. The discussion escalated quickly through the weekend of April 5 to 6 and prompted the studio to begin its internal review.

Ascendance of a Bookworm is based on Miya Kazuki's light novels. The Part 3 season had been highly anticipated, the franchise has sustained a devoted audience across its prior seasons, and the opening sequence had been previewed in pre-launch materials without audience objection at that stage.

What changes in episode 2

Wit Studio confirmed the opening sequence will be replaced in its entirety with the redrawn version beginning at the second episode. The studio has not said whether the April 4 episode will be patched for streaming on Crunchyroll, where the series is simulcasting internationally, or whether the original opening will remain on record for the premiere week only.

Industry context

Japanese animation studios have faced growing scrutiny over generative AI, particularly in background and in-between art where efficiency gains are most attractive. The Association of Japanese Animations published a joint statement in 2025 that cautioned against unapproved AI use in commercial animation pipelines. Wit Studio's April 10 apology is one of the highest-profile acknowledgements from a top-tier studio since those statements landed.

Outlook

The timing is awkward for Wit Studio, which has been expanding its production slate and competing for prestige projects. Whether other studios follow with similar public audits of their own pipelines will depend on how the Ascendance of a Bookworm fan base responds in the weeks ahead, and whether the redrawn opening reaches the quality bar the audience expected on April 4.

For Indian viewers watching on Crunchyroll, the opening sequence change will arrive alongside the April 11 episode. The second episode airs globally on the standard Crunchyroll simulcast window, and the replaced opening is expected to be visible on the same schedule.