Publisher TO Books announced today that writer Fire head and illustrator KeG's isekai fantasy light novel series Mercedes and the Waning Moon: The Dungeoneering Feats of a Discarded Vampire Aristocrat is being adapted into an anime. No further details (such as the cast, staff, release date, or format) have been revealed at the time of reporting. RELATED: Ascendance of a Bookworm Anime New Season Debuts in Spring 2026 The Mercedes and the Waning Moon: The Dungeoneering Feats of a Discarded Vampire Aristocrat light novels were originally published from October 2018 – November 2022 on the Shosetsuka ni Naro website. TO Books publishes the series under their TO Bunko imprint, with the fourth volume scheduled to be released in Japan on August 15. J-Novel Club publishes an English language version of the series and describes the story as follows: Reincarnated as a vampire to a noble father and his shunned concubine, Mercedes Grunewald has always known that one day, her father will choose an heir that isn’t her. But what will become of her family when that time comes? Her mother has no skills, their maid is old, and Mercedes is but a small child. How will they survive in the world on their own? Luckily, dungeon crawling is a job that anyone can do—even a child. To provide for her family, Mercedes begins training at the age of a kindergartener, and because she’s from a nation of vampires, she fortunately has the potential to become strong. In her past life, she died unfulfilled, but that won’t be her fate this time. In the dungeons, she’s determined to find something that will make her moon full. Source: TO Books on X (formerly Twitter)
