The official website for the television anime adaptation of Firehead's Kaketa Tsuki no Mercedes: Kyuuketsuki no Kizoku ni Tensei shita kedo Suteraresou nanode Dungeon wo Seiha suru (Mercedes and the Waning Moon: The Dungeoneering Feats of a Discarded Vampire Aristocrat) light novel revealed additional cast and second promotional video. The anime series will premiere in January 2027.

Cast
Benkei: Kenta Miyake (Hidarikiki no Eren)
Kuro: Ryuunosuke Watanuki (Yomi no Tsugai)
Florian: Junichi Suwabe (Tongari Boushi no Atelier)
Lydia Grunewald: Ai Kayano (Futsutsuka na Akujo dewa Gozaimasu ga: Suuguu Chouso Torikae Den)

Kunihisa Sugishima (Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita: Sono Ni) is directing the anime at Teddy. Jun Kumagai (Mizu Zokusei no Mahoutsukai) is handling the series composition. Nami Shouyama (Buddy Daddies animation director) is designing the characters, while R・O・N (Kuroko no Basket) and Shuuhei Mutsuki (Lycoris Recoil) and composing the music.

Firehead originally began writing the adventure fantasy novel on the Shousetsuka ni Narou website in October 2018. TO Books began printing the series featuring illustrations by KeG (Gaikotsu Kishi-sama, Tadaima Isekai e Odekakechuu) in May 2021 and released the fourth volume in August 2025. The fifth volume went on sale on July 15.

A manga adaptation by Pochi Edoya (Mahou Shoujo Ikusei Keikaku manga) began on the Corona EX website in August 2021. TO Books published the sixth volume on July 15.

J-Novel Club licensed both the light novel and manga in English for digital release in November 2024 and released the fourth novel volume on February 13. The fifth manga volume was published on August 5.

PV 2


Source: Comic Natalie