The Unwanted Undead Adventurer
The Unwanted Undead Adventurer is a Japanese light novel series written by Yū Okano and illustrated by Jaian. It has been serialized online via the user-generated novel publishing website Shōsetsuka ni Narō since September 2016. It was later acquired by Overlap, who have published fourteen volumes since October 2017 under their Overlap Novels imprint.
A manga adaptation illustrated by Haiji Nakasone has been serialized in Overlap's Comic Gardo website since November 2017, with its chapters collected into thirteen volumes as of August 2025. An anime television series adaptation produced by Connect aired from January to March 2024. A second season has been announced.
Plot
Rentt Faina is a 25-year-old who has been a Bronze-class adventurer for a decade. One day while he is in the Labyrinth of the Moon's Reflection, he finds an undiscovered path. Unfortunately for him, he comes across a dragon's lair and is devoured. Sometime later, Rentt awakens as an undead skeleton. He soon begins a quest to achieve Existential Evolution so he can rejoin civilization.Characters
;Rentt Faina;Lorraine Vivie
;Sheila Ibarss
;Rina Rupaage
;Mysterious Woman
;Rize Dunner
;Laura Satii
;Wolff
;Alize
;Lillian
;Edel
;Isaac Hart
;Laura Latour
Media
Light novels
Written by Yū Okano, The Unwanted Undead Adventurer began publication online via the user-generated novel publishing website Shōsetsuka ni Narō on September 22, 2016. The series was later acquired by Overlap, who began publishing the novels with illustrations by Jaian on October 25, 2017, under their Overlap Novels imprint. As of December 25, 2024, fourteen volumes have been released. In February 2018, J-Novel Club announced that it had licensed the novels in North America.Manga
A manga adaptation illustrated by Haiji Nakasone began serialization online via Overlap's Comic Gardo website on November 24, 2017. As of August 25, 2025, thirteen volumes have been released. In April 2019, J-Novel Club announced that it had also licensed the manga.Anime
An anime television series adaptation was announced at the "Overlap Bunko 9th Anniversary Online Event" on April 17, 2022. It was produced by Connect and directed by Noriaki Akitaya, with scripts written by Yukie Sugawara, character designs handled by Takao Sano, and music composed by Shun Narita. The series aired from January 8 to March 25, 2024, on AT-X and other networks. The opening theme song is "Immortal", performed by Juvenile, while the ending theme song is "Keep Your Fire Burning", performed by Mao Abe. Crunchyroll streamed the series. Muse Communication licensed the series in South and Southeast Asia.A second season was announced at the Overlap Bunko 10th anniversary event on December 15, 2024.