The February 2017 issue of Kadokawa's Monthly Comp Ace magazine announced on Monday that Kugane Maruyama and Jūami's Overlord: Fushisha no Oh! (Overlord: The Undead Oh!) four-panel spinoff manga will launch in the next issue on January 26. Jūami is drawing the manga and posted an image on Twitter on Friday to confirm the announcement.

The manga is a gag comedy series based on Kugane Maruyama's original Overlord light novels. The series celebrates the anime's compilation films, and the title is a play on Overlord: Fushisha no Ō (Overlord: The Undead King), the title of both the light novel's first volume and the first compilation film.

The magazine serializes Satoshi Ōshio's manga adaptation of Maruyama's novels. Hugin Miyama illustrates the manga from so-bin's original character designs. The sixth compiled book volume shipped on Monday. Yen Press released the third volume in North America on December 20.

Overlord: Fushisha no Ō will open in Japan on February 25, and Overlord: Shikkoku no Senshi (Overlord: The Dark Warrior) will open on March 11. (The films' titles are also the titles of the first two volumes in Kugane Maruyama's original Overlord light novel series.) The films will add new scenes, and original character designer (and original novel illustrator) so-bin drew rough drafts for new characters.

The 13-episode Overlord television anime series premiered in Japan in July 2015. The story takes place in the year 2138 when virtual reality gaming is booming. Yggdrasil, a popular online game, is quietly shut down one day. However, the protagonist Momonga decides to not log out. Momonga is then transformed into the image of a skeleton as "the most powerful wizard." The world continues to change, with non-player characters (NPCs) beginning to feel emotion. Having no parents, friends, or place in society, this ordinary young man Momonga then strives to take over the new world the game has become.

Maruyama began the original light novel series online in 2010, and Kadokawa's Enterbrain imprint then published it in print with illustrations by so-bin in 2012. The series has over 2.5 million copies in print in Japan. Kadokawa released the 11th compiled volume on September 30. Yen Press licensed the novel series for North America, and will publish the third volume on January 31.