The story begins with Yggdrasil, a popular online game which 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) begining 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.

Original: Maruyama Kugane
Original Character Design: so-bin
Director: Naoyuki Itō
Series configuration and Screenplay: Yukie Sugawara
Character design and chief animation director: Yoshimatsu Takahiro
Animation Production: Madhouse
Production: overlord Production Committee

Type: TV
Episodes:13
Status: Finished Airing
Aired: Jul 7, 2015 to Sep 29, 2015
Producers: Madhouse
Genres: Action, Fantasy
Duration: 24 min. per ep.
Rating: R - 17+ (violence & profanity)