is a Japanese manga series written and illustrated by Masamichi Sato. It began serialization on Kodansha's Comic Days website in May 2020. As of April 2026, the series' individual chapters have been collected into seventeen volumes. An anime television series adaptation produced by 100studio and Studio Palette aired from July to September 2024.

Plot During the development of a virtual reality massively multiplayer online role-playing game, the game's quality assurance testers were trapped inside it. One year later, a tester named Haga continues his work by testing the game and submitting bug reports to its developers, while other testers recklessly use their debug mode access and abuse the game's non-player characters (NPCs). After a NPC named Nikola recovers from an event in the game's story that was supposed to kill everyone in her village, she joins Haga in his travels.

Characters

A debugger who has been working tirelessly to report all the bugs within the game. Unlike the other debuggers who are either incapacitated or are slacking off, he continues to work diligently to report the game's bugs and refuses to use his debug stone that grants him special powers as he wants to see things from a typical gamer's perspective.

An NPC who accompanies Haga on his journey. She is killed after first meeting Haga, but is revived. She is also the embodiment of the game's meta AI program called Tesla. As Tesla, she orders Haga to collect the debug stones from the debuggers who abuse them.

Media Manga Written and illustrated by Masamichi Sato, the series began serialization on Kodansha's Comic Days manga website on May 30, 2020. As of August 2026, the series' individual chapters have been collected into eighteen volumes.

In May 2021, Kodansha USA announced that they licensed the series for digital English publication. In July 2022, during their panel at Anime Expo, Kodansha USA announced the print release of the series.

Volumes

Anime An anime television series adaptation was announced in March 2023. The series is produced by 100studio and Studio Palette, and directed by Kei Umabiki, with series composition by Shogo Yasukawa, character designs by Shigeo Akahori, and music composed by Yuta Kasai, Seima Iwahashi and Daisuke Horikawa of Elements Garden. It was originally scheduled for April 2024, but was delayed to July, and eventually aired from July 6 to September 28, 2024, on the Animeism programming block on MBS, TBS and BS-TBS. The opening theme song is "No Complete" performed by Liyuu, while the ending theme song is "Loop" performed by Nacherry (a voice unit composed of Chiemi Tanaka and Natsumi Murakami). Crunchyroll streamed the series. Medialink licensed the series in East and Southeast Asia for streaming on Ani-One Asia's YouTube channel.

Episodes

Reception Yasushi Kobayashi from Da Vinci offered praise to the story, calling it intense. Masaki Endo from Tsutaya News also offered praise, calling it unique from works in the isekai genre. The reviewer from had similar feelings, calling the story fun.

Notes

References

External links