is a Japanese manga series written and illustrated by Hekiru Hikawa. It began serialization in Kodansha's Monthly Morning Two magazine in August 2021, and has been compiled into nine volumes as of March 2026. An anime television series adaptation produced by Liden Films is set to premiere in July 2026.
The series follows Ryà «sei Narukami, a NEET who lives alone and plays video games. He is actually the reincarnation of a demon lord from another world. One day, a high school girl named Meteor Hanaori shows up in his apartment, who turns out to be the reincarnation of the hero that defeated him during his life as a demon lord. Things get complicated when Ryà «sei gets a job as a teacher in Meteor's high school.
The series is written and illustrated by Hekiru Hikawa. It began serialization in Kodansha's Monthly Morning Two magazine on August 23, 2021. The first volume was published on February 22, 2022. Nine volumes have been released as of March 2026.
In December 2025, Seven Seas Entertainment announced that they had licensed the series for English publication in an 2-in-1 omnibus format, with the first omnibus set to be released in October 2026.
An anime television series adaptation was announced on September 21, 2025. It will be produced by Liden Films and directed by Hideyo Yamamoto, with series composition handled by Yukie Sugawara, characters designed by Yousuke Okuda, and music composed by Yukari Hashimoto and R.O.N. The series is set to premiere in July 2026 on the Animazing!!! programming block on ABC Television, TV Asahi and their affiliates.