Reincarnated Into a Game as the Hero's Friend: Running the Kingdom Behind the Scenes (魔王と勇者の戦いの裏で ～ゲーム世界に転生したけど友人の勇者が魔王討伐に旅立ったあとの国内お留守番, Maō to Yūsha no Tatakai no Ura de: Gēmu Sekai ni Tensei Shitakedo Yūjin no Yūsha ga Maō Tōbatsu ni Tabidatta Ato no Kokunai Orushuban) is a Japanese light novel series written by Yuki Suzuki and illustrated by Sanshouuo.

It began serialization on the user-generated novel publishing website Shōsetsuka ni Narō in March 2021.

Written by Yuki Suzuki, Reincarnated Into a Game as the Hero's Friend: Running the Kingdom Behind the Scenes began serialization on the user-generated novel publishing website Shōsetsuka ni Narō on March 2, 2021.

[3] A manga adaptation illustrated by Rampei Ashio began serialization on Overlap's Comic Gardo website on July 15, 2022.

[13] The manga's chapters have been collected into four tankōbon volumes as of July 2024.