[DeepL Translation - needs review] Volume 1: "The Devil's Support Campaign! Congratulations on your win!" . One day, a young girl in a bondage outfit suddenly appears in Fumio Kijima's room, claiming to be a demon. She calls herself the "Campaign Girl of the Demon World" and gives Fumio the "ability to create a room in the middle of nowhere" on the grounds that he has a rare talent for evil. At first, Fumio does not misuse the room, but uses it for carrying things and other useful purposes, ...
