Follows the people in the "Long House of Good People" who are different in appearance, a group of villains disguised as good people. They sometimes help ordinary people in difficulty, sometimes rescue friends in critical moments, and use their superb skills to fight against evil forces.
Ichijo Zentaro, an inspector who is a trend junkie and loves to use out-of-fashion vocabulary used by high school girls, works together with Yuki Maria, a sharp-tongued inspector who has built up a stellar career at the MPD's first division, to solve a serial murder case.
Doi of the Maeda Construction Company's Advertising group has little passion for his work. One day the group's leader Asagawa declares, "Let's build the hangar for Mazinger Z!" Having been dragged in by Asagawa, Doi and his co-workers commence putting on appearances of having taken on this request from a fantasy world.