A spin-off of the Tenchi Muyo OVAs. Framed as Mihoshi telling the gang a story about her past work as Galactic Police Detective, but filling (almost) all roles in the story with the usual Tenchi characters. The notable exception is her partner Kiyone, who makes her first appearance here. The story itself is rather straight forward and centers on apprehending a thief who stole 'ultra energy material'. With the roles of chaser and chased being played by the main Tenchi Muyo characters, the usual character dynamics from there carry over, e.g. Ayeka and Ryouko competing for Tenchi's romantic attention. New character Kiyone plays the unfortunate roleof strait-laced detective who has to suffer from the ineptitude of her partner Mihoshi.

The plot is nothing to write home about, but there are occasional switches of the narrative back to the main cast on Earth complaining about their depiction in the story, which adds extra amusement. Mainly important for people who intent to watch more of the Tenchi Muyo universe, since it introduces both Kiyone and the Pretty Sammy persona, which feature heavy in later works.