Dirty Pair (ダーティペア) is a humorous science fiction Anime
franchise based on the light novel series by Haruka Takachiho.
The stories take place in the years 2138-43, by which time humanity has spread across some few thousand star systems. A corporation called the World Welfare Works Association (also WWWA
or 3WA) helps local systems deal with problems by sending well-armed agents called "trouble consultants" to solve crimes or mysteries, for a fee. The series focuses on a team of trouble consultants named Kei
who have a reputation for leaving a trail of destruction behind them, for which they are called the "Dirty Pair".
The franchise has bounced across multiple formats and production companies, resulting in (so far) a television series, two OVA
series, two OVA features, a feature film, and a number of comic series.
- From Wikipedia