Kei and Yuri are operatives dispatched by the for-profit World Welfare Works Association to resolve crises throughout the universe. Their prefered codename may be "Lovely Angels," but their on-the-job effectiveness - rivaled only by the path of destruction left in their wake - has earned them a very public, very unwanted nickname: the "Dirty Pair."
See also Dirty Pair Flash. Kept separate in the tagging because of distinctive character design changes, and because it was an alternate telling rather than just a refreshening.