Watch Dirty Pair Flash: The Series

Before being paired up as the "Lovely Angels," Kei and Yuri were junior agents for the 3WA. Although the two were initially hostile toward each other, with Kei even quitting the organization out of frustration, the "Siren" crises forces them to put aside their personal issues. Kei's return to the force also winds up stopping a man named Waldess from slaying Yuri. Now, the pair work well, having picked up their titular nickname from the amount of collateral damage and smoldering rubble that follows their actions. While Kei and Yuri have learned to work together, they still squabble amongst themselves.