Based on Ekaterina Kurae's chapter 16 from the manga, and episode 10.5 of the anime.

When Mafuyu Oribe and her adopted sister Tomo rescue a strange wounded man, they have no idea what they're getting involved with or what the consequences will be. Alexander Nikolaevith Hell is an Iron Qwaser, one of many opposing factions of super-warriors who can each draw upon the power of an element and wield it as an almost unstoppable array of weapons. And unfortunately for Mafuyu, Alexander's faction is there to gather the mystical relics known collectively as the High Circuit, which puts her friends, family and school at ground zero in a battle for the fate of all mankind! But there's an even more disturbing twist, as Qwasers require a special liquid diet to manifest their powers, one provided by the women who serve as a Qwaser's partner. And THAT means that the nursing Mafuyu's already given Alexander isn't the only kind of nursing he needs! 
(Source: Sentai Filmworks)

It's Chief Gooley's worst nightmare come true. The Lovely Angels are back on the job, but this time the 3WA's Central Computer has assigned them two cases at the same time: investigate a space liner explosion in which three hundred people died, but no one`s come forward to claim any insurance money; and find a missing scientist and his family. 
Could the two cases be connected? Only the Central Computer knows and it's not talking. So it's up the Dirty Pair to get down and dirty and solve the puzzle before time runs out for a grieving grandfather, his family and the universe! 
(Source: AniDB)

TAKI Corporation