Lighting Up the Dark (TMNT 2k12 Fanfic)

Fraternal twins May and Kai are the only two people to survive a mass government disagreement. They find life in the sewers. Injured and exhausted, they pass out in the tunnels, only to be found by five beings they didn't know existed. Now they begin new lives, realizing they each have an attraction to the ones clad in purple and red.