Waterfalls

Unexpectedly rescued from the torments of Muken by Byakuya and Kisuke, Aizen Sousuke ponders what could drive the two, not just to work together, but to risk the iciest depths of Hueco Mundo to seek a tortured soul so dangerous that the vasto lordes dare not approach it...MxM, mpreg...Kisuke/Byakuya, Aizen/Tetsuya, Ichigo/Renji