Seduce and Kill SnK

"Blood is our language. And while you thrive in guns and knives, my sole body is already my lethal weapon." (Haiya)
Haiya and Hans Deveraux both understood the world in its most violent state and to survive means learning to be the predator over other predators. However, as they met, they realize how extremely lonely they have been and how they long for some intimate affection that was deprived of their messy and problematic life. But then, as they search for their emotions in the dark, too many acquaintances, pasts and present intruders severe their relationship. Will they find what their heart are searching for amidst the chaotic violence their lives revolve in?