Looking at it from a different perspective, this sob story is quite meaningless as they are all hired killers. Some less vicious, others violent, but in the end it's all the same. They take lives, and people still die because of them, just from different methods.
Would've been better if author didn't try to paint the guy as perverted and the other girl as innocent. They simply have different desires, Owl like girls, Snake like Nighthawk specifically.