Kawashima has a nice life now, but decides that he needs to kill someone to prevent himself from hurting his family. After much planning he sets in motion to kill a S&M prostitute. Chiaki has other ideas! Both characters are broken by their past demons, both are very likeable and completely misunderstand each others' intentions. The story trundles along at a good pace, there is suitable gore and sexiness in the right places and tension is maintained throughout - there is not much mystery about where it is heading though. A pleasant afternoon read.