Angel of decay

"What is worth sacrificing for love?" This is the question that 17 year old Serena Pearl constantly asks herself after she meets gorgeous, mysterious, and downright unpredictable Saito Kurai yui. He is the absolute definition of a stereotypical bad boy that all the girls would drool over, and it dosn't take long even for a girl as stubborn as Serena to fall under his spell. The only problem; he works for a terrorist organization hell bent on destroying the human spirt and exterminating all of humanity. To make matters worse Saito develops an obsessive interest in Serena, in more ways than one; and Saito's boss has his sights set on recruiting her and poor Serena is caught in the middle. Unfortunately her choices are made even more difficult when she discoverers that everyone single member of that organization, including Saito, is not human...