In a moment of carelessness, he agrees to a "kill exchange" with a psycho. Regret and fear, followed by threats, make him realize that he has nowhere to run. He becomes attached, then addicted… and then he falls in love. He falls apart. He goes insane. Mysterious and cunning madman x ruthless straight guy. This will be dark but pure, sweet but cruel. Please enjoy their story that is about to begin...