A sexy spy and an elite assassin enter into the world's sweetest, deadliest marriage of convenience! Dropping his manipulative facade, Omi asks Neneko to abandon her job so that they can live together as an honest couple. Caught between duty, fear, and what might be love, Neneko struggles to find an answer. Soon afterward, Omi decides to show her around the orphanage where he and Setsu grew up. As he recalls the past, the tragic truth behind his displays of affection comes to light!