Rose is a hitman allowed residency in exchange for her services, but she is careful to keep it secret from the light of her life, her girlfriend. Benika wishes for a relationship where they can see each other more often, but she must also keep it secret from her wholly devout parent. Father Shirogane is concerned his daughter cannot tell him who she is dating, but he also struggles with the hitman who keeps returning to confess her crimes. Amid all the secrecy, a new conspiracy surrounds the three of them, granting Rose an unexpected chance to leave the hitman life for good. But at what cost?