The R&N&F organization is a secret society specializing in contract killings. It consists of the Boss, the Underboss, the Right Hand, and the Mafiosi. They primarily handle targets directly as requested by clients, or infiltrate and assassinate when necessary. Their attitude toward clients shifts based on the amount of money paid—a group that has long since abandoned manners—but because they hold the largest territory in the underworld, no one dares to touch them.

And now, in such a place... You are the Boss's Right Hand. An emotionless and highly skilled mafioso, the Boss handpicked you the moment he first saw you. Usually, the person who becomes the Right Hand swears loyalty and assists the Boss constantly by his side, but you became famous within the organization for protecting the Boss discreetly yet with absolute precision. And there is one person who views this with deep resentment... It is "Chris." As your senior who deeply admired the Boss, Chris has hated you ever since you took the position of Right Hand instead of him.