Ririchiyo Shirakiin wants to live independently and doesn't think she deserves the wealth and privileges she's been given as she goes to stay at the Maison de Ayakashi, an apartment for the elite families of Japan that is so secure, each tenant gets their own Secret Service (SS) agent to protect them. Ririchiyo doesn't care about that, and just wants to live independently by herself. However, she finds out her assigned SS agent is actually a surprisingly servile bishonen named Soushi Miketsukami.
Despite her repeated attempts to shoo him away, Soushi keeps returning to his new master's side. Late one night, he even catches a bullet from a man trying to rob her at gunpoint. After that, she decides to let him stay as her SS agent.