Nanako, who came from a poor family, was mocked for her poverty by a boy she liked in her childhood, which became a lasting trauma for her. At that moment, Nanako made a resolution: "I will definitely marry into wealth and status!"

As an adult, Nanako got a job at a major company that everyone envies. She worked on improving herself, became beautiful, and lived so elegantly that everyone around her thought she was from a wealthy family. The man Nanako has set her sights on for marriage is her company's handsome division chief, Kuroki.

However, one day, the apartment where Nanako lives burns down in a fire! Desperately seeking affordable housing, Nanako decides to move into a shared house located in an old traditional home... But who does she find living there? None other than Chief Kuroki himself! Moreover, his attitude is completely different from at work—he's super sadistic (S)!

With nowhere else to go, Nanako ends up living under the same roof and sharing a life with this sadistic chief...!