Saeko Shirai is a married woman working as an insurance sales agent, visiting various households in an effort to improve her sales performance. One day, she arrives at a residence occupied by a foreigner. The man who appears before her is a striking black man with a strong, muscular build, immediately capturing her attention. Suffering from sexual frustration, Saeko begins indulging in vivid fantasies about him—fantasies that soon blur the line between imagination and reality.