In her third year of marriage, Ayumi's quiet home life is disrupted by the sudden arrival of a mysterious man. He works in the financial industry and has discovered that Ayumi's former lover defaulted on a massive debt—and she is the co-signer. Shocked by the enormous sum she now owes, Ayumi is offered a solution: work in the sex industry. But torn between her husband's wounded pride and her own growing unease at the man's intense, possessive demeanor, she hesitates. Then the man proposes a different option: "If that's the case, we can just do it here at your home..."