Tamae, a beautiful and gentle married woman, works at Nakahara Trusty Denko, a company run by her stepfather, Kozo, who is the president. Recently, she has noticed a change in her husband's behavior and feels a growing distance between them, leading her to suspect he might be cheating. When she confides her concerns, Kozo admits he too has sensed something wrong in their marriage. They have been sexually inactive for over two months, and this situation has left her deeply anxious. Deciding to take matters into his own hands, Kozo frames Tamae as the person responsible for causing damage to the company. Using this leverage, he begins to blackmail her, demanding sexual favors and gradually forcing her into submission.