Sakuwa is a housewife who has been having an affair with her husband's boss. One day, while enjoying some extramarital sex, her boss receives a call on his mobile phone. "What? Sasaki... had an accident?" It's the news of her husband's death. With no time to grieve, the funeral proceeds, and her boss once again ties her up in front of her husband's portrait and performs a training play on her, saying, "I'll protect you." With nowhere to go, Sakuwa gives in to the pleasure and continues her relationship with her boss...