Mariko Takeshita is a married woman overwhelmed by work, leading to a strained relationship with her husband. Burdened with frustration and loneliness, she struggles to suppress her emotions. One day, her son's friend comes over to visit. His presence deeply unsettles her. From the moment she sees him, she becomes acutely aware of him as a man, and her pent-up desires begin to spiral out of control. She whispers, "It's my husband's fault that I've become like this..."