Reiko Shimura dreamed of deepening her bond with her son. When her daughter-in-law became pregnant, it sparked a new, forbidden desire within her toward her son, Takafumi. Her actions went far beyond mere harassment of the bride—she crossed the line into a taboo relationship with her own son. As a result, the family's bonds shattered, and her son eventually fell for another woman. Though it happened a year ago, the trauma remains deeply etched in her heart. This is a realistic recreation of the illicit relationships unfolding between mother and son, son and wife—a shocking, emotionally intense record of forbidden passion.