Fifty-year-old mother Saori Takagi has a gentle smile and a charming personality highlighted by her prominent fang, but beneath her pure appearance lies a hidden desire to satisfy her own physical needs. One day, after overhearing a friend's story about an affair, she feels a deep sense of emptiness and begins contemplating fulfilling her own desires. Her son accidentally witnesses her in this vulnerable state and, shocked, is overwhelmed by an intense arousal. Unable to suppress the desire growing within him, he becomes drawn to his mother's mature and seductive body. Though surprised by his bold advances, deep down she begins to burn with passion, preparing herself to welcome her son. Marking her debut work, this film signifies the beginning of a new journey for Saori Takagi in the world of incestuous creampie erotica.