Ayano Sakurai, a 44-year-old housewife, lives with her husband and son. Her husband is often away on business, leaving her alone at home with just her son. Before becoming a mother, she cherished her time as a woman, valuing moments of intimacy with herself—solitary pleasures she could only experience in private. But her world shatters when she discovers her son has been secretly filming her. Overcome by uncontrollable desire, her relationship with her son takes a shocking turn into forbidden territory.