Shiho, the mother of Tsuyoshi, appeared elegant and popular, drawing particular attention among her circle of friends. However, she harbored a secret unknown to others—her affair with Akira, Tsuyoshi's best friend. Behind her family's back, the two had secretly built a relationship, indulging in passionate encounters even inside the house. One day, during their usual routine, Shiho called Akira over, seeking pleasure right then and there. Unbeknownst to her, a hidden camera had been set up, silently recording her every move.