Tsuyoshi's mother, Shiori, was beautiful and an object of admiration among Tsuyoshi's friends. However, Shiori had a secret. In reality, she was in a physical relationship with Tsuyoshi's friend Akira and had been secretly carrying on the affair behind her family's back. One day, as usual, Shiori slipped away from her family's gaze to invite Akira into their home and indulged in fleeting pleasure. Unbeknownst to her, a hidden camera had captured every detail of their act…
