Keiji, her son's childhood friend, had always been someone Shihou could trust. Lately, however, she noticed his gaze toward her had become distinctly different. Though aware of it, Shihou desperately tried to ignore it. One day, Keiji sneaked up on her in the bathroom and peeped at her from behind. Hiding her shock and confusion, she gently scolded him as a mother would. But Keiji's reaction was unexpected—he became intensely aroused on the spot, openly revealing his desire. Shihou could no longer conceal her surprise and confusion, and gradually began to recognize her own conflicting emotions.