Kaori has been forced to live a double life ever since the day she crossed the line with her son, Yoshio. In front of her husband, she plays the gentle, composed wife, but the moment he leaves the house, her hidden desires awaken. While she remains obedient and dutiful to her husband, once he's gone, her heart belongs entirely to her son. Though she tries to cling to reason, her body is already completely addicted to their illicit affairs. Once again today, as she waits for her husband to return, she finds herself consumed by passion, living each day torn between conflicting emotions and overwhelming physical desire.