40-year-old Nanami Hirose. By day, she works as a life insurance saleswoman and has been married for 16 years. However, one day, the discovery that her affair partner was an S completely changed her inner world. Since then, the latent masochistic desires buried within her have gradually awakened. She began craving increasingly intense and twisted pleasures. The urge to be taken by someone became unbearable, consuming her every day. Her heart now feels completely beyond control.