Her husband was drunk and asleep, just as she had not intended. Yet the deep, rumbling mechanical sound vibrating inside her body produced a strange, unsettling sensation that stirred her soul. Each time her colleague toyed with the remote control, she twisted her face in helpless agony. Since meeting this man, Mari had gradually awakened to a latent masochistic side she never knew existed within herself. One day, by chance, her affair with him was discovered by a coworker. As a result, she was forced into days of relentless humiliation and degradation. But having already awakened as a woman consumed by desire, she could no longer suppress her own arousal. Her heart continued to tremble—deeper and more intensely with each passing moment.