Sakura, who takes the train to school every day, suddenly becomes the target of a molester. The man approaches silently, his fingers bringing her pleasure far beyond imagination. Though her mind resists in disgust, her body instinctively responds. Unable to utter a sound, she's shocked to feel her arousal gushing out uncontrollably. It's not a red thread of fate binding them, but a string of impure desire. Obedient Sakura surrenders herself once again to those wicked fingers. Their illicit relationship in the midst of daily life grows deeper each day.