Kana is enjoying a busy but fulfilling newlywed life when she begins to feel uneasy about the lingering, hungry stares of her neighbor Sakamoto. Several quiet days pass, and she nearly forgets her fear—until they unexpectedly meet in the apartment entrance while her husband is away. The forbidden pleasure she experiences that day refuses to fade. Though her mind still resists, her body begins craving the sensation, drawing the married woman ever deeper into an affair she cannot escape...