Tsumugi, 27, has been married for four years. Her entertainment career was beginning to take off, but she retired after marrying photographer Yuta and now lives as a housewife. A chance modeling shoot introduces her to a younger man, and once she crosses the line, she can no longer stop. Sexually neglected for too long, she loses all reason at the sight of his cock and whispers that she wants to suck it. Rediscovering how good sex can feel pulls the married woman deeper into a forbidden affair.