Four years into her marriage, housewife Mami still has no children. Her relationship with her husband feels like pure "selfishness," as if she's doing whatever she pleases. Yet, this very freedom is what draws her to him. Their marriage is harmonious, built on a mutual understanding of casual affairs. Today, without telling her husband, she skips preparing dinner and heads out for an evening rendezvous. Despite feelings of guilt, she finds herself being taken by a man she's just met. Her inner emotions in that moment, and the shifting feelings emerging toward her husband, deepen the story.