An Affair

Seo-hyun, a housewife in her late thirties, lives a quiet life with her ten-year-old son and her husband, who is a successful architect. Her daily routine feels predictable and uneventful until her younger sister introduces Woo-in, her new fiancé, who is notably younger and attractive. Woo-in's arrival disrupts Seo-hyun's sheltered existence and challenges the stability of her family life.