The female protagonist is a widow, a middle-aged woman who has been unable to recover from the shock of her beloved husband's death for years, living only in her home and reminiscing about their time together. Originally lively and outgoing, she was affectionate and lived a life loved as a devoted wife and good mother, but due to her husband's sudden illness and death, she has been confined to her home for 10 years. They have no children; being free-spirited, she met her husband late in life and married him, becoming a DINK (Double Income No Kids) couple content with their life together without children. After 10 years of staying at home, she accepts Kwak Se-woo, a freshman college student, as a boarder at the urging of those around her.