A Pale View of Hills by Kazuo Ishiguro

Klara and the Sun tells the story of Etsuko, a Japanese woman now living alone in England, dwelling on the recent suicide of her daughter. Retreating into the past, she finds herself reliving one particular hot summer in Nagasaki, when she and her friends struggled to rebuild their lives after the war. But as she recalls her strange friendship with Sachiko - a wealthy woman reduced to vagrancy - the memories start to take on a disturbing cast.