Swan's Song

Mina and Mizuki sisters attended a ballet class in Tokyo. One day, the sisters return home separately, but the younger sister, Mizuki, is kidnapped on the way home and discovered as a corpse. On that day, Mina blames herself for returning home and leaving her sister to practice ballet staying. Her mother, Teruko, is also very upset by the news of the discovery of her body, causing deep emotional wounds.